You are watching: How to adjust honda civic headlights

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It seems there is alot of mystery about this subject, and I get asked all the time how it should be done so that other drivers don"t flash you all the time. Well this will be the most simple way of doing it, enough to get you safe on the road. tools needed: large, thick, dark towela friendsmall toolkit with basic sockets and screwdriversmeasuring device such as meter sticka white wall and flat ground Okay let"s get started. Now this diy was written using TYC projector headlights, but the same applies to oem with a few changes. If you are aiming tyc, then you will need to remove the bumper and also the headlight assembly to aim them. There is just not enough room otherwise. Now lets take a look at the headlights. On the actual plastic lens, you should have a small square or circle engraved into the plastic at the center of the low beam (and hi beam on projector housing). I have this area marked with a large circle.
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Now what you want to do is take your measuring device and find out how far it is from the center of the dot to the ground. I provided a sample measurement. Yours will be different! Remember this number.
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Make sure it is completely dark outside, then drive to your safe area that has a white wall and plenty of space. You need to park your car on level ground 25 feet away from the wall. measure with your feet or measuring device. turn on your lights, lol. you should now have a clear view of the beam pattern. If you have projectors, the cutoff line will be very distinct. there will be bright light underneath, and darkness above. if you have halogen reflectors like stock headlight, the cutoff will not be as sharp, but you should still be able to pick a point where there is a defined area between light and dark. there will be some glare above the cutoff due to the nature of the reflector. now as for aiming the actual light beam, the tyc headlights have two screws on the back. more than likely you will need to remove the headlight itself everytime you make an adjustment. one screw is for left/right, another for up/down. If you have stock headlights, there is a gear for up/down aiming. sedans have a left/right, but you should not need to adjust this anyway. on the stock headlights, this is the gear. Hint: it can be turned very easily with a thin, long screwdriver from above as indicated by the upper arrow. This allows for adjustment without removing the bumper or headlight assembly.
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Remember the measurement you made from the center of the headlight to the floor? go to the wall and measure this same distance from the floor up and make a small circle mark. your headlight beam cutoff might be above or below this mark. What you want to do is move the headlight beam so that the cutoff is 2.1 inches below the mark that you made on the wall. this is the correct distance.
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Note: you must aim headlights one at a time. before you start, have a friend sit in the driver seat. first cover one headlight with a towel so that the light is blocked. aim the other headlight until the beam is 2.1 inches below the mark. repeat for the second headlight while covering up the first. When you are done, both cutoff lines should be at the same level as seen above.

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That"s it! If you want to check both cutoff lines separately, you can move the car closer to the wall.
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