Daytime Running Lamp: Description and Operation

The Daytime Running Lamps (DRL) system operates the low beam head lamps at a reduced intensity. The DRL module supplies pulse width modulated voltage, approximately 75%-92% of battery voltage, to the low beam headlamps when the following conditions are met:
- parking brake control is released
- high beam headlamps are disabled
- ignition switch is in RUN position

The DRL module remains enabled when the low beam headlamps are turned on.