Door Switch: Testing and Inspection

DOOR AJAR SWITCH
Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin-out and location views for the various wire harness connectors, splices, and grounds.

1. Disconnect and isolate the battery negative cable. Remove the door ajar switch from its mounting hole in the door hinge pillar. Disconnect the cross body wire harness connector for the door ajar switch from the switch connector receptacle. Check for continuity between the door ajar switch output and the driver or passenger door ajar switch sense circuit terminals in the door ajar switch connector receptacle. There should be continuity with the switch plunger released, and no continuity with the switch plunger depressed. If OK, go to Step 2. If not OK, replace the faulty door ajar switch.
2. Check for continuity between the door ajar switch output circuit cavity of the cross body wire harness connector for the driver or passenger door ajar switch and a good ground. There should be continuity. If OK, go to Step 3. If not OK, repair the open door ajar switch output circuit to ground (G300) as required.
3. Remove the instrument cluster from the instrument panel. Disconnect the instrument panel wire harness connector (Connector C2) for the instrument cluster from the cluster connector receptacle on the back of the cluster housing. Check for continuity between the driver or passenger door ajar switch sense circuit cavity of the cross body wire harness connector for the driver or passenger door ajar switch and a good ground. There should be no continuity. If OK, go to Step 4. If not OK, repair the shorted driver or passenger door ajar switch sense circuit between the door ajar switch and the instrument cluster as required.
4. Check for continuity between the driver or passenger door ajar switch sense circuit cavities of the cross body wire harness connector for the driver or passenger door ajar switch and the instrument panel wire harness connector (Connector C2) for the instrument cluster. There should be continuity. If not OK, repair the open driver or passenger door ajar switch sense circuit between the door ajar switch and the instrument cluster as required.