Depending on the year of the Cadillac being worked on, the adjustment screws to aim the headlights will be either on the front of the headlight or under the hood, facing down. In any event there will be two screws: one to adjust the vertical plane and one to adjust the horizontal plane. If the screws are in the front, they can be seen very close to the headlight--one at the 12 o'clock position and one at the 3 or 9 o'clock position. The top one is for vertical adjustment and the other for horizontal adjustment. If the screws are under the hood, once again the top is for vertical and the side for horizontal adjustment.
Locate the adjustment screws for the headlights. Pull the car up to a wall or garage door so that the nose of the car is no more than 3 feet from the surface chosen. Turn the headlights on high beam.
Place a piece of tape on the wall to designate the center of the grill or front of the car. Place it level with the hood. Place a piece of tape on the wall to represent dead center on each headlight--not the beam but the headlight itself.
Back the car up 15 to 20 feet. Adjust the driver's side headlight, using the Phillips screwdriver to adjust the screws, so that the beam is two inches to the right of, and two inches below the tape.
Adjust the passenger side headlight in the same manner, except aim it two inches to the right of the tape and one inch below the tape.
