OAR 735-108-0085
Mounting, Wiring and Aiming of Auxiliary Low Beam Lamps for Motor Vehicles
(1)
Transportation Safety adopts the mounting requirements for auxiliary low beam 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 24 inches (61 cm) nor more than 42 inches (106.7 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 auxiliary low beam lamps as follows:(a)
Auxiliary low beam 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 lamps can be turned off when only use of the low beam of the headlight system is required or when high beam of the headlight light system is being used; and(c)
A steady burning indicator lights shall be wired so it comes on when the auxiliary low beam lamps are 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 lamp or lamps shall be aimed with:(A)
The left edge of the high intensity zone of the beam one inch (25 mm) above horizontal at a distance of 25 feet (7.6 mm) from the lens; and(B)
The top edge of the high intensity zone of the beam five inches (130 mm) left of vertical at a distance of 25 feet (7.6 mm) from the lens.
Source:
Rule 735-108-0085 — Mounting, Wiring and Aiming of Auxiliary Low Beam Lamps for Motor Vehicles, https://secure.sos.state.or.us/oard/view.action?ruleNumber=735-108-0085.