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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting System >> Diagnostic Information and Procedures >> Park, License, and/or Tail Lamps Malfunction (With X88, Z75, and Z88) >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON, observe the scan tool Parking Lamp Switch parameter while cycling the park lamp switch ON and OFF. The readings should toggle between Active and Inactive.
    • If the readings do not change between the commanded states, refer to Park Lamp Switch Malfunction.
  2. Ignition ON, command the Parking Lamps ON and OFF with a scan tool. The park lamps should turn ON and OFF when changing between the commanded states.
    • If the park lamps do not turn ON and OFF when commanded, refer to Park, License, and/or Tail Lamps Malfunction.
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