Power Locks: Description and Operation

Operation

Standard Entry
The power door locks are powered through fuse number 5, located in the engine compartment power distribution box.

Door locks switch is pressed to lock:

All lock relay is energized through either door lock switch. Battery power is supplied to both door lock actuators through the all lock relay. Current flows through the RH door lock actuator and goes to ground through the all unlock relay. Current flows through the LH door lock actuator and goes to ground through the driver's unlock relay and the all unlock relay.

Door locks switch pressed to unlock:

All unlock relay is energized through either door lock switch. Battery power is supplied to the RH door lock actuator through the all unlock relay. LH door lock actuator receives battery power through the all unlock relay and the driver's unlock relay. Current flows through the RH door lock actuator and goes to ground through the all lock relay. Current flows through the RH door lock actuator and goes to ground through the all lock relay. Current flows through the LH door lock actuator through the all unlock relay and the driver's unlock relay and goes to ground through the all lock relay.

When not in use, the actuator circuits are grounded through the switches.

Entry with Key Fob (RAP)
The power door locks are powered through fuse 5 located in engine compartment distribution box. When the unlock button on key fob is pressed once, the driver door will unlock; when pressed again (within five seconds of first button depression) all doors will unlock.

The door locks are wired so that the lock and unlock switches on the doors can operate the door locks with or without a RAP module installed in the system. The door lock switches are wired directly to the relays.

When the RAP module operates the door locks, it provides a ground just like the door lock switches. Both the GEM and RAP module operate the door lock switches. (GEM performs the two-key unlock). If the RAP module and GEM are both disconnected and the door locks still do not work, there is a switch, motor, lock mechanism, fuse or wiring issue.