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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 326 (Fixed And MOVEABLE Window System) >> Diagnostic Information and Procedures >> Rear Window Defogger Malfunction >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition » On / Vehicle » In Service Mode
  2. Operate the component:Rear Defogger Switch»Pressed

    Verify the component turns On and Off:E18 Rear Defogger Grid

    • If the component does not turn On and Off 

      Refer to: Circuit/System Testing

    • If the component turns On and Off 
  3. Perform the scan tool control function:Illuminate All Indicators»On and Off

    Verify the component turns On and Off:Rear Defogger Indicator

    • If the component does not turn On and Off 

      Replace the component:P17 Info Display Module

    • If the component turns On and Off 
  4. All OK.
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