Circuit/System Testing
WARNING: This page is about a different car, the 2011 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the S48C multi-function switch 1-instrument panel.
- Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 10 Ω between the ground circuit terminal 7 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify the scan tool Hazard Lamps Switch parameter is Inactive.
- If not the specified value, test the signal circuit terminal 10 for a short to ground. If the circuits tests normal, replace the K9 BCM.
- Install a 3 A fused jumper wire between the signal circuit terminal 10 and the ground circuit terminal 7. Verify the scan tool Hazard Lamps Switch parameter is Active.
- If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
- If all circuits test normal, test or replace the S48C multi-function switch 1-instrument panel.