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Home >> Saab >> 2011 >> 9-5 Turbo6 >> Repair and Diagnosis >> Electrical >> Horns >> Lighting And Signaling Systems >> Fault diagnosis, symptoms >> Turn Signal Lamps and/or Indicators Malfunction >> Circuit/System Testing >> Turn Signal Switch Malfunction

Turn Signal Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the S78 Turn Signal/Multifunction Switch.
  2. Verify that a test lamp illuminates between B+ and the ground circuit terminal 3.
  3. If the test lamp does not illuminate, test the ground circuit for an open circuit/high resistance.
  4. Ignition ON, verify the scan tool Left Turn Signal Switch parameter is INACTIVE.
  5. If not the specified value, test the signal circuit terminal 1 for a short to ground. If the test shows that the circuit is normal, replace the body electronic module K9.
  6. Verify the scan tool Right Turn Signal Switch parameter is INACTIVE.
  7. If not the specified value, test the signal circuit terminal 7 for a short to ground. If the test shows that the circuit is normal, replace the body electronic module K9.
  8. Install a 3 A fused jumper wire between the signal circuit terminal 1 and ground. Verify the scan tool Left Turn Signal Switch parameter is ACTIVE.
  9. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the test shows that the circuit is normal, replace the body electronic module K9.
  10. Install a 3 A fused jumper wire between the signal circuit terminal 7 and ground. Verify the scan tool Right Turn Signal Switch parameter is ACTIVE.
  11. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the test shows that the circuit is normal, replace the body electronic module K9.
  12. If all circuits test normal, test or replace the S78 Turn Signal/Multifunction Switch.
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