The headlights must be aimed correctly. If adjusted incorrectly, they could blind the driver of an oncoming vehicle and cause a serious accident or seriously reduce your ability to see the road. The headlights should be checked for correct aim every 12 months and any time a new headlight is installed or front-end bodywork is performed. It should be emphasized that the following procedure is only an interim step that will provide temporary adjustment until the headlights can be adjusted by a properly equipped shop. The vertical adjuster is located on the backside of each headlight housing. Use a Phillips screwdriver to turn the adjuster. These headlights are not equipped with horizontal adjusters. There are several methods for adjusting the headlights. The simplest method requires masking tape, a blank wall, and a level floor. Position masking tape vertically on the wall in relation to the vehicle centerline and in relation to the centerlines of both headlights. Position a horizontal tape line in reference to the centerline of all the headlights. It might be easier to position the tape on the wall with the vehicle parked only a few inches away. Adjustment should be made with the vehicle parked 25 feet from the wall, sitting level, the gas tank half-full, and no heavy load in the vehicle. With the low beams turned on, position the high-intensity zone so it is two inches below the horizontal line.