Twilight Sentinel

Twilight sentinel determines whether the Daytime Running Lamps (DRL) or the exterior lamps and the low beam headlamps at full intensity should be on based on the reading from the ambient light sensor. When the ambient light sensor indicates daytime, the twilight sentinel turns on the DRL. When the ambient light sensor indicates darkness, the twilight sentinels turns on the exterior lamps and the low beam headlamps at full intensity. The twilight sentinel also keeps the lamps on for a delay period (3 to 180 seconds), when the vehicle is in PARK, the ambient light sensor indicates darkness, and the ignition switch is turned to the OFF position. The twilight sentinel can be manually held in the OFF position. When it is dark and the gear selector is in the PARK position, pushing the twilight sentinel switch to OFF will turn off the headlamps and exterior lamps. Pushing it to OFF again will turn on the headlamps and exterior lamps. When the gear selector is out of the PARK position, pushing the twilight sentinel switch will have no affect.