My 2006 Sonata's headlights will dim on low beam for a second or two,
then return to their normal brightness. This happens while driving at
night (duh! it's more noticable), I tend to notice it the most when
the car is downshifting from 2nd to 1st. Any ideas?

 

Alternator perhaps.

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<mbleisch@gmail.com> wrote in message
news:9869701e-9e9b-4a0f-b1b7-d41855f83430@d77g2000hsb.googlegroups.com...
> My 2006 Sonata's headlights will dim on low beam for a second or two,
> then return to their normal brightness. This happens while driving at
> night (duh! it's more noticable), I tend to notice it the most when
> the car is downshifting from 2nd to 1st. Any ideas?

Mine does the same thing. I had not paid attention to what gear(s) it
appeared to happen in, I had only noticed that when I slowed to make a turn
such as off the road into my driveway, it would occur. I have not
investigated this at all, but I do see it in my 06.

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-Mike-
mmarlowREMOVE@alltel.net

 

"phillystyle" <sub3@hotmail.com> ha scritto nel messaggio
news:96826bcb0d069561492dbba9da593b6b@localhost.ta lkaboutautos.com...
> Alternator perhaps.
>
> --

Yes, but it does not necessarily mean it is a problem. My Sonata MY2002 made
the same and there was a TSB describing this as "normal" behaviour of
alternator regulation circuits.
Anway, you could verify if battery connectors are tight.


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Zotto Sonica barbonica driver
http://www.flickr.com/photos/zottoida/

 

"Zotto" <zottononmispammare@inwind.it> wrote in message
news:6y2kk.125627$FR.391722@twister1.libero.it...
>
> "phillystyle" <sub3@hotmail.com> ha scritto nel messaggio
> news:96826bcb0d069561492dbba9da593b6b@localhost.ta lkaboutautos.com...
>> Alternator perhaps.
>>
>> --
>
> Yes, but it does not necessarily mean it is a problem. My Sonata MY2002
> made the same and there was a TSB describing this as "normal" behaviour of
> alternator regulation circuits.
> Anway, you could verify if battery connectors are tight.
>

Nope - not a battery connection problem. Not even symptomatic of one. I've
chocked it up to just a nuance of the car.

--

-Mike-
mmarlowREMOVE@alltel.net

 

I recently worked on an Azera that did this. Verified that system voltage
basically dropped to battery voltage (no alternator contribution) when
this occurred. Seemed to occur off gas, but not necessarily at low
speeds. Put an alternator on; owner reports no change.

Hyundai recommends checking battery cable voltage drops, junction block
connections, and ground lugs. Customer has yet to return for further
checking.

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