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Home >> Saab >> 2011 >> 9-5 Turbo6 >> Repair and Diagnosis >> Electrical >> Horns >> Lighting And Signaling Systems >> Fault diagnosis, symptoms >> High Mount Stop Lamp Inoperative >> Circuit/System Testing >> Centre High Mounted Brake Lamp Malfunction

Centre High Mounted Brake Lamp Malfunction

  1. Ignition OFF, disconnect the harness connector at the E6 Centre High Mounted Stop Lamp.
  2. Test for less than 5 Ω between the appropriate ground circuit harness connector terminal listed below and ground:
    • 4D -E6 High-Level Centre Brake Light connection 2
    • 5D -E6 High-Level Centre Brake Light connection 1
    • If greater than the specified range, test the ground circuit for an open circuit/high resistance.
  3. Connect a test lamp between the appropriate control circuit harness connector terminal listed below and ground:
  4. Run the test of the center brake light command using a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • 4D -E6 High-Level Centre Brake Light connection 3
    • 5D -E6 High-Level Centre Brake Light connection 2
  5. Run the test of the center brake light command using a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the test shows that the circuit is normal, replace the body electronic module K9.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the test shows that the circuit is normal, replace the body electronic module K9.
    • If all circuits test normal, replace the E6 Centre High Mounted Stop Lamp.
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