Power Door Lock Actuator: Testing and Inspection

Power Door Lock Motor:

NOTE: Perform SWITCH VOLTAGE TEST, and verify that the battery is fully charged before starting this test.

1. Locate the circuit breaker (in the fuse box) and connect the positive lead of a voltmeter to the light green terminal. Connect the other lead of the voltmeter to a good ground and check that there is battery voltage.
2. If battery voltage is not present, connect the voltmeter to the other (battery) side of the circuit breaker and check for battery voltage.
3. If battery voltage is present, the circuit breaker is defective and needs to be replaced. If battery voltage is not present, check for an open wire in the harness.
4. To detect which motor is defective, check each door for lock and unlock or disconnect the motor connections one at a time while operating the door lock switch.
5. If none of the door lock motors work, the problem may be caused by a shorted motor. Disconnecting the defective motor will allow the others to work.
6. If one of the motors has a broken pigtail connector, it should have no effect on the operation of the other door lock motors.