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 Windshield Wiper High Speed Switch parameter changes between Active and Inactive when activating the high speed windshield wipers.
- If the parameter does not change
  Refer to Circuit/System Testing - Windshield Wiper/Washer Switch Malfunction.
- Go to next step: If the parameter changes
Verify the scan tool Windshield Wiper Switch parameter changes between Off and Low when activating the low speed windshield wipers.
- If the parameter does not change
  Refer to Circuit/System Testing - Windshield Wiper/Washer Switch Malfunction.
- Go to next step: If the parameter changes
Verify the scan tool Windshield Wiper Switch parameter changes between Delay 1 and Delay 5 when cycling the intermittent speed windshield wipers.
- If the parameter does not change
  Test or replace the S82 Windsheild Wiper/Washer Switch.
- Go to next step: If the parameter changes
Verify the M75 Windshield Wiper Motor changes between Off, Low, and High when cycling the S82 Windshield Wiper/Washer Switch between Off, Low, and High.
- If the M75 Windshield Wiper Motor does not cycle between Off, Low, and High
  Refer to Circuit/System Testing - Windshield Wiper Motor Malfunction
- Go to next step: If the M75 Windshield Wiper Motor cycles between Off, Low, and High
Ignition OFF.
Verify the scan tool Windshield Wiper Park Switch parameter is Active.
- If the parameter does not change
  Refer to Circuit/System Testing - Windshield Wiper Motor Malfunction.
- Go to next step: If the parameter changes
All OK.