Normal Operation

The parking lamp relay is integral to the smart junction box (SJB). The parking lamp relay coil ground is controlled through circuit (W/B) from the headlamp switch. When the headlamp switch is placed in the PARKING LAMPS ON position, the headlamp switch routes the ground to circuit (B). When the parking lamp relay coil is energized, voltage is routed through circuits (BR) and (B/P) to the front and rear parking lamps, respectively. When the parking lamps are on, the SJB provides voltage to the trailer tow connector and the instrument panel dimmer switch through circuits (BR/W) and (R/Y), respectively.