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Home >> GMC >> 2007 >> Acadia SLT, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> Head Up Display (HUD) Turn Signal Indicator Inoperative - Left and Right Side (If Equipt) >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the HUD module.
  2. Ignition ON, suspect turn signal ON, verify that a test lamp illuminates between the suspect turn signal lamps supply voltage circuit and ground
    • If the test lamp does not illuminate, test the suspect turn signal lamps supply voltage circuit for an open/high resistance.
  3. If all circuits test normal, test or replace the HUD module.
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