Trunk / Liftgate: Description and Operation

Voltage to the Rear Liftgate Release system Is available at all times through the CIG LTR fuse (Fuse 13) and the ORN (640) wire, this key operated Liftgate Lock/Unlock Re]ease Switch serves two purposes. The switch is capable of locking and unlocking all power door locks including the Liftgate lock/Unlock Relay which in turn energizes the Liftgate Rear Door Lock Motor When an unlock signal is sent, the Liftgate Lock/Unlock Relay moves to and rests in the UNLOCK position, the relay contacts close, which completes the circuit through the liftgate Lock/Unlock Relay to the Rear Liftgate Release Motor. The Rear Liftgate lock/Unlock Relay must be in the UNLOCK position for the Liftgate Lock/Unlock Release Switch to function.

With the Rear Door Lock Motor in the UNLOCK position, and the liftgate Lock/Unlock Release Switch push-button depressed, the electrical circuit is complete from the liftgate lock/Unlock Release Switch through the PPL (1305) wire to the Liftgate Lock/Unlock Relay and through its contacts to the Rear Liftgate Release Motor. The Rear Liftgate Release Motor receives its ground through the BLK (1450) circuit to G403.

The Door Lock System must be unlocked using the Liftgate Lock/Unlock Release Switch (Mechanical Key), the LH Power Door Lock Switch or RH Power Door Lock Switch. Once the door lock system is unlocked, the liftgate release switch must be pressed to electrically open the liftgate while the handle is pulled to release the secondary latch.