Why you should remove the negative battery terminal before doing ANYTHING!!!!
11-11-2007 | 02:33 AM
#16
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doingANYTHING!!!!
Tony Hwang wrote:
> jim beam wrote:
>> Tony Hwang wrote:
>>
>>> jim beam wrote:
>>>
>>>> Hachiroku wrote:
>>>> <snip crap>
>>>>
>>>>> I had heard of this before; I can't remember what the car was, but
>>>>> someone
>>>>> shorted out the ECU replacing the dome light...
>>>>
>>>>
>>>>
>>>> no way - the ecu's not even connected to the dome light. and
>>>> they're electrically protected against all kinds of "user error",
>>>> including battery reversal, over-voltage, dead shorts and static.
>>>> short of direct lightning strike, water damage, or fire, none of
>>>> which have a single damned thing to do with dome lights, the ecu's
>>>> not going anywhere and it's /certainly/ not going to be fubared by a
>>>> bulb change.
>>>
>>> Hi,
>>> No way? If short caused a surge in the electrical system,
>>
>>
>> short won't cause voltage surge. measure the voltage across a battery
>> as you increase current load - voltage goes down, not up. only other
>> potential source of surge is back emf from relays, motors, etc, and
>> they're all diode/condenser protected, as is the ecu. bottom line:
>> it's not the dome light.
>>
>>
>>> anything is possible.
>>
>>
>> yeah, it could have been hit by meteorite.
>>
>>> In cases like this mostly nothing serious happens but result
>>> unpredictable. Protection is not absolute 100%.
>>
>>
>> yeah, it could have been hit by meteorite.
> hmmm,
> Whatever you think. A car battery has lots of energy in it.
> Think current in this case.
do what i said - measure voltage as a function of load. then report
your results.
> jim beam wrote:
>> Tony Hwang wrote:
>>
>>> jim beam wrote:
>>>
>>>> Hachiroku wrote:
>>>> <snip crap>
>>>>
>>>>> I had heard of this before; I can't remember what the car was, but
>>>>> someone
>>>>> shorted out the ECU replacing the dome light...
>>>>
>>>>
>>>>
>>>> no way - the ecu's not even connected to the dome light. and
>>>> they're electrically protected against all kinds of "user error",
>>>> including battery reversal, over-voltage, dead shorts and static.
>>>> short of direct lightning strike, water damage, or fire, none of
>>>> which have a single damned thing to do with dome lights, the ecu's
>>>> not going anywhere and it's /certainly/ not going to be fubared by a
>>>> bulb change.
>>>
>>> Hi,
>>> No way? If short caused a surge in the electrical system,
>>
>>
>> short won't cause voltage surge. measure the voltage across a battery
>> as you increase current load - voltage goes down, not up. only other
>> potential source of surge is back emf from relays, motors, etc, and
>> they're all diode/condenser protected, as is the ecu. bottom line:
>> it's not the dome light.
>>
>>
>>> anything is possible.
>>
>>
>> yeah, it could have been hit by meteorite.
>>
>>> In cases like this mostly nothing serious happens but result
>>> unpredictable. Protection is not absolute 100%.
>>
>>
>> yeah, it could have been hit by meteorite.
> hmmm,
> Whatever you think. A car battery has lots of energy in it.
> Think current in this case.
do what i said - measure voltage as a function of load. then report
your results.
11-11-2007 | 03:01 AM
#17
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doingANYTHING!!!!
jim beam wrote:
> Tony Hwang wrote:
>
>> jim beam wrote:
>>
>>> Tony Hwang wrote:
>>>
>>>> jim beam wrote:
>>>>
>>>>> Hachiroku wrote:
>>>>> <snip crap>
>>>>>
>>>>>> I had heard of this before; I can't remember what the car was, but
>>>>>> someone
>>>>>> shorted out the ECU replacing the dome light...
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> no way - the ecu's not even connected to the dome light. and
>>>>> they're electrically protected against all kinds of "user error",
>>>>> including battery reversal, over-voltage, dead shorts and static.
>>>>> short of direct lightning strike, water damage, or fire, none of
>>>>> which have a single damned thing to do with dome lights, the ecu's
>>>>> not going anywhere and it's /certainly/ not going to be fubared by
>>>>> a bulb change.
>>>>
>>>>
>>>> Hi,
>>>> No way? If short caused a surge in the electrical system,
>>>
>>>
>>>
>>> short won't cause voltage surge. measure the voltage across a
>>> battery as you increase current load - voltage goes down, not up.
>>> only other potential source of surge is back emf from relays, motors,
>>> etc, and they're all diode/condenser protected, as is the ecu.
>>> bottom line: it's not the dome light.
>>>
>>>
>>>> anything is possible.
>>>
>>>
>>>
>>> yeah, it could have been hit by meteorite.
>>>
>>>> In cases like this mostly nothing serious happens but result
>>>> unpredictable. Protection is not absolute 100%.
>>>
>>>
>>>
>>> yeah, it could have been hit by meteorite.
>>
>> hmmm,
>> Whatever you think. A car battery has lots of energy in it.
>> Think current in this case.
>
>
> do what i said - measure voltage as a function of load. then report
> your results.
Hmmm,
No, current as a function of load! Do you remember the days of
generators under the automobile hoods?
> Tony Hwang wrote:
>
>> jim beam wrote:
>>
>>> Tony Hwang wrote:
>>>
>>>> jim beam wrote:
>>>>
>>>>> Hachiroku wrote:
>>>>> <snip crap>
>>>>>
>>>>>> I had heard of this before; I can't remember what the car was, but
>>>>>> someone
>>>>>> shorted out the ECU replacing the dome light...
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> no way - the ecu's not even connected to the dome light. and
>>>>> they're electrically protected against all kinds of "user error",
>>>>> including battery reversal, over-voltage, dead shorts and static.
>>>>> short of direct lightning strike, water damage, or fire, none of
>>>>> which have a single damned thing to do with dome lights, the ecu's
>>>>> not going anywhere and it's /certainly/ not going to be fubared by
>>>>> a bulb change.
>>>>
>>>>
>>>> Hi,
>>>> No way? If short caused a surge in the electrical system,
>>>
>>>
>>>
>>> short won't cause voltage surge. measure the voltage across a
>>> battery as you increase current load - voltage goes down, not up.
>>> only other potential source of surge is back emf from relays, motors,
>>> etc, and they're all diode/condenser protected, as is the ecu.
>>> bottom line: it's not the dome light.
>>>
>>>
>>>> anything is possible.
>>>
>>>
>>>
>>> yeah, it could have been hit by meteorite.
>>>
>>>> In cases like this mostly nothing serious happens but result
>>>> unpredictable. Protection is not absolute 100%.
>>>
>>>
>>>
>>> yeah, it could have been hit by meteorite.
>>
>> hmmm,
>> Whatever you think. A car battery has lots of energy in it.
>> Think current in this case.
>
>
> do what i said - measure voltage as a function of load. then report
> your results.
Hmmm,
No, current as a function of load! Do you remember the days of
generators under the automobile hoods?
11-11-2007 | 03:28 AM
#18
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doingANYTHING!!!!
Tony Hwang wrote:
> jim beam wrote:
>> Tony Hwang wrote:
>>
>>> jim beam wrote:
>>>
>>>> Tony Hwang wrote:
>>>>
>>>>> jim beam wrote:
>>>>>
>>>>>> Hachiroku wrote:
>>>>>> <snip crap>
>>>>>>
>>>>>>> I had heard of this before; I can't remember what the car was,
>>>>>>> but someone
>>>>>>> shorted out the ECU replacing the dome light...
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> no way - the ecu's not even connected to the dome light. and
>>>>>> they're electrically protected against all kinds of "user error",
>>>>>> including battery reversal, over-voltage, dead shorts and static.
>>>>>> short of direct lightning strike, water damage, or fire, none of
>>>>>> which have a single damned thing to do with dome lights, the ecu's
>>>>>> not going anywhere and it's /certainly/ not going to be fubared by
>>>>>> a bulb change.
>>>>>
>>>>>
>>>>> Hi,
>>>>> No way? If short caused a surge in the electrical system,
>>>>
>>>>
>>>>
>>>> short won't cause voltage surge. measure the voltage across a
>>>> battery as you increase current load - voltage goes down, not up.
>>>> only other potential source of surge is back emf from relays,
>>>> motors, etc, and they're all diode/condenser protected, as is the
>>>> ecu. bottom line: it's not the dome light.
>>>>
>>>>
>>>>> anything is possible.
>>>>
>>>>
>>>>
>>>> yeah, it could have been hit by meteorite.
>>>>
>>>>> In cases like this mostly nothing serious happens but result
>>>>> unpredictable. Protection is not absolute 100%.
>>>>
>>>>
>>>>
>>>> yeah, it could have been hit by meteorite.
>>>
>>> hmmm,
>>> Whatever you think. A car battery has lots of energy in it.
>>> Think current in this case.
>>
>>
>> do what i said - measure voltage as a function of load. then report
>> your results.
> Hmmm,
> No, current as a function of load!
electrical current /is/ load...
take any battery, then measure the voltage as you increase current load
on it. then let us know what happens. and how you think high current
[short] can cause a "surge".
> Do you remember the days of
> generators under the automobile hoods?
why? have any basic laws of physics changed since then?
> jim beam wrote:
>> Tony Hwang wrote:
>>
>>> jim beam wrote:
>>>
>>>> Tony Hwang wrote:
>>>>
>>>>> jim beam wrote:
>>>>>
>>>>>> Hachiroku wrote:
>>>>>> <snip crap>
>>>>>>
>>>>>>> I had heard of this before; I can't remember what the car was,
>>>>>>> but someone
>>>>>>> shorted out the ECU replacing the dome light...
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> no way - the ecu's not even connected to the dome light. and
>>>>>> they're electrically protected against all kinds of "user error",
>>>>>> including battery reversal, over-voltage, dead shorts and static.
>>>>>> short of direct lightning strike, water damage, or fire, none of
>>>>>> which have a single damned thing to do with dome lights, the ecu's
>>>>>> not going anywhere and it's /certainly/ not going to be fubared by
>>>>>> a bulb change.
>>>>>
>>>>>
>>>>> Hi,
>>>>> No way? If short caused a surge in the electrical system,
>>>>
>>>>
>>>>
>>>> short won't cause voltage surge. measure the voltage across a
>>>> battery as you increase current load - voltage goes down, not up.
>>>> only other potential source of surge is back emf from relays,
>>>> motors, etc, and they're all diode/condenser protected, as is the
>>>> ecu. bottom line: it's not the dome light.
>>>>
>>>>
>>>>> anything is possible.
>>>>
>>>>
>>>>
>>>> yeah, it could have been hit by meteorite.
>>>>
>>>>> In cases like this mostly nothing serious happens but result
>>>>> unpredictable. Protection is not absolute 100%.
>>>>
>>>>
>>>>
>>>> yeah, it could have been hit by meteorite.
>>>
>>> hmmm,
>>> Whatever you think. A car battery has lots of energy in it.
>>> Think current in this case.
>>
>>
>> do what i said - measure voltage as a function of load. then report
>> your results.
> Hmmm,
> No, current as a function of load!
electrical current /is/ load...
take any battery, then measure the voltage as you increase current load
on it. then let us know what happens. and how you think high current
[short] can cause a "surge".
> Do you remember the days of
> generators under the automobile hoods?
why? have any basic laws of physics changed since then?
11-11-2007 | 11:44 AM
#19
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doingANYTHING!!!!
jim beam wrote:
> Tony Hwang wrote:
>
>> jim beam wrote:
>>
>>> Tony Hwang wrote:
>>>
>>>> jim beam wrote:
>>>>
>>>>> Tony Hwang wrote:
>>>>>
>>>>>> jim beam wrote:
>>>>>>
>>>>>>> Hachiroku wrote:
>>>>>>> <snip crap>
>>>>>>>
>>>>>>>> I had heard of this before; I can't remember what the car was,
>>>>>>>> but someone
>>>>>>>> shorted out the ECU replacing the dome light...
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> no way - the ecu's not even connected to the dome light. and
>>>>>>> they're electrically protected against all kinds of "user error",
>>>>>>> including battery reversal, over-voltage, dead shorts and
>>>>>>> static. short of direct lightning strike, water damage, or fire,
>>>>>>> none of which have a single damned thing to do with dome lights,
>>>>>>> the ecu's not going anywhere and it's /certainly/ not going to be
>>>>>>> fubared by a bulb change.
>>>>>>
>>>>>>
>>>>>>
>>>>>> Hi,
>>>>>> No way? If short caused a surge in the electrical system,
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> short won't cause voltage surge. measure the voltage across a
>>>>> battery as you increase current load - voltage goes down, not up.
>>>>> only other potential source of surge is back emf from relays,
>>>>> motors, etc, and they're all diode/condenser protected, as is the
>>>>> ecu. bottom line: it's not the dome light.
>>>>>
>>>>>
>>>>>> anything is possible.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> yeah, it could have been hit by meteorite.
>>>>>
>>>>>> In cases like this mostly nothing serious happens but result
>>>>>> unpredictable. Protection is not absolute 100%.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> yeah, it could have been hit by meteorite.
>>>>
>>>>
>>>> hmmm,
>>>> Whatever you think. A car battery has lots of energy in it.
>>>> Think current in this case.
>>>
>>>
>>>
>>> do what i said - measure voltage as a function of load. then report
>>> your results.
>>
>> Hmmm,
>> No, current as a function of load!
>
>
> electrical current /is/ load...
>
> take any battery, then measure the voltage as you increase current load
> on it. then let us know what happens. and how you think high current
> [short] can cause a "surge".
>
>> Do you remember the days of generators under the automobile hoods?
>
>
>
> why? have any basic laws of physics changed since then?
No. Some times in real world things happen where basic law has
difficulty to explain how and why.
First thing I learned about generator when I was a kid was polarizing.
> Tony Hwang wrote:
>
>> jim beam wrote:
>>
>>> Tony Hwang wrote:
>>>
>>>> jim beam wrote:
>>>>
>>>>> Tony Hwang wrote:
>>>>>
>>>>>> jim beam wrote:
>>>>>>
>>>>>>> Hachiroku wrote:
>>>>>>> <snip crap>
>>>>>>>
>>>>>>>> I had heard of this before; I can't remember what the car was,
>>>>>>>> but someone
>>>>>>>> shorted out the ECU replacing the dome light...
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> no way - the ecu's not even connected to the dome light. and
>>>>>>> they're electrically protected against all kinds of "user error",
>>>>>>> including battery reversal, over-voltage, dead shorts and
>>>>>>> static. short of direct lightning strike, water damage, or fire,
>>>>>>> none of which have a single damned thing to do with dome lights,
>>>>>>> the ecu's not going anywhere and it's /certainly/ not going to be
>>>>>>> fubared by a bulb change.
>>>>>>
>>>>>>
>>>>>>
>>>>>> Hi,
>>>>>> No way? If short caused a surge in the electrical system,
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> short won't cause voltage surge. measure the voltage across a
>>>>> battery as you increase current load - voltage goes down, not up.
>>>>> only other potential source of surge is back emf from relays,
>>>>> motors, etc, and they're all diode/condenser protected, as is the
>>>>> ecu. bottom line: it's not the dome light.
>>>>>
>>>>>
>>>>>> anything is possible.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> yeah, it could have been hit by meteorite.
>>>>>
>>>>>> In cases like this mostly nothing serious happens but result
>>>>>> unpredictable. Protection is not absolute 100%.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> yeah, it could have been hit by meteorite.
>>>>
>>>>
>>>> hmmm,
>>>> Whatever you think. A car battery has lots of energy in it.
>>>> Think current in this case.
>>>
>>>
>>>
>>> do what i said - measure voltage as a function of load. then report
>>> your results.
>>
>> Hmmm,
>> No, current as a function of load!
>
>
> electrical current /is/ load...
>
> take any battery, then measure the voltage as you increase current load
> on it. then let us know what happens. and how you think high current
> [short] can cause a "surge".
>
>> Do you remember the days of generators under the automobile hoods?
>
>
>
> why? have any basic laws of physics changed since then?
No. Some times in real world things happen where basic law has
difficulty to explain how and why.
First thing I learned about generator when I was a kid was polarizing.
11-11-2007 | 12:23 PM
#20
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doing ANYTHING!!!!
In article <njGZi.199132$Da.76434@pd7urf1no>,
Tony Hwang <dragon40@shaw.ca> wrote:
> jim beam wrote:
> > Tony Hwang wrote:
> >
> >> jim beam wrote:
> >>
> >>> Tony Hwang wrote:
> >>>
> >>>> jim beam wrote:
> >>>>
> >>>>> Tony Hwang wrote:
> >>>>>
> >>>>>> jim beam wrote:
> >>>>>>
> >>>>>>> Hachiroku wrote:
> >>>>>>> <snip crap>
> >>>>>>>
> >>>>>>>> I had heard of this before; I can't remember what the car was,
> >>>>>>>> but someone
> >>>>>>>> shorted out the ECU replacing the dome light...
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> no way - the ecu's not even connected to the dome light. and
> >>>>>>> they're electrically protected against all kinds of "user error",
> >>>>>>> including battery reversal, over-voltage, dead shorts and
> >>>>>>> static. short of direct lightning strike, water damage, or fire,
> >>>>>>> none of which have a single damned thing to do with dome lights,
> >>>>>>> the ecu's not going anywhere and it's /certainly/ not going to be
> >>>>>>> fubared by a bulb change.
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> Hi,
> >>>>>> No way? If short caused a surge in the electrical system,
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> short won't cause voltage surge. measure the voltage across a
> >>>>> battery as you increase current load - voltage goes down, not up.
> >>>>> only other potential source of surge is back emf from relays,
> >>>>> motors, etc, and they're all diode/condenser protected, as is the
> >>>>> ecu. bottom line: it's not the dome light.
> >>>>>
> >>>>>
> >>>>>> anything is possible.
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> yeah, it could have been hit by meteorite.
> >>>>>
> >>>>>> In cases like this mostly nothing serious happens but result
> >>>>>> unpredictable. Protection is not absolute 100%.
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> yeah, it could have been hit by meteorite.
> >>>>
> >>>>
> >>>> hmmm,
> >>>> Whatever you think. A car battery has lots of energy in it.
> >>>> Think current in this case.
> >>>
> >>>
> >>>
> >>> do what i said - measure voltage as a function of load. then report
> >>> your results.
> >>
> >> Hmmm,
> >> No, current as a function of load!
> >
> >
> > electrical current /is/ load...
> >
> > take any battery, then measure the voltage as you increase current load
> > on it. then let us know what happens. and how you think high current
> > [short] can cause a "surge".
> >
> >> Do you remember the days of generators under the automobile hoods?
> >
> >
> >
> > why? have any basic laws of physics changed since then?
>
> No. Some times in real world things happen where basic law has
> difficulty to explain how and why.
> First thing I learned about generator when I was a kid was polarizing.
trim posts
Tony Hwang <dragon40@shaw.ca> wrote:
> jim beam wrote:
> > Tony Hwang wrote:
> >
> >> jim beam wrote:
> >>
> >>> Tony Hwang wrote:
> >>>
> >>>> jim beam wrote:
> >>>>
> >>>>> Tony Hwang wrote:
> >>>>>
> >>>>>> jim beam wrote:
> >>>>>>
> >>>>>>> Hachiroku wrote:
> >>>>>>> <snip crap>
> >>>>>>>
> >>>>>>>> I had heard of this before; I can't remember what the car was,
> >>>>>>>> but someone
> >>>>>>>> shorted out the ECU replacing the dome light...
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> no way - the ecu's not even connected to the dome light. and
> >>>>>>> they're electrically protected against all kinds of "user error",
> >>>>>>> including battery reversal, over-voltage, dead shorts and
> >>>>>>> static. short of direct lightning strike, water damage, or fire,
> >>>>>>> none of which have a single damned thing to do with dome lights,
> >>>>>>> the ecu's not going anywhere and it's /certainly/ not going to be
> >>>>>>> fubared by a bulb change.
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> Hi,
> >>>>>> No way? If short caused a surge in the electrical system,
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> short won't cause voltage surge. measure the voltage across a
> >>>>> battery as you increase current load - voltage goes down, not up.
> >>>>> only other potential source of surge is back emf from relays,
> >>>>> motors, etc, and they're all diode/condenser protected, as is the
> >>>>> ecu. bottom line: it's not the dome light.
> >>>>>
> >>>>>
> >>>>>> anything is possible.
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> yeah, it could have been hit by meteorite.
> >>>>>
> >>>>>> In cases like this mostly nothing serious happens but result
> >>>>>> unpredictable. Protection is not absolute 100%.
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> yeah, it could have been hit by meteorite.
> >>>>
> >>>>
> >>>> hmmm,
> >>>> Whatever you think. A car battery has lots of energy in it.
> >>>> Think current in this case.
> >>>
> >>>
> >>>
> >>> do what i said - measure voltage as a function of load. then report
> >>> your results.
> >>
> >> Hmmm,
> >> No, current as a function of load!
> >
> >
> > electrical current /is/ load...
> >
> > take any battery, then measure the voltage as you increase current load
> > on it. then let us know what happens. and how you think high current
> > [short] can cause a "surge".
> >
> >> Do you remember the days of generators under the automobile hoods?
> >
> >
> >
> > why? have any basic laws of physics changed since then?
>
> No. Some times in real world things happen where basic law has
> difficulty to explain how and why.
> First thing I learned about generator when I was a kid was polarizing.
trim posts
11-11-2007 | 12:59 PM
#21
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doingANYTHING!!!!
Tony Hwang wrote:
> jim beam wrote:
>> Tony Hwang wrote:
>>
>>> jim beam wrote:
>>>
>>>> Tony Hwang wrote:
>>>>
>>>>> jim beam wrote:
>>>>>
>>>>>> Tony Hwang wrote:
>>>>>>
>>>>>>> jim beam wrote:
>>>>>>>
>>>>>>>> Hachiroku wrote:
>>>>>>>> <snip crap>
>>>>>>>>
>>>>>>>>> I had heard of this before; I can't remember what the car was,
>>>>>>>>> but someone
>>>>>>>>> shorted out the ECU replacing the dome light...
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> no way - the ecu's not even connected to the dome light. and
>>>>>>>> they're electrically protected against all kinds of "user
>>>>>>>> error", including battery reversal, over-voltage, dead shorts
>>>>>>>> and static. short of direct lightning strike, water damage, or
>>>>>>>> fire, none of which have a single damned thing to do with dome
>>>>>>>> lights, the ecu's not going anywhere and it's /certainly/ not
>>>>>>>> going to be fubared by a bulb change.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Hi,
>>>>>>> No way? If short caused a surge in the electrical system,
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> short won't cause voltage surge. measure the voltage across a
>>>>>> battery as you increase current load - voltage goes down, not up.
>>>>>> only other potential source of surge is back emf from relays,
>>>>>> motors, etc, and they're all diode/condenser protected, as is the
>>>>>> ecu. bottom line: it's not the dome light.
>>>>>>
>>>>>>
>>>>>>> anything is possible.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> yeah, it could have been hit by meteorite.
>>>>>>
>>>>>>> In cases like this mostly nothing serious happens but result
>>>>>>> unpredictable. Protection is not absolute 100%.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> yeah, it could have been hit by meteorite.
>>>>>
>>>>>
>>>>> hmmm,
>>>>> Whatever you think. A car battery has lots of energy in it.
>>>>> Think current in this case.
>>>>
>>>>
>>>>
>>>> do what i said - measure voltage as a function of load. then report
>>>> your results.
>>>
>>> Hmmm,
>>> No, current as a function of load!
>>
>>
>> electrical current /is/ load...
>>
>> take any battery, then measure the voltage as you increase current
>> load on it. then let us know what happens. and how you think high
>> current [short] can cause a "surge".
>>
>>> Do you remember the days of generators under the automobile hoods?
>>
>>
>>
>> why? have any basic laws of physics changed since then?
>
> No. Some times in real world things happen where basic law has
> difficulty to explain how and why.
bull - that is a function of insufficient learning by the observer.
> First thing I learned about generator when I was a kid was polarizing.
polarizing is not surge!
> jim beam wrote:
>> Tony Hwang wrote:
>>
>>> jim beam wrote:
>>>
>>>> Tony Hwang wrote:
>>>>
>>>>> jim beam wrote:
>>>>>
>>>>>> Tony Hwang wrote:
>>>>>>
>>>>>>> jim beam wrote:
>>>>>>>
>>>>>>>> Hachiroku wrote:
>>>>>>>> <snip crap>
>>>>>>>>
>>>>>>>>> I had heard of this before; I can't remember what the car was,
>>>>>>>>> but someone
>>>>>>>>> shorted out the ECU replacing the dome light...
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> no way - the ecu's not even connected to the dome light. and
>>>>>>>> they're electrically protected against all kinds of "user
>>>>>>>> error", including battery reversal, over-voltage, dead shorts
>>>>>>>> and static. short of direct lightning strike, water damage, or
>>>>>>>> fire, none of which have a single damned thing to do with dome
>>>>>>>> lights, the ecu's not going anywhere and it's /certainly/ not
>>>>>>>> going to be fubared by a bulb change.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Hi,
>>>>>>> No way? If short caused a surge in the electrical system,
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> short won't cause voltage surge. measure the voltage across a
>>>>>> battery as you increase current load - voltage goes down, not up.
>>>>>> only other potential source of surge is back emf from relays,
>>>>>> motors, etc, and they're all diode/condenser protected, as is the
>>>>>> ecu. bottom line: it's not the dome light.
>>>>>>
>>>>>>
>>>>>>> anything is possible.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> yeah, it could have been hit by meteorite.
>>>>>>
>>>>>>> In cases like this mostly nothing serious happens but result
>>>>>>> unpredictable. Protection is not absolute 100%.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> yeah, it could have been hit by meteorite.
>>>>>
>>>>>
>>>>> hmmm,
>>>>> Whatever you think. A car battery has lots of energy in it.
>>>>> Think current in this case.
>>>>
>>>>
>>>>
>>>> do what i said - measure voltage as a function of load. then report
>>>> your results.
>>>
>>> Hmmm,
>>> No, current as a function of load!
>>
>>
>> electrical current /is/ load...
>>
>> take any battery, then measure the voltage as you increase current
>> load on it. then let us know what happens. and how you think high
>> current [short] can cause a "surge".
>>
>>> Do you remember the days of generators under the automobile hoods?
>>
>>
>>
>> why? have any basic laws of physics changed since then?
>
> No. Some times in real world things happen where basic law has
> difficulty to explain how and why.
bull - that is a function of insufficient learning by the observer.
> First thing I learned about generator when I was a kid was polarizing.
polarizing is not surge!
11-11-2007 | 01:24 PM
#22
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doing ANYTHING!!!!
On Sun, 11 Nov 2007 06:03:16 GMT, Tony Hwang <dragon40@shaw.ca> wrote:
>Mike wrote:
>> "Tony Hwang" <dragon40@shaw.ca> wrote in message
>> news:6DtZi.198872$th2.150458@pd7urf3no...
>>
>>>jim beam wrote:
>>>
>>>
>>>>Hachiroku wrote:
>>>><snip crap>
>>>>
>>>>>I had heard of this before; I can't remember what the car was, but
>>>>>someone
>>>>>shorted out the ECU replacing the dome light...
>>>>
>>>>
>>>>no way - the ecu's not even connected to the dome light. and they're
>>>>electrically protected against all kinds of "user error", including
>>>>battery reversal, over-voltage, dead shorts and static. short of direct
>>>>lightning strike, water damage, or fire, none of which have a single
>>>>damned thing to do with dome lights, the ecu's not going anywhere and
>>>>it's /certainly/ not going to be fubared by a bulb change.
>>>
>>>Hi,
>>>No way? If short caused a surge in the electrical system, anything is
>>>possible. In cases like this mostly nothing serious happens but result
>>>unpredictable. Protection is not absolute 100%.
>>
>>
>>
>> Bullshit!!
>>
>>
>Hmmm,
>Live little longer and gain some more experience!
It's still bullshit. Maybe you could make up a scenereo where someone
unhooked all the grounds from the ECU, removed it from its metal
support brakets and insulated it and then wired it directly to the
dome light circuit but supporting such myths as changing a dome light
bulb ed up an ECU is assanine.
--
gburnore at DataBasix dot Com
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>Mike wrote:
>> "Tony Hwang" <dragon40@shaw.ca> wrote in message
>> news:6DtZi.198872$th2.150458@pd7urf3no...
>>
>>>jim beam wrote:
>>>
>>>
>>>>Hachiroku wrote:
>>>><snip crap>
>>>>
>>>>>I had heard of this before; I can't remember what the car was, but
>>>>>someone
>>>>>shorted out the ECU replacing the dome light...
>>>>
>>>>
>>>>no way - the ecu's not even connected to the dome light. and they're
>>>>electrically protected against all kinds of "user error", including
>>>>battery reversal, over-voltage, dead shorts and static. short of direct
>>>>lightning strike, water damage, or fire, none of which have a single
>>>>damned thing to do with dome lights, the ecu's not going anywhere and
>>>>it's /certainly/ not going to be fubared by a bulb change.
>>>
>>>Hi,
>>>No way? If short caused a surge in the electrical system, anything is
>>>possible. In cases like this mostly nothing serious happens but result
>>>unpredictable. Protection is not absolute 100%.
>>
>>
>>
>> Bullshit!!
>>
>>
>Hmmm,
>Live little longer and gain some more experience!
It's still bullshit. Maybe you could make up a scenereo where someone
unhooked all the grounds from the ECU, removed it from its metal
support brakets and insulated it and then wired it directly to the
dome light circuit but supporting such myths as changing a dome light
bulb ed up an ECU is assanine.
--
gburnore at DataBasix dot Com
---------------------------------------------------------------------------
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================================================== =========================
11-11-2007 | 01:25 PM
#23
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doing ANYTHING!!!!
On Sun, 11 Nov 2007 07:19:19 GMT, Tony Hwang <dragon40@shaw.ca> wrote:
>jim beam wrote:
>> Tony Hwang wrote:
>>
>>> jim beam wrote:
>>>
>>>> Hachiroku wrote:
>>>> <snip crap>
>>>>
>>>>> I had heard of this before; I can't remember what the car was, but
>>>>> someone
>>>>> shorted out the ECU replacing the dome light...
>>>>
>>>>
>>>>
>>>> no way - the ecu's not even connected to the dome light. and they're
>>>> electrically protected against all kinds of "user error", including
>>>> battery reversal, over-voltage, dead shorts and static. short of
>>>> direct lightning strike, water damage, or fire, none of which have a
>>>> single damned thing to do with dome lights, the ecu's not going
>>>> anywhere and it's /certainly/ not going to be fubared by a bulb change.
>>>
>>> Hi,
>>> No way? If short caused a surge in the electrical system,
>>
>>
>> short won't cause voltage surge. measure the voltage across a battery
>> as you increase current load - voltage goes down, not up. only other
>> potential source of surge is back emf from relays, motors, etc, and
>> they're all diode/condenser protected, as is the ecu. bottom line: it's
>> not the dome light.
>>
>>
>>> anything is possible.
>>
>>
>> yeah, it could have been hit by meteorite.
>>
>>> In cases like this mostly nothing serious happens but result
>>> unpredictable. Protection is not absolute 100%.
>>
>>
>> yeah, it could have been hit by meteorite.
>hmmm,
>Whatever you think. A car battery has lots of energy in it.
A short won't cause a voltage surge.
>Think current in this case.
You might want to try starting with just plain thinking.
--
gburnore at DataBasix dot Com
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================================================== =========================
>jim beam wrote:
>> Tony Hwang wrote:
>>
>>> jim beam wrote:
>>>
>>>> Hachiroku wrote:
>>>> <snip crap>
>>>>
>>>>> I had heard of this before; I can't remember what the car was, but
>>>>> someone
>>>>> shorted out the ECU replacing the dome light...
>>>>
>>>>
>>>>
>>>> no way - the ecu's not even connected to the dome light. and they're
>>>> electrically protected against all kinds of "user error", including
>>>> battery reversal, over-voltage, dead shorts and static. short of
>>>> direct lightning strike, water damage, or fire, none of which have a
>>>> single damned thing to do with dome lights, the ecu's not going
>>>> anywhere and it's /certainly/ not going to be fubared by a bulb change.
>>>
>>> Hi,
>>> No way? If short caused a surge in the electrical system,
>>
>>
>> short won't cause voltage surge. measure the voltage across a battery
>> as you increase current load - voltage goes down, not up. only other
>> potential source of surge is back emf from relays, motors, etc, and
>> they're all diode/condenser protected, as is the ecu. bottom line: it's
>> not the dome light.
>>
>>
>>> anything is possible.
>>
>>
>> yeah, it could have been hit by meteorite.
>>
>>> In cases like this mostly nothing serious happens but result
>>> unpredictable. Protection is not absolute 100%.
>>
>>
>> yeah, it could have been hit by meteorite.
>hmmm,
>Whatever you think. A car battery has lots of energy in it.
A short won't cause a voltage surge.
>Think current in this case.
You might want to try starting with just plain thinking.
--
gburnore at DataBasix dot Com
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Black Helicopter Repair Services, Ltd.| Official Proof of Purchase
================================================== =========================
11-11-2007 | 01:26 PM
#24
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doing ANYTHING!!!!
On Sun, 11 Nov 2007 08:01:03 GMT, Tony Hwang <dragon40@shaw.ca> wrote:
>jim beam wrote:
>> Tony Hwang wrote:
>>
>>> jim beam wrote:
>>>
>>>> Tony Hwang wrote:
>>>>
>>>>> jim beam wrote:
>>>>>
>>>>>> Hachiroku wrote:
>>>>>> <snip crap>
>>>>>>
>>>>>>> I had heard of this before; I can't remember what the car was, but
>>>>>>> someone
>>>>>>> shorted out the ECU replacing the dome light...
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> no way - the ecu's not even connected to the dome light. and
>>>>>> they're electrically protected against all kinds of "user error",
>>>>>> including battery reversal, over-voltage, dead shorts and static.
>>>>>> short of direct lightning strike, water damage, or fire, none of
>>>>>> which have a single damned thing to do with dome lights, the ecu's
>>>>>> not going anywhere and it's /certainly/ not going to be fubared by
>>>>>> a bulb change.
>>>>>
>>>>>
>>>>> Hi,
>>>>> No way? If short caused a surge in the electrical system,
>>>>
>>>>
>>>>
>>>> short won't cause voltage surge. measure the voltage across a
>>>> battery as you increase current load - voltage goes down, not up.
>>>> only other potential source of surge is back emf from relays, motors,
>>>> etc, and they're all diode/condenser protected, as is the ecu.
>>>> bottom line: it's not the dome light.
>>>>
>>>>
>>>>> anything is possible.
>>>>
>>>>
>>>>
>>>> yeah, it could have been hit by meteorite.
>>>>
>>>>> In cases like this mostly nothing serious happens but result
>>>>> unpredictable. Protection is not absolute 100%.
>>>>
>>>>
>>>>
>>>> yeah, it could have been hit by meteorite.
>>>
>>> hmmm,
>>> Whatever you think. A car battery has lots of energy in it.
>>> Think current in this case.
>>
>>
>> do what i said - measure voltage as a function of load. then report
>> your results.
>Hmmm,
>No, current as a function of load! Do you remember the days of
>generators under the automobile hoods?
I do, and there weren't ECUs then. Basing your argument on something
that is now non-existant is very telling.
--
gburnore at DataBasix dot Com
---------------------------------------------------------------------------
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================================================== =========================
>jim beam wrote:
>> Tony Hwang wrote:
>>
>>> jim beam wrote:
>>>
>>>> Tony Hwang wrote:
>>>>
>>>>> jim beam wrote:
>>>>>
>>>>>> Hachiroku wrote:
>>>>>> <snip crap>
>>>>>>
>>>>>>> I had heard of this before; I can't remember what the car was, but
>>>>>>> someone
>>>>>>> shorted out the ECU replacing the dome light...
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> no way - the ecu's not even connected to the dome light. and
>>>>>> they're electrically protected against all kinds of "user error",
>>>>>> including battery reversal, over-voltage, dead shorts and static.
>>>>>> short of direct lightning strike, water damage, or fire, none of
>>>>>> which have a single damned thing to do with dome lights, the ecu's
>>>>>> not going anywhere and it's /certainly/ not going to be fubared by
>>>>>> a bulb change.
>>>>>
>>>>>
>>>>> Hi,
>>>>> No way? If short caused a surge in the electrical system,
>>>>
>>>>
>>>>
>>>> short won't cause voltage surge. measure the voltage across a
>>>> battery as you increase current load - voltage goes down, not up.
>>>> only other potential source of surge is back emf from relays, motors,
>>>> etc, and they're all diode/condenser protected, as is the ecu.
>>>> bottom line: it's not the dome light.
>>>>
>>>>
>>>>> anything is possible.
>>>>
>>>>
>>>>
>>>> yeah, it could have been hit by meteorite.
>>>>
>>>>> In cases like this mostly nothing serious happens but result
>>>>> unpredictable. Protection is not absolute 100%.
>>>>
>>>>
>>>>
>>>> yeah, it could have been hit by meteorite.
>>>
>>> hmmm,
>>> Whatever you think. A car battery has lots of energy in it.
>>> Think current in this case.
>>
>>
>> do what i said - measure voltage as a function of load. then report
>> your results.
>Hmmm,
>No, current as a function of load! Do you remember the days of
>generators under the automobile hoods?
I do, and there weren't ECUs then. Basing your argument on something
that is now non-existant is very telling.
--
gburnore at DataBasix dot Com
---------------------------------------------------------------------------
How you look depends on where you go.
---------------------------------------------------------------------------
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================================================== =========================
11-11-2007 | 01:28 PM
#25
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doing ANYTHING!!!!
On Sun, 11 Nov 2007 16:44:03 GMT, Tony Hwang <dragon40@shaw.ca> wrote:
>jim beam wrote:
>> Tony Hwang wrote:
>>
>>> jim beam wrote:
>>>
>>>> Tony Hwang wrote:
>>>>
>>>>> jim beam wrote:
>>>>>
>>>>>> Tony Hwang wrote:
>>>>>>
>>>>>>> jim beam wrote:
>>>>>>>
>>>>>>>> Hachiroku wrote:
>>>>>>>> <snip crap>
>>>>>>>>
>>>>>>>>> I had heard of this before; I can't remember what the car was,
>>>>>>>>> but someone
>>>>>>>>> shorted out the ECU replacing the dome light...
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> no way - the ecu's not even connected to the dome light. and
>>>>>>>> they're electrically protected against all kinds of "user error",
>>>>>>>> including battery reversal, over-voltage, dead shorts and
>>>>>>>> static. short of direct lightning strike, water damage, or fire,
>>>>>>>> none of which have a single damned thing to do with dome lights,
>>>>>>>> the ecu's not going anywhere and it's /certainly/ not going to be
>>>>>>>> fubared by a bulb change.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Hi,
>>>>>>> No way? If short caused a surge in the electrical system,
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> short won't cause voltage surge. measure the voltage across a
>>>>>> battery as you increase current load - voltage goes down, not up.
>>>>>> only other potential source of surge is back emf from relays,
>>>>>> motors, etc, and they're all diode/condenser protected, as is the
>>>>>> ecu. bottom line: it's not the dome light.
>>>>>>
>>>>>>
>>>>>>> anything is possible.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> yeah, it could have been hit by meteorite.
>>>>>>
>>>>>>> In cases like this mostly nothing serious happens but result
>>>>>>> unpredictable. Protection is not absolute 100%.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> yeah, it could have been hit by meteorite.
>>>>>
>>>>>
>>>>> hmmm,
>>>>> Whatever you think. A car battery has lots of energy in it.
>>>>> Think current in this case.
>>>>
>>>>
>>>>
>>>> do what i said - measure voltage as a function of load. then report
>>>> your results.
>>>
>>> Hmmm,
>>> No, current as a function of load!
>>
>>
>> electrical current /is/ load...
>>
>> take any battery, then measure the voltage as you increase current load
>> on it. then let us know what happens. and how you think high current
>> [short] can cause a "surge".
>>
>>> Do you remember the days of generators under the automobile hoods?
>>
>>
>>
>> why? have any basic laws of physics changed since then?
>
>No. Some times in real world things happen where basic law has
>difficulty to explain how and why.
>First thing I learned about generator when I was a kid was polarizing.
What does that have to do with a car that doesn't contain a generator?
What does that have to do with something supposedly related to a
battery?
Why aren't you answering his questions or providing results of the
tests that would prove your "surge" claim invalid?
--
gburnore at DataBasix dot Com
---------------------------------------------------------------------------
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================================================== =========================
>jim beam wrote:
>> Tony Hwang wrote:
>>
>>> jim beam wrote:
>>>
>>>> Tony Hwang wrote:
>>>>
>>>>> jim beam wrote:
>>>>>
>>>>>> Tony Hwang wrote:
>>>>>>
>>>>>>> jim beam wrote:
>>>>>>>
>>>>>>>> Hachiroku wrote:
>>>>>>>> <snip crap>
>>>>>>>>
>>>>>>>>> I had heard of this before; I can't remember what the car was,
>>>>>>>>> but someone
>>>>>>>>> shorted out the ECU replacing the dome light...
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> no way - the ecu's not even connected to the dome light. and
>>>>>>>> they're electrically protected against all kinds of "user error",
>>>>>>>> including battery reversal, over-voltage, dead shorts and
>>>>>>>> static. short of direct lightning strike, water damage, or fire,
>>>>>>>> none of which have a single damned thing to do with dome lights,
>>>>>>>> the ecu's not going anywhere and it's /certainly/ not going to be
>>>>>>>> fubared by a bulb change.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Hi,
>>>>>>> No way? If short caused a surge in the electrical system,
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> short won't cause voltage surge. measure the voltage across a
>>>>>> battery as you increase current load - voltage goes down, not up.
>>>>>> only other potential source of surge is back emf from relays,
>>>>>> motors, etc, and they're all diode/condenser protected, as is the
>>>>>> ecu. bottom line: it's not the dome light.
>>>>>>
>>>>>>
>>>>>>> anything is possible.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> yeah, it could have been hit by meteorite.
>>>>>>
>>>>>>> In cases like this mostly nothing serious happens but result
>>>>>>> unpredictable. Protection is not absolute 100%.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> yeah, it could have been hit by meteorite.
>>>>>
>>>>>
>>>>> hmmm,
>>>>> Whatever you think. A car battery has lots of energy in it.
>>>>> Think current in this case.
>>>>
>>>>
>>>>
>>>> do what i said - measure voltage as a function of load. then report
>>>> your results.
>>>
>>> Hmmm,
>>> No, current as a function of load!
>>
>>
>> electrical current /is/ load...
>>
>> take any battery, then measure the voltage as you increase current load
>> on it. then let us know what happens. and how you think high current
>> [short] can cause a "surge".
>>
>>> Do you remember the days of generators under the automobile hoods?
>>
>>
>>
>> why? have any basic laws of physics changed since then?
>
>No. Some times in real world things happen where basic law has
>difficulty to explain how and why.
>First thing I learned about generator when I was a kid was polarizing.
What does that have to do with a car that doesn't contain a generator?
What does that have to do with something supposedly related to a
battery?
Why aren't you answering his questions or providing results of the
tests that would prove your "surge" claim invalid?
--
gburnore at DataBasix dot Com
---------------------------------------------------------------------------
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================================================== =========================
11-11-2007 | 01:28 PM
#26
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doing ANYTHING!!!!
On Sun, 11 Nov 2007 12:23:01 -0500, "Elmo P. Shagnasty"
<elmop@nastydesigns.com> wrote:
>In article <njGZi.199132$Da.76434@pd7urf1no>,
> Tony Hwang <dragon40@shaw.ca> wrote:
>
>> jim beam wrote:
>> > Tony Hwang wrote:
>> >
>> >> jim beam wrote:
>> >>
>> >>> Tony Hwang wrote:
>> >>>
>> >>>> jim beam wrote:
>> >>>>
>> >>>>> Tony Hwang wrote:
>> >>>>>
>> >>>>>> jim beam wrote:
>> >>>>>>
>> >>>>>>> Hachiroku wrote:
>> >>>>>>> <snip crap>
>> >>>>>>>
>> >>>>>>>> I had heard of this before; I can't remember what the car was,
>> >>>>>>>> but someone
>> >>>>>>>> shorted out the ECU replacing the dome light...
>> >>>>>>>
>> >>>>>>>
>> >>>>>>>
>> >>>>>>>
>> >>>>>>>
>> >>>>>>> no way - the ecu's not even connected to the dome light. and
>> >>>>>>> they're electrically protected against all kinds of "user error",
>> >>>>>>> including battery reversal, over-voltage, dead shorts and
>> >>>>>>> static. short of direct lightning strike, water damage, or fire,
>> >>>>>>> none of which have a single damned thing to do with dome lights,
>> >>>>>>> the ecu's not going anywhere and it's /certainly/ not going to be
>> >>>>>>> fubared by a bulb change.
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>> Hi,
>> >>>>>> No way? If short caused a surge in the electrical system,
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>> short won't cause voltage surge. measure the voltage across a
>> >>>>> battery as you increase current load - voltage goes down, not up.
>> >>>>> only other potential source of surge is back emf from relays,
>> >>>>> motors, etc, and they're all diode/condenser protected, as is the
>> >>>>> ecu. bottom line: it's not the dome light.
>> >>>>>
>> >>>>>
>> >>>>>> anything is possible.
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>> yeah, it could have been hit by meteorite.
>> >>>>>
>> >>>>>> In cases like this mostly nothing serious happens but result
>> >>>>>> unpredictable. Protection is not absolute 100%.
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>> yeah, it could have been hit by meteorite.
>> >>>>
>> >>>>
>> >>>> hmmm,
>> >>>> Whatever you think. A car battery has lots of energy in it.
>> >>>> Think current in this case.
>> >>>
>> >>>
>> >>>
>> >>> do what i said - measure voltage as a function of load. then report
>> >>> your results.
>> >>
>> >> Hmmm,
>> >> No, current as a function of load!
>> >
>> >
>> > electrical current /is/ load...
>> >
>> > take any battery, then measure the voltage as you increase current load
>> > on it. then let us know what happens. and how you think high current
>> > [short] can cause a "surge".
>> >
>> >> Do you remember the days of generators under the automobile hoods?
>> >
>> >
>> >
>> > why? have any basic laws of physics changed since then?
>>
>> No. Some times in real world things happen where basic law has
>> difficulty to explain how and why.
>> First thing I learned about generator when I was a kid was polarizing.
>
>trim posts
ok.
--
gburnore at DataBasix dot Com
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<elmop@nastydesigns.com> wrote:
>In article <njGZi.199132$Da.76434@pd7urf1no>,
> Tony Hwang <dragon40@shaw.ca> wrote:
>
>> jim beam wrote:
>> > Tony Hwang wrote:
>> >
>> >> jim beam wrote:
>> >>
>> >>> Tony Hwang wrote:
>> >>>
>> >>>> jim beam wrote:
>> >>>>
>> >>>>> Tony Hwang wrote:
>> >>>>>
>> >>>>>> jim beam wrote:
>> >>>>>>
>> >>>>>>> Hachiroku wrote:
>> >>>>>>> <snip crap>
>> >>>>>>>
>> >>>>>>>> I had heard of this before; I can't remember what the car was,
>> >>>>>>>> but someone
>> >>>>>>>> shorted out the ECU replacing the dome light...
>> >>>>>>>
>> >>>>>>>
>> >>>>>>>
>> >>>>>>>
>> >>>>>>>
>> >>>>>>> no way - the ecu's not even connected to the dome light. and
>> >>>>>>> they're electrically protected against all kinds of "user error",
>> >>>>>>> including battery reversal, over-voltage, dead shorts and
>> >>>>>>> static. short of direct lightning strike, water damage, or fire,
>> >>>>>>> none of which have a single damned thing to do with dome lights,
>> >>>>>>> the ecu's not going anywhere and it's /certainly/ not going to be
>> >>>>>>> fubared by a bulb change.
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>> Hi,
>> >>>>>> No way? If short caused a surge in the electrical system,
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>> short won't cause voltage surge. measure the voltage across a
>> >>>>> battery as you increase current load - voltage goes down, not up.
>> >>>>> only other potential source of surge is back emf from relays,
>> >>>>> motors, etc, and they're all diode/condenser protected, as is the
>> >>>>> ecu. bottom line: it's not the dome light.
>> >>>>>
>> >>>>>
>> >>>>>> anything is possible.
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>> yeah, it could have been hit by meteorite.
>> >>>>>
>> >>>>>> In cases like this mostly nothing serious happens but result
>> >>>>>> unpredictable. Protection is not absolute 100%.
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>> yeah, it could have been hit by meteorite.
>> >>>>
>> >>>>
>> >>>> hmmm,
>> >>>> Whatever you think. A car battery has lots of energy in it.
>> >>>> Think current in this case.
>> >>>
>> >>>
>> >>>
>> >>> do what i said - measure voltage as a function of load. then report
>> >>> your results.
>> >>
>> >> Hmmm,
>> >> No, current as a function of load!
>> >
>> >
>> > electrical current /is/ load...
>> >
>> > take any battery, then measure the voltage as you increase current load
>> > on it. then let us know what happens. and how you think high current
>> > [short] can cause a "surge".
>> >
>> >> Do you remember the days of generators under the automobile hoods?
>> >
>> >
>> >
>> > why? have any basic laws of physics changed since then?
>>
>> No. Some times in real world things happen where basic law has
>> difficulty to explain how and why.
>> First thing I learned about generator when I was a kid was polarizing.
>
>trim posts
ok.
--
gburnore at DataBasix dot Com
---------------------------------------------------------------------------
How you look depends on where you go.
---------------------------------------------------------------------------
Gary L. Burnore | ÝÛ³ºÝ³Þ³ºÝ³³Ýۺݳ޳ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
| ÝÛ³ºÝ³Þ³ºÝ³³Ýۺݳ޳ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
Official .sig, Accept no substitutes. | ÝÛ³ºÝ³Þ³ºÝ³³Ýۺݳ޳ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
| ÝÛ 0 1 7 2 3 / Ý³Þ 3 7 4 9 3 0 Û³
Black Helicopter Repair Services, Ltd.| Official Proof of Purchase
================================================== =========================
11-11-2007 | 01:30 PM
#27
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doing ANYTHING!!!!
On Sun, 11 Nov 2007 02:17:38 GMT, Tony Hwang <dragon40@shaw.ca> wrote:
>jim beam wrote:
>
>> Hachiroku wrote:
>> <snip crap>
>>
>>> I had heard of this before; I can't remember what the car was, but
>>> someone
>>> shorted out the ECU replacing the dome light...
>>
>>
>> no way - the ecu's not even connected to the dome light. and they're
>> electrically protected against all kinds of "user error", including
>> battery reversal, over-voltage, dead shorts and static. short of direct
>> lightning strike, water damage, or fire, none of which have a single
>> damned thing to do with dome lights, the ecu's not going anywhere and
>> it's /certainly/ not going to be fubared by a bulb change.
>Hi,
>No way? If short caused a surge in the electrical system,
You're kidding right?
--
gburnore at DataBasix dot Com
---------------------------------------------------------------------------
How you look depends on where you go.
---------------------------------------------------------------------------
Gary L. Burnore | ÝÛ³ºÝ³Þ³ºÝ³³Ýۺݳ޳ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
| ÝÛ³ºÝ³Þ³ºÝ³³Ýۺݳ޳ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
Official .sig, Accept no substitutes. | ÝÛ³ºÝ³Þ³ºÝ³³Ýۺݳ޳ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
| ÝÛ 0 1 7 2 3 / Ý³Þ 3 7 4 9 3 0 Û³
Black Helicopter Repair Services, Ltd.| Official Proof of Purchase
================================================== =========================
>jim beam wrote:
>
>> Hachiroku wrote:
>> <snip crap>
>>
>>> I had heard of this before; I can't remember what the car was, but
>>> someone
>>> shorted out the ECU replacing the dome light...
>>
>>
>> no way - the ecu's not even connected to the dome light. and they're
>> electrically protected against all kinds of "user error", including
>> battery reversal, over-voltage, dead shorts and static. short of direct
>> lightning strike, water damage, or fire, none of which have a single
>> damned thing to do with dome lights, the ecu's not going anywhere and
>> it's /certainly/ not going to be fubared by a bulb change.
>Hi,
>No way? If short caused a surge in the electrical system,
You're kidding right?
--
gburnore at DataBasix dot Com
---------------------------------------------------------------------------
How you look depends on where you go.
---------------------------------------------------------------------------
Gary L. Burnore | ÝÛ³ºÝ³Þ³ºÝ³³Ýۺݳ޳ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
| ÝÛ³ºÝ³Þ³ºÝ³³Ýۺݳ޳ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
Official .sig, Accept no substitutes. | ÝÛ³ºÝ³Þ³ºÝ³³Ýۺݳ޳ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
| ÝÛ 0 1 7 2 3 / Ý³Þ 3 7 4 9 3 0 Û³
Black Helicopter Repair Services, Ltd.| Official Proof of Purchase
================================================== =========================
11-11-2007 | 01:49 PM
#28
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doing ANYTHING!!!!
In article <fh7hl0$qvl$5@blackhelicopter.databasix.com>,
Gary L. Burnore <gburnore@databasix.com> wrote very little but quoted
way, way, way too much.
As he always does, apparently. Gary L. Burnore doesn't know how to trim
posts.
Gary L. Burnore <gburnore@databasix.com> wrote very little but quoted
way, way, way too much.
As he always does, apparently. Gary L. Burnore doesn't know how to trim
posts.
11-11-2007 | 04:26 PM
#29
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doingANYTHING!!!!
Gary L. Burnore wrote:
> On Sun, 11 Nov 2007 02:17:38 GMT, Tony Hwang <dragon40@shaw.ca> wrote:
>
>
>>jim beam wrote:
>>
>>
>>>Hachiroku wrote:
>>><snip crap>
>>>
>>>>I had heard of this before; I can't remember what the car was, but
>>>>someone
>>>>shorted out the ECU replacing the dome light...
>>>
>>>
>>>no way - the ecu's not even connected to the dome light. and they're
>>>electrically protected against all kinds of "user error", including
>>>battery reversal, over-voltage, dead shorts and static. short of direct
>>>lightning strike, water damage, or fire, none of which have a single
>>>damned thing to do with dome lights, the ecu's not going anywhere and
>>>it's /certainly/ not going to be fubared by a bulb change.
>>
>>Hi,
>>No way? If short caused a surge in the electrical system,
>
>
> You're kidding right?
>
Hi,
Probably you don't even know basic Ohm's law or Kirchoff's or
Tevnin Norton's theorem, etc. If you want to debate, email me directly.
Let's compare our CV first.
> On Sun, 11 Nov 2007 02:17:38 GMT, Tony Hwang <dragon40@shaw.ca> wrote:
>
>
>>jim beam wrote:
>>
>>
>>>Hachiroku wrote:
>>><snip crap>
>>>
>>>>I had heard of this before; I can't remember what the car was, but
>>>>someone
>>>>shorted out the ECU replacing the dome light...
>>>
>>>
>>>no way - the ecu's not even connected to the dome light. and they're
>>>electrically protected against all kinds of "user error", including
>>>battery reversal, over-voltage, dead shorts and static. short of direct
>>>lightning strike, water damage, or fire, none of which have a single
>>>damned thing to do with dome lights, the ecu's not going anywhere and
>>>it's /certainly/ not going to be fubared by a bulb change.
>>
>>Hi,
>>No way? If short caused a surge in the electrical system,
>
>
> You're kidding right?
>
Hi,
Probably you don't even know basic Ohm's law or Kirchoff's or
Tevnin Norton's theorem, etc. If you want to debate, email me directly.
Let's compare our CV first.
11-11-2007 | 04:38 PM
#30
Guest
Posts: n/a
Re: Why you should remove the negative battery terminal before doingANYTHING!!!!
Tony Hwang wrote:
> Gary L. Burnore wrote:
>
>> On Sun, 11 Nov 2007 02:17:38 GMT, Tony Hwang <dragon40@shaw.ca> wrote:
>>
>>
>>> jim beam wrote:
>>>
>>>
>>>> Hachiroku wrote:
>>>> <snip crap>
>>>>
>>>>> I had heard of this before; I can't remember what the car was, but
>>>>> someone
>>>>> shorted out the ECU replacing the dome light...
>>>>
>>>>
>>>> no way - the ecu's not even connected to the dome light. and
>>>> they're electrically protected against all kinds of "user error",
>>>> including battery reversal, over-voltage, dead shorts and static.
>>>> short of direct lightning strike, water damage, or fire, none of
>>>> which have a single damned thing to do with dome lights, the ecu's
>>>> not going anywhere and it's /certainly/ not going to be fubared by a
>>>> bulb change.
>>>
>>> Hi,
>>> No way? If short caused a surge in the electrical system,
>>
>>
>> You're kidding right?
> Hi,
> Probably you don't even know basic Ohm's law or Kirchoff's or
> Tevnin Norton's theorem, etc. If you want to debate, email me directly.
> Let's compare our CV first.
tony, this is usenet - "credentials" don't mean . just stick to the
facts.
fact 1 - batteries don't "surge". period. some [reactive] peripherals
can do it, unless protected. in cars, they all are. dome lights are
not reactive.
fact 2 - ohmic behavior dictates that battery voltage drops as current
increases, not the other way around.
fact 3 - ecu's are "idiot proofed". per #1, a dome light has no
reaction that could possibly cause a problem, even if the ecu was
unprotected.
conclusion: either address reality or move on.
> Gary L. Burnore wrote:
>
>> On Sun, 11 Nov 2007 02:17:38 GMT, Tony Hwang <dragon40@shaw.ca> wrote:
>>
>>
>>> jim beam wrote:
>>>
>>>
>>>> Hachiroku wrote:
>>>> <snip crap>
>>>>
>>>>> I had heard of this before; I can't remember what the car was, but
>>>>> someone
>>>>> shorted out the ECU replacing the dome light...
>>>>
>>>>
>>>> no way - the ecu's not even connected to the dome light. and
>>>> they're electrically protected against all kinds of "user error",
>>>> including battery reversal, over-voltage, dead shorts and static.
>>>> short of direct lightning strike, water damage, or fire, none of
>>>> which have a single damned thing to do with dome lights, the ecu's
>>>> not going anywhere and it's /certainly/ not going to be fubared by a
>>>> bulb change.
>>>
>>> Hi,
>>> No way? If short caused a surge in the electrical system,
>>
>>
>> You're kidding right?
> Hi,
> Probably you don't even know basic Ohm's law or Kirchoff's or
> Tevnin Norton's theorem, etc. If you want to debate, email me directly.
> Let's compare our CV first.
tony, this is usenet - "credentials" don't mean . just stick to the
facts.
fact 1 - batteries don't "surge". period. some [reactive] peripherals
can do it, unless protected. in cars, they all are. dome lights are
not reactive.
fact 2 - ohmic behavior dictates that battery voltage drops as current
increases, not the other way around.
fact 3 - ecu's are "idiot proofed". per #1, a dome light has no
reaction that could possibly cause a problem, even if the ecu was
unprotected.
conclusion: either address reality or move on.