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*REAR WINDOW DEFOGGER INOPERATIVE (CONTINUED) POSSIBLE CAUSES REAR WINDOW DEFOGGER FUSED B(+) CIRCUIT OPEN REAR WINDOW DEFOGGER GRID OPEN REAR WINDOW DEFOGGER GRID GROUND CIRCUIT OPEN CENTRAL LOCKING PUMP/SECURITY SYSTEM MODULE For a complete Heated Glass Circuit Diagram (Refer to 8 - ELECTRICAL/HEATED GLASS - SCHEMATICS AND Diagnostic Test 1. INSPECT THE REAR WINDOW DEFOGGER INDICATOR ON THE A/C HEATER CONTROL MODULE Turn the ignition on. Activate the Rear Window Defogger. Is the rear window defogger indicator blinking? Yes >> Lower the electrical load on the vehicle until the light stops blinking. Once the rear window defogger indicator stops blinking, the system will resume normal operation. Perform BODY VERIFICATION TEST. No >> Go to 2 2. MEASURE REAR WINDOW DEFOGGER FUSED B(+) CIRCUIT VOLTAGE Note: Inspect Fuse 25 located in the Underhood Accessory Fuse Block. If the fuse is open, repair the cause Turn the ignition off. Disconnect the Central Locking Pump/Security System Module (CLP/ Note: Check connector - Clean/repair as necessary. Measure the voltage of the Fused B(+) circuit at the CLP/SSM C2 har- Is the voltage above 10 volts? Yes >> Go to 3 No >> Repair the CLP/SSM Fused B(+) circuit for an open. Perform BODY VERIFICATION TEST. ZH HEATED GLASS - ELECTRICAL DIAGNOSTICS 8G - 7 |