Power Door Lock Actuator: Testing and Inspection

DOOR LOCK ACTUATOR INSPECTION
1. Remove the door lock actuator from the door panel.
2. The actuator switch circuit is functioning properly if continuity exists between actuator connector terminals 2 and 4 while the actuator plunger is out (while the door lock actuator switch is OFF), and ceases to exist when the plunger goes in (when the door lock actuator switch becomes ON).
3. Connect the battery source to the actuator terminals 1 and 3, and check the shaft for operation. if the shaft moves in opposite direction when the connection polarity is changed, the actuator should be considered to be in normal condition.