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Does the scan tool display On? Go to Step 7 Go to Step 6 6 1. Turn OFF the ignition. 2. Disconnect the harness that contains the rear defogger switch signal circuit 3. Turn ON the ignition, with the engine OFF. 4. Connect a test lamp between battery voltage and the rear defogger switch 5. Depress the rear defogger switch. Does the test lamp illuminate? Go to Step 16 Go to Step 10 7 1. Connect a test lamp between the defogger relay control circuit and 2. Depress the rear window defogger switch. Does the test lamp illuminate? Go to Step 13 Go to Step 11 8 1. With a scan tool, select from the Special Functions the Rear Defogger 2. Command the Rear Defogger Relay ON and OFF. Do you hear a click when you command Go to Step 12 Go to Step 9 9 Connect a test lamp between the supply Go to Step 11 Go to Step 12 10 Test the rear defogger switch signal circuit
2007 Hummer H3 2007 ACCESSORIES & EQUIPMENT Fixed and Moveable Windows - H3
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