Daytime Running Lamps (DRL)

When the Ignition Switch is in RUN, the Ambient Light Sensor indicates daylight and the vehicle is not in PARK, the Daytime Running Lamps are activated. When these conditions have been met, the Lamp Control Module (LCM) supplies voltage through CKT 589 (GRY) to the High Beam Headlamps in series. Because the High Beam Headlamps are in series, they split the voltage supplied by the LCM and the High Beam Headlamps light at a reduced intensity. The Daytime Running Lamps are disabled if the vehicle is placed in PARK. When the Ambient Light Sensor indicates darkness, the low Beams are automatically turn on at regular intensity and the High Beam turn OFF.