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Home >> Pontiac >> 2010 >> Solstice Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Body & Frame >> Fixed And MOVEABLE Windows System >> Diagnostic Information and Procedures >> Rear Window Defogger Malfunction >> Circuit/System Testing >> Rear Window Defogger Switch Malfunction
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Rear Window Defogger Switch Malfunction

  1. Ignition OFF, disconnect the X2 harness connector at the HVAC control module.
  2. Ignition ON, verify the scan tool Rear Defog Switch parameter is Off.
    • If not the specified value, test the signal circuit terminal J for a short to ground. If the circuit tests normal, replace the BCM.
  3. Install a 3A fused jumper wire between the signal circuit terminal J and ground. Verify the scan tool Rear Defog Switch parameter is On.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
  4. If all circuits test normal, replace the HVAC control module.
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