LEMON Manuals: Even more car manuals for everyone
Home >> Saab >> 2011 >> 9-5 Turbo6 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting And Signaling Systems >> Fault diagnosis, fault codes >> DTC B257C: Left Headlamp Assembly Malfunction or B257D: Right Headlamp Assembly Malfunction >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the appropriate harness connector at the inoperative headlamps listed below:
    • E13L Headlamp Assembly - Left
    • E13R Headlamp Assembly - Right
  2. Test for less than 5 Ω between the appropriate headlamp ground circuit harness connector terminal 1 and ground.
  3. If greater than the specified range, test the ground circuit for an open/high resistance.
  4. Reconnect the headlamp connector and remove the appropriate fuse listed below:
    • F50 UA Left Low Beam
    • F49 UA Right Low Beam
  5. Verify that the appropriate headlamp does not illuminate.
  6. If the headlamp does illuminate, test the fuse output circuit for a short to voltage.
  7. Install a 10 A fused jumper wire between appropriate fuse output contact and B+. Verify that the appropriate low beam illuminates.
  8. If the headlamp does not illuminate, test the fuse output circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the appropriate bulb.
  9. If all circuits test normal, replace the K26 Headlamp Control Module.
scientia non olet · About LEMON Manuals