TM 9-2320-387-24-l 4-49. SERVICE HEADLIGHT LAMP MAINTENANCE (Cont’d) c. Adjustment 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. NOTE Headlamp alignment is basically the same for both headlamps. Inflate tires on vehicle before starting procedure. (Refer to TM 9-2320-387-10.) Measured height (H) varies depending on model of vehicle and load configuration. Position vehicle on level ground 25 ft. from and facing a vertical wall. Measure height (H) from ground up to center of headlamp (3). Using chalk, draw a horizontal line across vertical wall at center height (H) of headlamp. Draw a vertical line through horizontal line for center position (C) of vehicle. Measure distance from center to center of headlamp (D) and divide measurement in half. Draw two vertical lines (D) at equal distance from center position line CC). Measure down one-twelfth from horizontal line (H) and mark horizontal lines through headlamp vertical lines CD). Turn headlamps on low beam and block out one headlamp. Adjust headlamp (3) using vertical adjusting screw (8) and/or horizontal adjusting screw (9) until center of headlamp beam is aligned with lower horizontal and vertical lines. Repeat steps 8 and 9 for other headlamp. 25 __ 8 9 FOLLOW-ON TASK: Check headlight lamp for proper operation (TM 9-2320-387-10). 4-83
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