OAR 735-108-0073: Mounting, Wiring and Aiming of Front Fog Lamps for Motor Vehicles

(1) Transportation Safety adopts the mounting requirements for front 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 front centerline of the motor vehicle; (c) Mount the lamps not less than 12 inches (30.5 cm) nor more than 30 inches (76.2 cm) above the level ground; (d) Measure the mounting height from ground level to the center of the lens of the lamp; (e) Do not mount the lamps so they interfere with required motor vehicle lighting; and (f) Do not mount the lamps higher than the motor vehicle headlight system. (2) Transportation Safety adopts the wiring requirements for motor vehicle front fog lamps as follows: (a) Front fog lamps shall be wired so they can only come on when the motor vehicle low beam headlights are on; and (b) A switch shall be installed so front 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 front fog lamps are turned on and mounted in a location it is readily visible to the driver. (3) Transportation Safety adopts the aiming requirements for motor vehicle front fog lamps as follows: (a) Adjust lamps to a setting of 0-0 when using a mechanical aimer; or (b) When using a visual aiming screen, the beam is to be centered laterally about the vertical axis and aim the top of the beam 4 inches (100 mm) below horizontal axis at a distance of 25 feet (7.6 m) from the lens.