Security lamp. Turn signal indicator lamp

Security lamp

The diagnosis found here addresses an inoperative security lamp condition. If the problem being diagnosed is an inaccurate security lamp, refer to Vehicle Theft Security System in the Diagnosis and Testing section of Group 8Q - Vehicle Theft/Security Systems for diagnosis. For complete circuit diagrams, refer to Instrument Cluster in the Contents of Group 8W - Wiring Diagrams.

(1) Check the fused B(+) fuse in the junction block.

If OK, go to Step 2. If not OK, repair the shorted circuit or component as required and replace the faulty fuse.

(2) Check for battery voltage at the fused B(+) fuse in the junction block. If OK, go to Step 3. If not OK, repair the open fused B(+) circuit to the battery as required.

(3) Disconnect and isolate the battery negative cable. Remove the Central Timer Module (CTM). Disconnect the CTM wire harness connectors. Connect the battery negative cable. Install a jumper wire between the VTSS indicator driver circuit cavity of the 18-way CTM wire harness connector and a good ground. The security lamp should light. If OK, use a DRB scan tool and the proper Diagnostic Procedures manual to diagnose the Vehicle Theft Security System (VTSS) and the CTM. If not OK, go to Step 4.

(4) Disconnect and isolate the battery negative cable. Remove the instrument cluster. Check for continuity between the fused B(+) circuit cavity of the instrument cluster wire harness connector A and the fused B(+) fuse in the junction block. There should be continuity. If OK, go to Step 5. If not OK, repair the open fused B(+) circuit to the fuse in the junction block as required.

(5) Check for continuity between the VTSS indicator driver circuit cavities of the instrument cluster wire harness connector A and the 18-way CTM wire harness connector. There should be continuity. If OK, refer to Instrument Cluster - Self-Diagnostic Test in the Diagnosis and Testing section of this group for further diagnosis of the security lamp and the instrument cluster circuitry. If not OK, repair the open VTSS indicator driver circuit as required.

Turn signal indicator lamp

The diagnosis found here addresses an inoperative turn signal indicator lamp condition. For any other turn signal problem, refer to Turn Signal and Hazard Warning Systems in the Diagnosis and Testing section of Group 8J - Turn Signal and Hazard Warning Systems for further diagnosis. If no turn signal or hazard warning system problem is found, the following procedure will help locate a short or open in the indicator lamp circuit. For complete circuit descriptions, refer to Instrument Cluster in the Contents of Group 8W - Wiring Diagrams.

(1) Disconnect and isolate the battery negative cable. Remove the instrument cluster.

(2) Connect the battery negative cable. Activate the hazard warning system by moving the hazard warning switch button to the On position. Check for battery voltage at the inoperative (right or left) turn signal circuit cavity of the instrument cluster wire harness connector B. There should be a switching (on and off) battery voltage signal. If OK, replace the faulty (right or left) turn signal indicator lamp bulb.

If not OK, repair the open (right or left) turn signal circuit to the turn signal/hazard warning (multi-function) switch as required.