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Home >> GMC >> 2011 >> Acadia SL, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting System >> Diagnostic Information and Procedures >> Front Fog Lamps Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON, observe the scan tool Front Fog Lamps Switch parameter while turning the front fog lamps switch ON and OFF. The parameter should change between Active and Inactive.
    • If the parameter does not change between the commanded states, refer to Fog Lamp Switch Malfunction.
  2. Observe the scan tool Front Fog Lamps Relay Command parameter while turning the front fog lamps switch ON and OFF. The parameter should change between Active and Inactive.
    • If the parameter does not change between the commanded states, refer to Fog Lamps Malfunction.
  3. Command the Lamp Test ON and OFF with a scan tool. The fog lamps indicator should turn ON and OFF when changing between the commanded states.
    • If the fog lamps indicator illuminates during the test, replace the BCM.
    • If the fog lamps indicator does not illuminate during the test or remains illuminated at all times, replace the instrument cluster.
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