Headlamp: Adjustments
HEADLAMP UNIT ADJUSTMENTHeadlamp Alignment Screen:
A. Lamp Alignment Screen Preparation
1. Position vehicle on a level surface perpendicular to a flat wall 7.62 meters (25 ft) away from front of headlamp lens.
2. If necessary, tape a line on the floor 7.62 meters (25 ft) away from and parallel to the wall.
3. Up 1.27 meters (5 feet) from the floor, tape a line on the wall at the centerline of the vehicle. Sight along the centerline of the vehicle (from rear of vehicle forward) to verify accuracy of the line placement.
4. Rock vehicle side-to-side three times to allow suspension to stabilize.
5. Jounce front suspension three times by pushing downward on front bumper and releasing.
6. Measure the distance from the center of headlamp lens to the floor. Transfer measurement to the alignment screen (with tape). Use this line for up/down adjustment reference.
7. Measure distance from the centerline of the vehicle to the center of each headlamp being aligned. Transfer measurements to screen (with tape) to each side of vehicle centerline. Use these lines for left/right adjustment reference.
B. Vehicle Preparation For Headlamp Alignment
1. Verify headlamp dimmer switch and high beam indicator operation.
2. Verify headlamps are set for low beam operation.
3. Correct defective components that could hinder proper headlamp alignment.
4. Verify proper tire inflation.
5. Clean headlamp lenses.
6. Verify that luggage area is not heavily loaded.
7. Fuel tank should be FULL. Add 2.94 kg (6.5 lbs.) of weight over the fuel tank for each estimated gallon of missing fuel.
C. Headlamp Adjustment
* Headlamps can be aligned using the screen method provided or alignment tool C-4466-A or equivalent can be used. refer to the instructions provided with the tool for proper procedures.
* A properly aimed low beam headlamp will project top edge of high intensity pattern on screen from 50 mm (2 in.) above to 50 mm (2 in.) below headlamp centerline. The side-to-side outboard edge of high intensity pattern should be from 50 mm (2 in.) left to 50 mm (2 in.) right of headlamp centerline.
* The preferred headlamp alignment is 1" down for the up/down adjustment and 0 for the left/right adjustment. The high beam pattern should be correct when the low beams are aligned properly.
Fig. 21 Aero Headlamp Alignment:
* To adjust headlamp aim, rotate alignment screws to achieve the specified high intensity pattern.