Daytime Running Lamps (DRL)

When the ignition switch is in the RUN position, the ambient light sensor indicates daylight, and the vehicle is not in PARK, the daytime running lamps (DRL) are activated. When these conditions have been met, the LCM supplies battery positive voltage (B+) through CKT 589 (GRY), the DRL resistor, and CKT 12 (TAN) to the low beam headlamps. The DRL resistor reduces the voltage supplied by the LCM and the low beam headlamps light at a reduced intensity. "he DRL are disabled if the vehicle is placed in PARK. V/hen the ambient light sensor indicates darkness, the low beams are automatically switched from reduced intensity to regular intensity.