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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 22 (Lighting System) >> Diagnostic Information and Procedures >> Rear Fog Lamps Malfunction >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, park lamps ON.
  2. Verify the scan tool Rear Fog Lamp Switch parameter changes between Active and Inactive while commanding the rear fog lamp ON and OFF with the rear fog lamp switch.
    • If the parameter does not change 

      Refer to Rear Fog Lamp Switch Malfunction.

    • If the parameter changes 
  3. Verify the rear fog lamps turn ON and OFF when commanding the Rear Fog Lamp ON and OFF with a scan tool.
    • If the rear fog lamps do not turn ON and OFF 

      Refer to Rear Fog Lamp Malfunction.

    • If the rear fog lamps turn ON and OFF 
  4. Verify the rear fog lamp indicator turns ON and OFF while commanding the rear fog lamp ON and OFF with the rear fog lamp switch.
    • If the rear fog lamp indicator does not turn ON and OFF 

      Refer to Rear Fog Lamp Indicator Malfunction.

    • If the rear fog lamp indicator turns ON and OFF 
  5. All OK.