Daytime Running Lamps

The Daytime Running Lamps (DRL) control module is designed to automatically operate the exterior lights depending on outside light conditions. The DRL control module operates in two modes. In the day mode. the two front turn signal lamps are on (non flashing). In the night mode, the low beam headlamps are on and the front marker. park and tail lamps are on.

When the DRL ambient light sensor senses darkness, the DRL control module operates in the night mode. The night mode contacts close, applying voltage to the headlamps and other exterior lights through the same circuit path as when the headlamp switch is in the HEAD position.

If the engine should stall with the DRL control module in the night mode, the DRL control module will turn off the headlamps and leave the marker, park and tail lamps on while the engine is being cranked. The headlamp switch operates as usual.