Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Buick >> 2021 >> Envision Preferred, AWD >> Repair and Diagnosis >> Body & Frame >> Fixed And MOVEABLE Windows >> Diagnostic Information and Procedures >> DTC B1066 >> Circuit/System Verification

Circuit/System Verification

  1. Ignition - On/Vehicle - In Service Mode
  2. Operate the component: S59 Rear Defogger Switch - Pressed

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

    • If the component does not turn On and Off 

      Refer to: Circuit/System Testing

    • Go to next step: If the component turns On and Off 
  3. A fault that is not currently present may have been caused by a intermittent condition.
scientia non olet · About Mike's Workshop Manuals