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Home >> Chevrolet >> 2017 >> Traverse LS Base >> Repair and Diagnosis >> Body & Frame >> Windows >> Fixed And MOVEABLE Window System >> Diagnostic Information and Procedures >> DTC B0283: Electric Rear Defrost Circuit Short >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the RR DEFOG relay.
  2. Test for less than 1 ohm between the ground circuit terminal 85 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance
  3. Connect a test lamp between the control circuit terminal 86 and the ground circuit terminal 85.
  4. Ignition ON, command the Rear Defog Request ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the HVAC control module.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the HVAC control module.
  5. If all circuits test normal, test or replace the RR DEFOG relay.
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