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Home >> Buick >> 2019 >> Envision Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System And Washer System >> Diagnostic Information and Procedures >> Windshield Wiper System Malfunction >> Component Testing

Component Testing

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.

    • Go to next step: 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.

    • Go to next step: 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.

    • Go to next step: 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.

    • Go to next step: If within the resistance values listed 
  6. All OK

Relay Test

  1. Ignition OFF, disconnect the appropriate relay.
  2. Test for 60 - 200 Ω between terminals 1 and 2.
    • If less than 60 or greater than 200 

      Replace the relay.

    • Go to next step: If between 60 - 200 Ω 
  3. Test for infinite resistance between the terminals listed below:
    • 3 and 2
    • 3 and 5
    • 3 and 2
    • 2 and 5
    • If less than infinite resistance 

      Replace the relay.

    • Go to next step: If infinite resistance 
  4. Test for less than 5 Ω between terminals 3 and 4.
    • If 5 Ω or greater 

      Replace the relay.

    • Go to next step: If less than 5 Ω 
  5. Install a 10 A fused jumper wire between relay terminal 1 and 12 V. Install a jumper wire between relay terminal 2 and ground.
  6. Test for less than 5 Ω between terminals 3 and 5.
    • If 5 Ω or greater 

      Replace the relay.

    • Go to next step: If less than 5 Ω 
  7. All OK
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