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Home >> GMC >> 2002 >> Jimmy 2D Utility, Part Time, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1907 (Lighting System) >> Diagnostic Information and Procedures >> Turn Signal Lamps and/or Indicators Malfunction >> Circuit/System Testing >> Turn Signal Switch Malfunction
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Turn Signal 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 F - with LE5 and MH2
    • Ground terminal M - without LE5 and MH2
    • If the test lamp does not illuminate, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Left Turn Signal 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 D - with LE5 and MH2
      • Signal terminal K - without LE5 and MH2
  4. Verify the scan tool Right Turn Signal 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 E - with LE5 and MH2
      • Signal terminal L - 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 Left Turn Signal Switch parameter is Active.
    • Signal terminal D - with LE5 and MH2
    • Signal terminal K - 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 Right Turn Signal Switch parameter is Active.
    • Signal terminal E - with LE5 and MH2
    • Signal terminal L - 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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