Circuit/System Testing
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the steering wheel controls switch - left.
- Connect a fused jumper wire between the voltage reference circuit terminal 1 and the cruise control indicator signal circuit terminal 9.
- Engine ON, observe the Cruise On/Off Switch parameter.
- If the Cruise On/Off Switch parameter displays ON, replace the steering wheel controls switch - left.
- If the Cruise On/Off Switch parameter displays OFF, test the voltage signal circuit and the low reference circuit for an open/high resistance.
- If all circuits test normal, replace the BCM.