Does anybody happen to know how i would go about re-aiming my headlights because my driverside lamp low-beam is aimed up toward the traffic lights.

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1993 Bonneville SSE 97K
Stock engine for now
1993 Bonneville SE/SLE w/ 110K R.I.P.

The center screw is the height screw, and the side screw is the left-right screw.

Also, is the bulb installed correctly?

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2012 Chevrolet Cruze Eco - Current car

1999 Buick LeSabre Custom - Former car

Learn from the mistakes of others, that way when you mess up you can do so in new and interesting ways.

i believe so. ill check before i start with the screws.

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1993 Bonneville SSE 97K
Stock engine for now
1993 Bonneville SE/SLE w/ 110K R.I.P.

I would spray some penetrating lube like PB Blaster on the gearing because they like to freeze up. Tim

so i have a question... i just did the 90005 low beam mod... how exactly do you know when your headlights are correctly aimed? one is a little off but how do i know which one is right and which one is wrong?

cover on side up,see where its aimed and do the same for the other side i guess. then to correct it do like they said above if its the same way for your year

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1993 Bonneville SSE 97K
Stock engine for now
1993 Bonneville SE/SLE w/ 110K R.I.P.

how do you know which one to cover up and which one to adjust? one is aimed higher, but how do i know which one to adjust? (the left higher, or the right lower?)

Park your car on a level surface in front of a wall, at night preferably. Measure the distance from the middle of the headlight to the surface. Turn on your lights and measure the distance from the light beam on the wall to the surface, it should be a little lower than the headlight measurement; something like 1 inch lower for every 2 foot of distance from the wall (ie...10' length = 5"height).

Wikituneup.com says:

Park your Bonneville in front of a flat vertical surface, such as a closed garage door.

Turn on the headlights and prop open the hood.

Insert the head of the T15 bit into the top pin of the headlight assembly (or 1/4" socket wrench over it). Adjust the aim of the headlight until the two headlights have a 50 percent overlap.

Close the hood and reverse the Bonneville so that it is about 25 feet from the garage door.

Prop open the hood again and adjust the height of the headlights so that they hit where the ground meets the garage door.

I park the car at the curb on a dark area of the street in front of my house or go to a shopping center where the main drives are like a road. I cover one headlight with a white towel and adjust the other one so it's hitting down the road about 100 feet and then I move it up slightly to get further \coverage without losing light on near area. I do a left/right adjustment so the left area of the strong part of the beam is just to the right of the center--the strong part of the beam is not toward the oncoming driver.

I then switch the towel. I set the other light in a similar way.

My own technique is I gave the driver side a little more of a tweak to the right and gave it a little higher aim for seeing a deer or something in the road. But the main area of the beam is slightly more to the right so I don't blind oncoming drivers. I let the right beam be more on the road ahead rather than far away.

I drive the car and note if I am getting flashed by oncoming drivers meaning I'm off on one toward the oncoming car. I loved when a morning had a little fog so I could actually see the beam as it aimed out in front to judge if I had them where I wanted them.

Guys... This thread is over a decade old...

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-Car Guy Carl
"Penelope" - 2003 SLE - 247k Miles
"Sydney" - 2000 Honda S2000 - 98k miles