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Home >> Chevrolet >> 2018 >> Traverse LS, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting System - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> Dome Lamps Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify the scan tool Door Ajar Sw. parameter changes between Active and Inactive while opening and closing each vehicle door.
    • Go to next step: If the parameter changes 
  3. Verify the scan tool Interior/Courtesy Lighting Master Switch parameter changes between INACTIVE and ON/OFF while switching the dome lamp switch from the ON/OFF positions.
    • If the parameter does not change 

      Refer to Dome Lamp Switch Malfunction.

    • Go to next step: If the parameter changes 
  4. Verify the scan tool Interior/Courtesy Lighting Master Switch parameter changes between INACTIVE and DOOR while switching the dome lamp cancel switch from the ON/OFF positions.
    • If the parameter does not change 

      Refer to Dome Lamp Switch Malfunction.

    • Go to next step: If the parameter changes 
  5. Verify all dome lamps controlled by the dome/courtesy lamps control circuit at terminal 1 X7 turn ON and OFF while commanding the Courtesy Lamps ON and OFF with a scan tool.
    • If the dome lamps do not turn ON and OFF 

      Refer to Dome Lamps Malfunction.

    • Go to next step: If the dome lamps turn ON and OFF 
  6. All OK.
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