Daytime Running Lamps (DRL) (Domestic)
WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
The operation or the DRL is controlled by the DRL control module. The DRL control module receives battery positive voltage from the DRL 15 A fuse in the IP fuse block. The DRL module is grounded at G201.
The headlamp and park brake switches must be OFF and the ignition switch must be in the RUN position in order for the DRL to illuminate.
To determine control to the DRL the DRL module uses the following inputs:
- Ignition 1 voltage circuit
- Headlamp high beam supply voltage circuit
- Headlamp low beam supply voltage circuit
- Park brake switch signal circuit
The DRL module turns on the DRL by suppling a specific voltage to the headlamp low beam supply circuit. The DRL module turns on the DRL indicator by grounding the DRL relay control circuit.
The DRL module also turns on the brake warning indicator by grounding the brake warning indicator control circuit.