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The numbers below refer to the step numbers on the diagnostic table. 2: Listen for an audible click when the rear defog relay operates. Command both the ON 3: This step verifies that the BCM is providing battery positive voltage input to the rear 5: This step tests for a short to ground or short to voltage on the rear defog relay control DTC B0285 or B0286 Step Action Yes No Schematic Reference: Defogger Schematics 1 Did you perform the Diagnostic System Go to Step 2 Go to 2 1. Turn ON the ignition, with the engine OFF. 2. With a scan tool, select from Special Functions the Rear Defogger Relay 3. Command the Rear Defogger Relay ON and OFF. Do you hear a click when you command the Go to Testing Go to Step 3 3 1. Turn OFF the ignition. 2. Disconnect the rear defog relay. 3. Turn ON the ignition, with the engine OFF. 4. Connect a test lamp between the rear defog relay connector control circuit of 5. With a scan tool, command the rear defog relay ON and OFF.
2007 Hummer H3 2007 ACCESSORIES & EQUIPMENT Fixed and Moveable Windows - H3
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