OAR 735-108-0076: Mounting, Wiring and Aiming of Rear Fog Lamps for Motor Vehicles and Trailers

(1) Transportation Safety adopts the mounting requirements for rear fog lamps as follows: (a) If one lamp is installed, mount the lamp on the left side of the motor vehicle; (b) If two lamps are installed, mount the lamps symmetrically around the rear centerline of the motor vehicle; (c) Mount the lamps the same height above the level ground as taillights are mounted; (d) Measure the mounting height from ground level to the center of the lens of the lamp; and (e) Do not mount the lamps so they interfere with required motor vehicle lighting. (2) Transportation Safety adopts the wiring requirements for motor vehicle rear fog lamps as follows: (a) Rear fog lamps shall be wired so they can only come on when the motor vehicle low beam headlights are on; (b) A switch shall be installed so rear fog lamps can be turned off or on leaving the low beam of the headlights on; and (c) A steady burning indicator light shall be wired so it comes on when the rear fog lamps are turned on and mounted in a location it is readily visible to the driver. (3) Transportation Safety adopts the aiming requirement for motor vehicle rear fog lamp through a horizontal angle from 45 degrees to the left and right of the center of the lamp.