Power Locks: Description and Operation

CIRCUIT OPERATION
The power door lock system is controlled by the Body Control Module (BCM). The door lock switches, located in the front doors, are supplied power on the M1 circuit. This circuit is the Ignition-Off Draw (IOD) circuit. It is protected by a 10 Amp fuse located in cavity 5 of the junction block.

Both switches have a Light Emitting Diode (LED) located internal to the switch for night illumination. Power for the LED's is supplied on circuit F20. The F20 circuit is protected by a 15 Amp fuse located in cavity 4 of the junction block. Power for the fuse is supplied on circuit A22. The A22 circuit connects to the ignition switch and is HOT in the RUN position only.

Circuit A22 is powered by circuit A2 from the Power Distribution Center (PDC). This circuit is protected by a 40 Amp fuse located in cavity 18 of the PDC. Ground for the LED's is supplied on circuit Z1 and terminates at the instrument panel left side cowl.

Power for the door lock motors is supplied to the BCM on circuit F135. This circuit is protected by a 15 Amp fuse located in cavity 9 of the junction block. Circuit A3 is used to supply power to the fuse.

Circuit A3 is HOT at all times and is protected by a 40 Amp fuse located in cavity 15 of the PDC. This circuit also supplies power for the Power Seat circuit breaker, and the Headlamp Delay Relay.