11.14.05.09

.09 Lighting.

General Lamp and Reflector Inspection. This includes all original equipment, exterior lighting plus whatever lights are authorized. (For definitions of lighting terms, refer to COMAR 11.14.04.12E and F.) Pole trailers and modular home trailers may have portable lamp devices which attach to the load when in use to comply with applicable regulations.

Procedures: Reject Vehicle If:
A. Visual Inspection of Lamp Function. Connect trailer or semitrailer to power source of towing vehicle. Turn on night driving lights of towing vehicle and visually inspect the following: A.
(1) A required lamp is missing or fails to function.
(2) Turn signals do not properly indicate right or left when so activated.
(1) Actuate the turn signal lever of the towing vehicle to right and left; and observe function of turn signal lights of trailer or semitrailer (1962 or newer trailers, semitrailers, and pole trailers shall be so equipped). Turn signals shall emit red or amber light. (3) Any lamp shows color contrary to law (red or blue light to the front; white light to the rear, except license plate lamp).
(4) A required lamp, lens, or reflector is obscured by any object or shielded by a nontransparent material.
(2) Depress the brake pedal of the towing vehicle and observe the function of the stop lamps of the trailer or semitrailer (1972 or newer trailers, semitrailers, and
pole trailers shall have two red or amber stop lamps, all others one).
(5) A lamp or reflector is not mounted to properly direct or reflect light.
(6) A lamp assembly or reflector is loose or improperly mounted.
(3) Observe function of tail lamps of trailer or semitrailer (Red: two on 1972 or newer vehicles; all others, one). (7) A tail lamp, stop lamp, or turn signal has a cracked or broken lens which emits a white light to the rear.
(8) A lamp, lens, or reflector is not an approved type.
(4) Observe function of license plate lamp of trailer or semitrailer (White: May be incorporated in tail lamp).  
(5) 1972 and newer model trailers and semitrailers shall be equipped with two red reflectors on the rear. All others, one. (Reflectors may be incorporated in tail lamps.) In addition, every trailer or semitrailer 80 inches or more in overall width shall be, and all other trailers or semitrailers may be, equipped as required in žA(6),(7), (8), and (9).  
(6) Side marker lamps: One amber, front, and one red, rear, on each side. Vehicles over 30 feet in overall length, one amber, centrally located with respect to length of the vehicle.  
(7) Reflectors: One amber, front, and one red, rear, on each side. Vehicles over 30 feet in overall length, one amber, centrally located with respect to the length of the vehicle. (Reflectors may be incorporated in side marker lamps.)  
(8) Clearance Lamps: Two amber, front, and two red, rear, to indicate the overall width of the vehicle. One on each side of the vertical centerline of the vehicle at the same height and as near the top of the vehicle as possible. If the vehicle is equipped with three red identification lamps on the top rear, the rear clearance lamps may be mounted at the top or bottom of the vehicle.  
(9) Identification Lamps: (Required on 1972 or newer trailers and semitrailers). Three red, rear, grouped in a horizontal row with lamp centers spaced not less than 6 inches or more than 12 inches apart and mounted on a permanent structure of the vehicle as close as possible to the vertical centerline of the vehicle. Pole trailers may be equipped with three red identification lamps visible to the rear, mounted on the rear of the cab of the towing vehicle, the bolster, or on the rear of the load provided they are visible.  
(10) Modular home trailers may be equipped with a bar light assembly provided it is bolted securely to the rear frame of the trailer.  

Figures 6—COMMERCIAL SEMI TRAILER LIGHTING REQUIREMENTS.

Figures 7—SMALL TRAILER LIGHTING REQUIREMENTS.