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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 643 (Fixed & MOVEABLE Window Systems) >> Diagnostic Information and Procedures >> DTC B0283 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

Relay Test

  1. Ignition OFF, disconnect the RDFG relay.
  2. Test for 60-180 ohms of resistance between terminals 85 and 86.
    • If the resistance is not with in the specified range, replace the relay.
  3. Test for infinite resistance between the following terminals:
    • 30 and 86
    • 30 and 87
    • 30 and 85
    • 85 and 87
    • If not the specified value, replace the relay.
  4. Install a 25-amp fused jumper wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 ohms of resistance between terminals 30 and 87.
    • If greater than the specified range, replace the relay.

Defogger Indicator

  1. Ignition OFF, disconnect the harness at the HVAC control module.
  2. Install a 5-amp fused jumper wire between circuit terminal A7 and 12 volts. Install a jumper wire between the ground circuit terminal A5 and ground. Verify the defogger indicator illuminates.
    • If the defogger indicator does not illuminate, replace the HVAC control module
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