Circuit/System Testing
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
B3819 00 or B3822 00
- Ignition OFF, disconnect the harness connector at the appropriate rear window switch.
- Test for more than 10 volts between the power window switch rear up signal circuit terminal B and ground while commanding the rear window UP with a scan tool.
- If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.
- If the circuit tests normal, replace the rear window switch.
B3820 00 or B3823 00
- Ignition OFF, disconnect the harness connector at the appropriate rear window switch.
- Test for more than 10 volts between the power window switch rear down signal circuit terminal C and ground while commanding the rear window DOWN with a scan tool.
- If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.
- If the circuit tests normal, replace the rear window switch.