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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1811 (Fixed And MOVEABLE Windows) >> Diagnostic Information and Procedures >> DTC B0285 or B0286 >> Component Testing >> Defog Indicator

Defog Indicator

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness at the HVAC control module.
  2. Install a 5-amp fused jumper wire between circuit terminal 24 and 12 volts. Install a jumper wire between the ground circuit terminal 12 and ground. Verify the Defog indicator illuminates.
    • If the Defog Indicator does not illuminate, replace the HVAC control module.
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