Power Door Lock Switch: Description and Operation

CIRCUIT OPERATION
The door lock switches use resistors internal to the switch. There are different resistors used for the LOCK and UNLOCK functions. Both switches have the same amount of resistance for the LOCK and UNLOCK functions.

When the operator selects the LOCK or UNLOCK function, from either switch, voltage is passed through the CLOSED contacts in the switch, through the appropriate resistor, to the P96 circuit for the right front door, and circuit P97 for the left front door. These circuits then connect to the Body Control Module (BCM).

The BCM then process this request and supplies power and ground to the appropriate circuits. When the LOCK function is selected power is supplied on circuit P33 to all the motors. Ground is supplied on circuit P34 and P55. For the UNLOCK function the circuits are reversed.