Park, Tail, License and Side Marker Lamps

The park lamps, tail lamps, and license plate lamps are turned ON when the headlamp switch is placed in the PARK, AUTO, or LOW BEAM position. When the BCM receives a request from the headlamp switch to turn ON the park lamps the BCM applies ground to the park lamps relay control circuit, which energizes the park lamps relay. With the park lamps relay energized, the switch contacts close allowing battery voltage to flow through the left and right park lamp fuses to the park lamp control circuits illuminating left and right park, side marker, and tail lamps.