Circuit/System Verification

Ignition » On / Vehicle» In Service Mode
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
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: A26 HVAC Controls
- If the component turns On and Off
All OK.