Circuit/System Testing
WARNING: This page is about a different car, the 2012 GMC Sierra, 2012 GMC Cab & Chassis Sierra, 2012 Chevrolet Silverado, and 2012 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
B1265 01
- Ignition OFF, radio OFF, radio B+ fuse removed, disconnect all of the connectors listed below:
- Audio Amplifier X3
- Video Display (if equipped)
- Reinstall the radio B+ fuse. Ignition OFF, radio OFF, verify that a test lamp does not illuminate between the entertainment remote enable circuit terminals listed below and ground:
- Audio Amplifier X3 terminal 8
- Video Display terminal 8 (if equipped)
- If the test lamp illuminates, test the entertainment remote enable circuit for a short to voltage. If the circuit tests normal replace the radio.
- Re-connect the harness connectors listed below one at a time. Verify that DTC B1265 01 does NOT set as current as each component is re-connected.
- Audio Amplifier X3
- Video Display (if equipped)
- If DTC B1265 01 sets as current, replace the module/component that was just re-connected.
B1265 02
- Ignition OFF, radio OFF, radio B+ fuse removed, disconnect all of the connectors listed below:
- Audio Amplifier X3
- Video Display (if equipped)
- Reinstall the radio B+ fuse. Ignition ON, radio ON, verify that a test lamp illuminates between the entertainment remote enable circuit terminals listed below and ground:
- Audio Amplifier X3 terminal 8
- Video terminal 8 (if equipped)
- If the test lamp does not illuminate, test the entertainment remote enable circuit for a short to ground or an open/high resistance. If the circuit tests normal replace the radio.
- Re-connect the harness connectors listed below one at a time. Verify that DTC B1265 02 does NOT set as current as each component is re-connected.
- Audio Amplifier X3
- Video Display (if equipped)
- If DTC B1265 02 sets as current, replace the module/component that was just re-connected.