Circuit/System Verification
WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON.
- Verify the scan tool Rear Closure Ajar Switch parameter changes between Inactive and Active when opening and closing the liftgate.
- If the parameter does not change
Refer to Rear Hatch/Gate Ajar Indicator Malfunction (With TB5) , or Rear Hatch/Gate Ajar Indicator Malfunction (Without TB5)
- Go to next step: If the parameter changes
- If the parameter does not change
- Verify the rear wiper turns ON and OFF when commanding the Rear Wiper Active and Inactive with a scan tool.
- If the rear wiper does not turn ON and OFF
Refer to Circuit/System Testing
- Go to next step: If the rear wiper turns ON and OFF
- If the rear wiper does not turn ON and OFF
- All OK.