Hello all,

I looked under the hood and could not find exactly what I need to screw to make my headlight aim higher on my '93 Lexus LS400. Could anyone give me advice on which screw I am looking for on both the driver and passenger side headlights? Thank you.

 

Hi dataDave,

I was curious earlier this year about doing the same procedure on my 1991 LS 400. The process is the same for any 1990-1994 LS models. Just make sure that your headlamps are not too high, or they can blind other drivers [see video tutorial at bottom of page].

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To adjust the horizontal aiming of your headlight, you can remove the radiator core support hole plug, which will expose the A-bolt (see below diagram):


The hole plug in the radiator core support looks like this:




To remove this plug, simply slide your fingers under the outer edge, squeeze it slightly, and pull upward. This does not need to be removed, because the slots in it will allow you to pass a screwdriver through, but removing it may aid in determining the exact location of the A-bolt adjustment screw.

Once this is removed, you will see the horizontal adjustment screw (A-bolt) for your headlight:



Turning the A-bolt clockwise or counterclockwise will adjust the beam horizontally (left or right).
[I did not notice a change in the beam pattern when I turned the A-bolt. If you notice which way the light moves when the screw is turned clockwise, please reply to this post]

The B-bolt adjusts the headlight aiming vertically. Turning the B-bolt clockwise will move the entire headlight and the beam upward, and turning the bolt counterclockwise will move the headlight down.

NOTE: It will take several turns in order to begin to notice a difference in beam pattern aiming and/or actual movement in the lens. If you don't see any changes after about 10 or more turns of your screwdriver, the adjustment gear might be stuck or broken. You can keep trying to turn it, to see if it changes. Do not rush this process, or you may strip the gears. You may hear some slight rubbing when rotating the B-bolt.

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Thank you Celsi0r. Been meaning to adjust mine for awhile now but haven't looked into it until now. Seems pretty simple and straight forward so I'll give it a go tonight.