Turn Signal/Multifunction Switch Circuit Test
WARNING: This page is about a different car, the 2008 Pontiac Torrent and 2008 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the X2 harness connector at the turn signal/multifunction switch.
- Verify that a test lamp illuminates between the ground circuit terminal B and B+.
- If the test lamp does not illuminate, test the ground circuit for an open/high resistance.
- Ignition ON, verify the scan tool Left Turn Signal Switch parameter is Inactive.
- If not the specified value, test the signal circuit terminal G for a short to ground. If the circuit tests normal, replace the BCM.
- Verify the scan tool Right Turn Signal Switch parameter is Inactive.
- If not the specified value, test the signal circuit terminal H for a short to ground. If the circuit tests normal, replace the BCM.
- Install a 3A fused jumper wire between the signal circuit terminal G and the ground circuit terminal B. Verify the scan tool Left Turn Signal 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 BCM.
- Install a 3A fused jumper wire between the signal circuit terminal H and the ground circuit terminal B. Verify the scan tool Right Turn Signal 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 BCM.
- If all circuits test normal, test or replace the turn signal/multifunction switch.