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Home >> Cadillac >> 2018 >> XT5 Platinum >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Lighting System - Diagnostic Information And Procedures (DTC B3950 - C0297) >> Diagnostic Information and Procedures >> Daytime Running Lamps Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify the left daytime running lamp turns ON and OFF while commanding the Left Dedicated Daytime Running Lamp ON and OFF with a scan tool.
    • If the left daytime running lamp does not turn ON and OFF 

      Refer to Daytime Running Lamps Malfunction.

    • Go to next step: If the left daytime running lamp turns ON and OFF 
  3. Verify the right daytime running lamp turns ON and OFF while commanding the Right Dedicated Daytime Running Lamp ON and OFF with a scan tool.
    • If the right daytime running lamp does not turn ON and OFF 

      Refer to Daytime Running Lamps Malfunction.

    • Go to next step: If the right daytime running lamp turns ON and OFF 
  4. Refer to Circuit/System Testing - Ambient Light Sensor Malfunction - (without CE1) or Rain/Ambient Light Sensor Module Malfunction - (with CE1).
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