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Home >> Pontiac >> 2009 >> Solstice Base, 2D Convertible, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 160 (Fixed And MOVEABLE Windows System) >> Diagnostic Information and Procedures >> Rear Window Defogger Malfunction >> Component Testing >> Defog Switch

Defog Switch

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X2 harness connector at the HVAC control module.
  2. Test for infinite resistance between the signal terminal A8 and the ground terminal A5 with the switch in the open position.
    • If not the specified value, replace the HVAC control module.
  3. Test for less the 2 ohms between the signal terminal A8 and the ground terminal A5 with the switch in the closed position.
    • If greater than the specified range, replace the HVAC control module.
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