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Home >> Saab >> 2011 >> 9-5 Turbo6 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting And Signaling Systems >> Fault diagnosis, fault codes >> DTC B3881: Tail Lamp Circuit Short to Ground or B3882: Right Tail Lamp Circuit Short to Ground >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the appropriate harness connector at the tail lamp listed below:
    • E42L Tail Lamp Assembly - Auxiliary Left
    • E42R Tail Lamp Assembly - Auxiliary Right
  2. Test for less than 5 Ω between the appropriate ground circuit harness connector terminal listed below and ground:
    • E42L Tail Lamp Assembly - Auxiliary Left harness connector terminal F
    • E42R Tail Lamp Assembly - Auxiliary 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 Assembly - Auxiliary Left harness connector terminal A
    • E42R Tail Lamp Assembly - Auxiliary Right harness connector terminal A
  4. Command the appropriate Rear Park Lamp test with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
  5. If the test lamp is always ON, test the appropriate control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.
  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 circuit tests normal, replace the K9 Body Control Module.
  7. If all circuits test normal, test or replace the appropriate tail lamp.
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