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Home >> Saab >> 2011 >> 9-5 Turbo6 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting And Signaling Systems >> Fault diagnosis, symptoms >> Dome Lamps Malfunction >> Circuit/System Testing >> Dome Lamp Switch Malfunction

Dome Lamp Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the E37F Dome/Reading Lamps - Front.
  2. Test for less than 5 Ω between the ground circuit terminal 6 and ground.
  3. If greater than the specified range, test the ground circuit for an open/high resistance.
  4. Ignition ON, verify the scan tool Interior/Courtesy Lighting Master Switch parameter is Auto when the switch is in Door position.
  5. If the scan tool Interior/Courtesy Lighting Master Switch parameter is Cancel, test the dome lamp defeat signal circuit terminal 4 for short circuit to ground. If the circuit tests normal, replace the K9 Body Control Module.
  6. If the scan tool Interior/Courtesy Lighting Master Switch parameter is On, test the dome lamp on signal circuit terminal 5 for short circuit to ground. If the circuit tests normal, replace the K9 Body Control Module.
  7. Install a 3 A fused jumper wire between the dome defeat signal circuit terminal 4 and the ground circuit terminal 6. Verify the scan tool Interior/Courtesy Lighting Master Switch parameter is Cancel.
  8. If not the specified state, test the dome lamp defeat signal circuit for short circuit to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
  9. Install a 3 A fused jumper wire between the dome lamp on signal circuit terminal 5 and the ground circuit terminal 6. Verify the scan tool Interior/Courtesy Lighting Master Switch parameter is On.
  10. If not the specified state, test the dome lamp on signal circuit for short circuit to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
  11. If all circuits test normal, test or replace the E37F Dome/Reading Lamps - Front.


  1. Ignition OFF, disconnect the harness connectors at the appropriate dome lamp.
  2. Test for less than 5 Ω between the ground circuit terminal 6 and ground.
  3. If greater than the specified range, test the ground circuit for an open/high resistance.
  4. Connect a test lamp between the control circuit terminal 2 and the ground circuit terminal 6.
  5. Command the Courtesy Lamps ON and OFF with the scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
  6. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.
  7. If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
  8. If all circuits test normal, test or replace the E37F Dome/Reading Lamps - Front or E37M Dome/Reading Lamps - Middle.
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