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Home >> Saab >> 2011 >> 9-5 Turbo6 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Gauges & Instrument Panels >> Driver Information, Main Instrument Unit And SID >> Fault diagnosis, fault codes >> DTC B3634: Head-Up Display Dimming Switch Circuit Short to Ground >> Component Testing >> Static Test

Static Test

  1. Ignition OFF, disconnect the harness connector at the S27 Head-Up Display Switch.
  2. Turn the dimming switch to minimum position.
  3. Test for 25-40 Ω between the signal terminal 3 and the low reference circuit terminal 1. Turn the dimming switch from minimum to maximum and verify the resistance increases in each position to 875-950 Ω in maximum position.
  4. If the resistance does not change, replace the S27 Head-Up Display Switch.
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