Rear Compartment Lid Release Circuit Description for Buick Century (China) (CNG) 1999

When you press the release button on the Remote Keyless Entry (RKE) transmitter to open the rear compartment lid, a signal is sent from the Remote Control Door Lock Receiver (RCDLR) through circuit 377 to the Body Control Module (BCM). If the BCM receives a signal via Class 2 from the Powertrain Control Module (PCM) indicating the position of the park neutral position (PNP) switch is in Park, then the BCM will send a ground signal through circuit 253 to the rear compartment lid release relay. The relay receives power from the F7 - F8 fuse in the fuse block through circuit 1540. When the relay receives the ground from the BCM, the relay's internal switch closes sending B+ (via circuit 56) to the rear compartment lid latch release actuator. A ground is always supplied to the actuator through circuit 350. When B+ is received at the actuator through circuit 56, the rear compartment lid releases.