Headlamp Aiming? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 10-21-2007, 10:43 PM   #1
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Default Headlamp Aiming?

Ok, my headlights are crooked as hell. I am not really sure how to adjust them properly, and the service manual doesn't help too much. So anyone have a good guide on how to adjust them? Thanks!

(BTW, I do have a tape measure so I can measure what I need to.)

EDIT - Thanks for moving it. I thought I put in in 92-99, guess I didn't.
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Old 10-21-2007, 11:12 PM   #2
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Hmm.... All the Service manual says is to obtain a aiming kit, and the instructions are enclosed.
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Old 10-21-2007, 11:14 PM   #3
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Check this out:

http://www.automedia.com/Aiming/Head...cr20010801ha/1

I used that guide to aim mine.

There should be two screws coming from the top of the headlight units, one adjusts vertical, the other horizontal. They are star-drive if I remember right.....
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Old 10-21-2007, 11:20 PM   #4
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and just to give you a heads up....
sense your in snow state... i bet that your adjusters might be frozen..

so if they dont want to turn easy at first, put some oil down in then and they should start to move... if not.. time for new adjuster brackets.
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Old 10-21-2007, 11:21 PM   #5
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Any headlights that aren't marked VOL or VOR are not visually aimable.

At least that'* what the DOT tells us.

But, you should probably read up here:

http://danielsternlighting.com/tech/aim/aim.html

Daniel Stern is the best place for headlight info.

Oh, and PLEASE everyone read up on those blue headlight bulbs, including silverstars.

Bandit'* HIR bulbs are the best choice for your cars without going HID (projectors, not a drop-in kit).
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Old 10-21-2007, 11:21 PM   #6
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No they aren't frozen, car is from a salt free state.

But, I am being told to park the car 25 feet from the wall (bumper to wall, and adjust them to be 18" off the ground. Sound correct? If so, I am going now to adjust them.
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Old 10-21-2007, 11:27 PM   #7
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A bit more detail (and maybe a bit more confusing ) is listed here. Headlamp Adjustment It'* basically the same procedure, however.
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Old 10-21-2007, 11:52 PM   #8
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Yes, your specs are correct from what I remember, as I said, I just used that link I sent you and it came out quite well. Just make sure also you are on a level surface, I went 25 feet from the garage door as you see in that picture and made the markings just as they did.
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Old 10-21-2007, 11:56 PM   #9
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you know what the funny thing is.. iv never used anything like that before.. i just do trail and error and i get it right after 2 or 3 trys.

i like mine aimed a little diffrent anyway to give me better low beam view for side of the road for those Big Rats called "Deer"
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Old 10-22-2007, 02:56 AM   #10
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Easiest way is to adjust them at night on a long flat level section of unused highway with painted lines.
My 1990 has "star" bolt heads on the adjusters, but a 1/4" hex nut driver fits perfectly. I think the star is to scare off the newbies and keep them from aiming their lights annoyingly high.
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