2002 Cadillac DeVille Owner's Manual - Page 351

The vehicle should be properly prepared as follows: D The vehicle should be placed so the headlamps are 25 ft. (7.6 m) from a light colored wall or other flat surface. level surface which is level all the way to the wall or other flat surface. the wall or other flat surface. attached to it. D The vehicle must have all four tires on a perfectly D The vehicle should be placed so it is perpendicular to D The vehicle should not have any snow, ice or mud D The vehicle should be fully assembled and all other D The vehicle should be normally loaded with a full D Tires should be properly inflated. Headlamp aiming is done with the vehicle low beam lamps. The high beam lamps will be correctly aimed if the low beam lamps are aimed properly. The headlamp aiming devices are under the hood near the headlamps. work stopped while headlamp aiming is being done. tank of fuel and one person or 160 lbs. (75 kg) on the driver's seat. If you believe your headlamps need horizontal (left/right) adjustment, follow the horizontal aiming procedure. If you believe your headlamps need only vertical (up/down) adjustment, follow only the vertical aiming procedure. Adjustment screws can be turned with an E8 TorxR socket or T15 Torx screwdriver. 6-41