Instrument cluster

Before performing this test, see Driver Seat Belt Switch in the Diagnosis and Testing section of this group, and Instrument Cluster in the Diagnosis and Testing section of Group 8E - Instrument Panel Systems.

For circuit descriptions and diagrams, refer to 8W-40 - Instrument Cluster or 8W-45 - Central Timer Module in Group 8W - Wiring Diagrams.

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO GROUP 8M - PASSIVE RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

(1) Disconnect and isolate the battery negative cable. Remove the instrument cluster from the instrument panel. Refer to Instrument Cluster in the Removal and Installation section of Group 8E - Instrument Panel Systems for the procedures.

(2) Remove the Central Timer Module (CTM) from its mounting bracket to access the CTM wire harness connectors. Refer to Central Timer Module in the Removal and Installation section of Group 8E - Instrument Panel Systems for the procedures.

Unplug the 14-way CTM wire harness connector.

(3) Check for continuity between the chime request circuit cavity of the 14-way CTM wire harness connector and a good ground. There should be no continuity.

If OK, go to Step 4. If not OK, repair the short circuit as required.

(4) Check for continuity between the chime request circuit cavities of the 14-way CTM wire harness connector and the instrument cluster wire harness connector (connector B). There should be continuity. If OK, test the CTM as described in this group. If not OK, repair the open circuit as required.