§ 661. Aiming Adjustment Test.

Housings for sealed and semisealed optical units, and complete assemblies for roadlighting equipment, such as driving, fog, and passing lamps, shall comply with the following aiming adjustment requirements:

(a) Adjustment Range. The range of adjustment from the specified aim for the lamp shall be at least ±4 deg in both the vertical and horizontal directions. Fog lamps designed as original equipment for a specific vehicle model need have the specified range of adjustment in the vertical direction only.

(b) Aiming Deviation. The vertical aim of lamps with independent vertical and horizontal aiming adjustment shall not deviate more than a total of 10 cm (4.0 in.) at a distance of 7.6 m (25 ft) from the lens, when the horizontal aim is adjusted through an angle of ±4 deg from the correct aim specified in this title. The same requirement shall apply to deviation of horizontal aim when the vertical aim is adjusted. Original equipment fog lamps with only a vertical aim adjustment shall not exceed the specified horizontal deviation when the vertical aim is adjusted through the required angle. This requirement does not apply to ball-and-socket or equivalent adjusting means.

(c) Self-Locking Device. Self-locking devices which hold aiming screws in position shall operate satisfactorily for 10 adjustments on each screw over a thread length of 3.0 mm (0.12 in.) inward to outward from the correct aim. This requirement does not apply to ball-and-socket or equivalent adjusting means.

HISTORY

1. Amendment of subsections (a) and (b) filed 12-17-81; effective thirtieth day thereafter (Register 81, No. 51).

Note

Note: Authority cited: Section 26103, Vehicle Code. Reference: Sections 24012 and 26103, Vehicle Code.