Daytime Running Lamp: Description and Operation

DAYTIME RUNNING LAMPS (DRL)

The DRL are controlled by the smart junction box (SJB) and utilize the existing circuitry in the vehicle.

The DRL feature operates the low beam headlamps at reduced intensity. This is accomplished by the SJB sending a pulse-width modulated voltage (PWM) to the low beam headlamps.

The DRL are turned on when the following conditions are met:
- Ignition switch is in the RUN position
- High beams are not illuminated
- Parking brake is not engaged