Principles of Operation

PRINCIPLES OF OPERATION

Daytime Running Lamps (DRL) The daytime running lamps (DRL) are controlled by the smart junction box (SJB). It operates the low beam headlamps at a reduced intensity. The DRL driver (integral to the SJB) supplies pulse-width modulated (PWM) voltage, approximately 75% - 92% of battery voltage, to the low beam headlamps when the following conditions are met:
- the high beam headlamps are disabled.
- the ignition switch is in the RUN position.
- the parking brake switch is not engaged.