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Circuit/System Verification

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify the left daytime running lamp turns ON and OFF while commanding the Left Front Park Lamp/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 Front Park Lamp/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 Rain/Ambient Light Sensor Module Malfunction or Ambient Light/Sunload Sensor Malfunction.
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