Tail Lamp: Description and Operation

The front park lamps are made up of the front park/turn signal lamps and the front marker lamps. The rear park lamps are made up of the rear tail/turn signal lamps, rear sidemarker lamps, and rear license plate lamp.

The headlamp switch is used to operate the park lamps and rear license plate lamps. Turning the headlamp switch to the park position will turn ON the park lamps. The park lamps can also be illuminated by the Body Control Module (BCM) during automatic headlamp operation in low light mode.

When the headlamp switch placed in the PARK position battery voltage is supplied through the headlamp switch to both the TAILLAMPS fuse and the FRT PARK LPS fuse. Battery voltage is then applied through the TAILLAMPS fuse and the FRT PARK LPS fuse to the front park lamps, tail lamps, and rear license plate lamp. The tail lamps and rear license plate lamps receive ground at all times from G302. The front park lamps receive ground from G101.

The park lamps can also be controlled by the park lamp relay during automatic headlamp operation in low light mode. Both the coil and the switched sides of the park lamp relay receive battery voltage at all times. When the BCM is in low light mode, the BCM then applies a ground through the park lamp relay control circuit to the park lamp relay. This energizes the relay closing the switch contact and applies battery voltage to both the TAILLAMPS fuse and the FRT PARK LPS fuse. Battery voltage is then applied through the TAILLAMPS fuse and the FRT PARK LPS fuse to the front park lamps, tail lamps, and the rear license plate lamps. The tail lamps and rear license plate lamps receive ground at all times from G302. The front park lamps receive ground from G101.