Aiming the Headlamps

Headlamp Adjusting Screws:

Tool Required:
J 25300-B Headlamp Aiming Kit
The headlamps must be properly aimed in order to obtain the maximum road illumination and safety that has been built into the headlamp system. With halogen headlamps, proper aiming is very important. Because of the increased range and power of these lamps, even slight variations from recommended aiming can be hazardous to approaching motorists. Composite headlamps, however, do not require aiming if only the bulb has been replaced.

When checking or adjusting headlamp aim, observe the following conditions:
^ The vehicle must be on a level surface.
^ Tires must be uniformly inflated to specified pressure. Refer to the tire placard located on the rear of the left-door frame for tire pressure specifications.
^ If the vehicle will regularly tow a trailer or carry an unusual load in the rear these loads should be on the vehicle when headlamps are checked.
^ Clean headlamps before aiming.
^ All states have requirements for headlamp aiming that must be followed.

The J 25300-B is designed to accommodate all composite and sealed beam headlamps in any standard shape or size and in any configuration. Different lamp shapes and sizes are accommodated through the use of adapters provided in the kit. Regardless of configuration, headlamps are always aimed in pairs.

The mounting and adjustment instructions are included in the J 25300-B.

1. The universal aimer should be used on a known level floor or calibrated for floor slope.
2. Select and assemble the universal adapter that matches the aiming pad pattern on the lens of the headlamp.
3. Align the selected adapter to the aiming pads.
Move the adjustment rod for each pad until it agrees with the adjustment rod setting number located on the headlamp. On some lamps the numbers are located along the lower edge or the vertical edge of the lens.
4. To adjust the rods to the required position, turn them to the neutral position and slide the rods in or out to the proper setting.
5. Attach adapters making certain that the correct adapter issued with the correct side aimer.
6. Place the aimers with adapters onto their respective sides making certain all adjustment rods and the articulating suction cup are contacting the aiming pads. It may he necessary to add or remove extension studs.
7. Aim headlamps according to the instructions included in J 25300-B.
^ To adjust horizontal aim: Turn horizontal headlamp adjusting screw.
^ To adjust vertical aim: Turn vertical headlamp adjusting screw.