Adjusting Headlights
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Thread: Adjusting Headlights

  1. #1
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    Adjusting Headlights

    Tonight was the first time driving my Cruze after dark. Something seemed a little off with the headlights during twilight, so with the help of a family friend I did an impromptu alignment. At 25 feet from the front bumper the cutoff from the headlights was raised by approximately 4", or ~2 full turns of the adjuster bolt (8mm head) Driving later, the headlights performed very nicely, with a good throw and excellent illumination on low beam. The high beams weren't that great, so I'll back off the lights by 1/4 turn, for a total of 1.75 turns of the adjuster.

    Our Honda with its 9003/H4 headlights needed the exact same thing done to it right after delivery, so this wasn't my first time adjusting single-bulb headlight systems.

    If your stock headlights are annoying you with their lack of illumination, try adjusting them up by 1.5 complete turns. The results may surprise you.
    Last edited by sciphi; 08-27-2011 at 11:13 PM.
    2012 Chevrolet Cruze Eco
    2009 Honda Fit Sport

    Learn from the mistakes of others, so when you err it can be in new and interesting ways.

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  3. #2
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    Bumping this after adjustment and driving. I ended up adjusting the headlights up ~1.5 turns from stock and putting in some slightly nicer headlight bulbs. The result was a much improved low beam, with much improved throw down the road.
    2012 Chevrolet Cruze Eco
    2009 Honda Fit Sport

    Learn from the mistakes of others, so when you err it can be in new and interesting ways.

  4. #3
    Off-Road Champion Patman's Avatar
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    Good thing I saw this post. I was considering new lights etc. I adjusted my headlights and as the blind man says: "I can see!!!!!" I thought my night time vision was getting worse since I bought this car! Not I adjusted the lights I can see at night again!


    Thx.

  5. #4
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    Welcome! Glad to hear it helped you out!
    2012 Chevrolet Cruze Eco
    2009 Honda Fit Sport

    Learn from the mistakes of others, so when you err it can be in new and interesting ways.

  6. #5
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    Quote Originally Posted by Patman View Post
    Good thing I saw this post. I was considering new lights etc. I adjusted my headlights and as the blind man says: "I can see!!!!!" I thought my night time vision was getting worse since I bought this car! Not I adjusted the lights I can see at night again!


    Thx.
    I recently had the chance to drive my wife's LT 1 at night; felt the same as you about the low beams; where is the " adjustment screw/bolt"..............Thanks-in-advance

  7. #6
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    It's the only white wheel on the backside of the headlights. An 8mm wrench or socket fits perfectly on it.
    2012 Chevrolet Cruze Eco
    2009 Honda Fit Sport

    Learn from the mistakes of others, so when you err it can be in new and interesting ways.

  8. #7
    Handbrake Released
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    So, from 25ft what height is the cutoff at? Before and after.

  9. #8
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    Quote Originally Posted by sciphi View Post
    It's the only white wheel on the backside of the headlights. An 8mm wrench or socket fits perfectly on it.
    Thanks....

  10. #9
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    Quote Originally Posted by EcoCruzer View Post
    So, from 25ft what height is the cutoff at? Before and after.
    IIRC the cutoff was 22" from the factory. It should be about 23.5" to 24" after everything is said and done.
    2012 Chevrolet Cruze Eco
    2009 Honda Fit Sport

    Learn from the mistakes of others, so when you err it can be in new and interesting ways.

  11. #10
    Learning about my Cruze
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    To aim them properly you need to measure to the center of the headlight (where the bulb sits) to the ground. Then at 25" away measure the center of the headlight beam on a wall to the ground. The center of the beam should be 2" or so lower than the distance from the ground to the bulb to avoid blinding oncoming traffic.
    Starks8 likes this.
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