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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting System - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> Backup Lamps Malfunction (Manual Transmission) >> Circuit/System Verification

Circuit/System Verification

  1. Engine ON.
  2. Verify the scan tool Reverse Position Switch parameter changes between ON and OFF while shifting the vehicle between the neutral and reverse gears.
    • If the parameter does not change 

      Refer to Backup Lamp Switch Malfunction.

    • If the parameter changes 
  3. Verify the backup lamps turn ON and OFF when commanding the Backup Lamps ON and OFF with a scan tool.
    • If the backup lamps do not turn ON and OFF 

      Refer to Backup Lamps Malfunction.

    • If the backup lamps turn ON and OFF 
  4. All OK.
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