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Circuit/System Testing

WARNING: This page is about a different car, the 2007 Pontiac Torrent and 2007 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Place the PRNDL in to the PARK Position. Disconnect both tail lamp assemblies and the inside rearview mirror. Clear the DTC. Using a test lamp connected to ground probe the backup lamps voltage supply circuit at one of the tail lamps.
    • If the test lamp illuminate, test for a short to ground in backup lamps voltage supply circuit. If all circuits/connections test normal, replace the BCM.
  2. Connect one of the tail lamp assemblies and test for the DTC. If the DTC resets replace that tail lamp assembly.
    • If tail lamps test normal, replace the inside rearview mirror.
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