2006 Sonata headlights dim while driving

Discussion in 'Hyundai Sonata' started by mbleisch, Jul 30, 2008.

  1. mbleisch

    mbleisch Guest

    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?
    mbleisch, Jul 30, 2008
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  2. mbleisch

    phillystyle Guest

    Alternator perhaps
    phillystyle, Jul 30, 2008
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  3. mbleisch

    Mike Marlow Guest

    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.
    Mike Marlow, Jul 30, 2008
  4. mbleisch

    Zotto Guest

    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.
    Zotto, Jul 30, 2008
  5. mbleisch

    Mike Marlow Guest

    Nope - not a battery connection problem. Not even symptomatic of one. I've
    chocked it up to just a nuance of the car.
    Mike Marlow, Jul 30, 2008
  6. mbleisch

    hyundaitech Guest

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

    Hyundai recommends checking battery cable voltage drops, junction bloc
    connections, and ground lugs. Customer has yet to return for furthe
    hyundaitech, Aug 1, 2008
  7. mbleisch

    Erin B

    Dec 31, 2012
    Likes Received:
    Have the same problem dealer could notified fix?
    Erin B, Dec 31, 2012
  8. mbleisch


    Mar 6, 2013
    Likes Received:
    OMG there are many member who have the same problem.. Have anyone replaced the head light unit ! because it may be due to the poor head light. But as you are saying its new then it don't should do this. Anyhow I am trying to find some solution for that. guys just stay here I will reply the solution soon.
    Last edited: Sep 26, 2014
    Caleb, Mar 7, 2013
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