LEMON Manuals: Even more car manuals for everyone
Home >> Saab >> 2011 >> 9-5 Turbo6 >> Repair and Diagnosis >> Electrical >> Horns >> Lighting And Signaling Systems >> Fault diagnosis, symptoms >> Stop Lamps Malfunction >> Circuit/System Testing >> Brake Lamp Malfunction

Brake Lamp Malfunction

  1. Ignition OFF, disconnect the appropriate harness connector at the tail lamp listed below:
    • E42L Tail Lamp - Left
    • E42R Tail Lamp - Right
  2. Test for less than 5 Ω between the appropriate ground circuit harness connector terminal listed below and ground:
    • E42L Tail Lamp - Left harness connector terminal F
    • E42R Tail Lamp - Right harness connector terminal F
    • If greater than the specified value, test the appropriate 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:
    • E42L Tail Lamp - Left harness connector terminal C
    • E42R Tail Lamp - Right harness connector terminal C
  4. Apply the brake pedal. The test lamp should turn ON and OFF when changing between applied and not applied.
  5. If the test lamp is always ON, test the appropriate control circuit for a short to voltage. If the test shows that the circuit is normal, replace the body electronic module K9.
  6. If the test lamp is always OFF, test the appropriate 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.
  7. If all circuits test normal, test or replace the appropriate tail lamp.
scientia non olet · About LEMON Manuals