Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Power Window Lockout Function Inoperative
- Install a scan tool and display the Driver Door Switch Inputs data list.
- Ignition on, verify that the window lockout switch parameter displays On only while the lockout switch is pressed.
- If the switch parameter is incorrect, replace the DDS.
- Display the Body Control Module Doors data list.
- Verify that the LR and RR Window Enable Command parameters change form On to Off when the lockout function is activated.
- If the enable command parameters are incorrect, replace the BCM.
- Disconnect the affected rear door power window switch connector, and activate the rear window lockout function.
- Verify that a test lamp does not illuminate when connected from the lockout signal circuit terminal to ground.
- If the test lamp illuminates, test the lockout signal circuit for a short to voltage. If the circuit tests normal replace the BCM.
- If the circuits test normal replace the affected rear door power window switch.