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Turn Signal/Multifunction Switch Malfunction

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the turn signal/multifunction switch.
  2. Ignition OFF, verify that a test lamp illuminates between B+ and the appropriate ground circuit terminal listed below.
    • Ground terminal A - with MH2
    • Ground terminal G - without MH2
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Flash to Pass Switch parameter is Inactive.
    • If not the specified value, test the appropriate signal circuit terminal listed below for a short to ground. If the circuit tests normal, replace the BCM.
      • Signal terminal C - with LE5 and MH2
      • Signal terminal J - without LE5 and MH2
  4. Verify the scan tool High Beam Select Switch parameter is Inactive.
    • If not the specified value, test the appropriate signal circuit terminal listed below for a short to ground. If the circuit tests normal, replace the BCM.
      • Signal terminal B - with LE5 and MH2
      • Signal terminal H - without LE5 and MH2
  5. Install a 3A fused jumper wire between the appropriate signal circuit terminal listed below and ground. Verify the scan tool Flash to Pass Switch parameter is Active.
    • Signal terminal C - with LE5 and MH2
    • Signal terminal J - without LE5 and MH2
    • 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.
  6. Install a 3A fused jumper wire between the appropriate signal circuit terminal listed below and ground. Verify the scan tool High Beam Select Switch parameter is Active.
    • Signal terminal B - with LE5 and MH2
    • Signal terminal H - without LE5 and MH2
    • 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.
  7. If all circuits test normal, test or replace the turn signal/multifunction switch.
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