Parking Lamp: Description and Operation

PARK, TAIL, MARKER, AND LICENSE LAMPS

The park, tail, marker, and license lamps are turned on when the headlamp switch is placed in the PARK or ON position or anytime the headlights are requested. Battery positive voltage is supplied to both the park lamp relay switch contacts and the park lamp coil circuit. The body control module (BCM) provides a ground or control circuit to the park lamp relay coil. When the park lamps are turned ON, the BCM energizes the park lamp relay. Current flow is from the park lamp relay to the individual park lamp circuit fuses and to their respective park, tail, marker, and license lamps. The front park lamps are grounded at G105 and G100. The tail lamps and license lamps are grounded at G402. If the driver places the headlight switch in the ON position after the ignition switch has been turned OFF, the park, tail, marker, and license lamps will remain ON until turned OFF or the battery runs dead.

The TR-PRK fuse in the rear fuse block supplies battery positive voltage to a separate park lamp circuit connected to the trailer wiring harness.