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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 346 (Wiper System And Washer System) >> Diagnostic Information and Procedures >> Windshield Wiper System Malfunction >> Component Testing

Component Testing

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.

Windshield Wiper Switch

  1. Ignition OFF, disconnect the harness connector at the S82 Windshield Wiper/Washer Switch.
  2. Test for infinite resistance between the signal terminal 2 and the low reference terminal 1 with the high speed switch in the open position.
    • If less than infinite resistance 

      Replace the S82 Windshield Wiper/Washer Switch.

    • If infinite resistance 
  3. Test for less than 2 Ω between the signal circuit terminal 2 and the low reference circuit terminal 1 with the high speed switch in the closed position.
    • If 2 Ω or greater 

      Replace the S82 Windshield Wiper/Washer Switch.

    • If less than 2 Ω 
  4. Test for infinite resistance between the signal terminal 3 and the low reference terminal 1 with the low speed switch in the open position.
    • If less than infinite resistance 

      Replace the S82 Windshield Wiper/Washer Switch.

    • If infinite resistance 
  5. Test for the resistance values listed below between the signal circuit terminal 3 and the low reference circuit terminal 1 by cycling the switch between Delay 1 and Delay 5.
    • Delay 1 : 7.50-8.00kΩ
    • Delay 2 : 1.29-1.34kΩ
    • Delay 3 : 1.95-2.00kΩ
    • Delay 4 : 2.78-2.82kΩ
    • Delay 5 :3.84-3.90kΩ
    • If not within the resistance values listed 

      Replace the S82 Windshield Wiper/Washer Switch.

    • If within the resistance values listed 
  6. All OK