Daytime Running Lamp Control Unit: Description and Operation

DAYTIME RUNNING LAMPS (DRL) MODULE (EXPORT)
The Daytime Running Lamps (DRL) system is designed to automatically operate the low beam headlamps and the tail lamps, whenever the ignition switch is in the RUN position with the engine running.

The PARK LP fuse and the HEADLAMPS circuit breaker supply battery positive voltage to the DRL control module. The DRL/HVAC/TEMP fuse provides ignition positive voltage to the DRL control module. When the engine is running, the engine oil pressure (EOP) switch sends a signal to the DRL control module. The DRL control module then supplies battery voltage to the low beam headlamps and tail lamps. The DRL control module is grounded at G200.