2015 Lincoln Navigator Owner Manual Printing 1 - Page 277

276 Maintenance ADJUSTING THE HEADLAMPS The headlamps on your vehicle are properly aimed at the assembly plant. If your vehicle has been in an accident, an authorized dealer should check the alignment of your headlamps. Vertical Aim Adjustment Before aim adjustment, disable the air suspension system. Refer to Message center in the Driver Controls chapter. 1. Park the vehicle directly in front of a wall or screen on a level surface, approximately 25 feet (7.6 meters) away. • (A) 8 feet (2.4 meters) A • (B) Center height of lamp to ground D • (C) 25 feet (7.6 meters) • (D) Horizontal reference line 2. Measure the height from the B center of your headlamp (indicated C by a 3.0 millimeter circle on the lens) to the ground and mark an 8 foot (2.4 meter) horizontal reference line on the vertical wall or screen at this height (a piece of masking tape works well). 3. Turn on the low beam headlamps to illuminate the wall or screen and open the hood. Cover one of the headlamps so no light from that lamp hits the wall. 4. On the wall or screen you will observe a light pattern with a distinct horizontal edge towards the right. If this edge is not at the horizontal reference line, the beam will need to be adjusted so the edge is at the same height as the horizontal reference line.