Accessory Delay Module: Description and Operation

ENABLING
When the ignition switch is cycled to the RUN position, the body control module (PZM) energizes the controlled power relay and the accessory time delay relay. The PZM energizes the controlled power relay by grounding terminal B7 on CKT 755 (BLK). This condition applies battery voltage from the LH underhood fuse block BODY 3 fuse to the following rear compartment fuse block fuses:
^ RADIO/PHONE fuse
^ CLUSTER fuse
^ AMP fuse (DeVille)

The PZM energizes the accessory time delay relay by grounding terminal Al on CKT 707 (BLK). This condition applies battery voltage from the LH underhood fuse block WINDOWS circuit breaker via CKT 70 (PNK).

DISABLING
When the ignition switch is cycled to the OFF position, the body control module (PZM) continues energizing the controlled power relay and the accessory time delay relay. The PZM starts a 10 minute timer. After 10 minutes, the PZM removes ground from CKT 707 (BLK) and CKT 755 (BLK), de-energizing the controlled power relay and the accessory time delay relay. This action cuts off battery voltage to the accessory circuits.

The PZM monitors the position of the doors. If a door is opened, the corresponding door jamb switch closes. This action grounds the PZM door jamb input terminal. The PZM removes ground from CKT 707 (BLK) and CKT 755 (BLK), de-energizing the controlled power relay and the accessory time delay relay. This action occurs regardless of the elapsed time.