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.
IMPORTANT:
If rear video display turns ON but the video is blank, use diagnostic Video Display is Poor or Blank .
- Disconnect the second row video (and third row if equipped) display harness connector. With the ignition ON, operate the rear entertainment system. Verify there is voltage on the remote enable signal circuit.
- If voltage is not present on the remote enable signal circuit, test and repair open or short to ground.
- If the enable signal circuit tests normal but there is no voltage, replace the radio.
- Test and repair open, short to ground and short to power on the ground and battery positive voltage circuits at the second row video (and third row if equipped) display.
- If the video display power and ground circuits test normal, replace the suspected rear video display.