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Home >> Cadillac >> 2017 >> XTS Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System And Washer System >> Diagnostic Information and Procedures >> DTC B3715 or B3875: Windshield Wiper Relay Circuits >> Component Testing
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Component Testing

Windshield Wiper/Washer Switch

  1. Ignition OFF, disconnect the harness connector at the S82 Windshield Wiper/Washer Switch.
  2. Test for infinite resistance between the signal terminal 1 and the low reference terminal 2 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 1 and the low reference circuit terminal 2 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 2 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. Verify the resistance readings are within the specified range listed below between the signal circuit terminal 3 and the low reference circuit terminal 1 by pushing the switch in the listed positions below.
    • Delay 1 : 3.75-3.85 kΩ
    • Delay 2 : 2.75-2.85 kΩ
    • Delay 3 : 1.95-2.05 kΩ
    • Delay 4 : 1.25-1.35 kΩ
    • Delay 5 : 765-775 Ω
    • If not within the specified range 

      Replace the S82 Windshield Wiper/Washer Switch.

    • If within the specified range 
  6. All OK

Relay Test

  1. Ignition OFF, disconnect the appropriate relay.
  2. Test for 60 - 200 Ω between terminals 85 and 86.
    • If less than 60 or greater than 200 

      Replace the relay.

    • If between 60 - 200 Ω 
  3. Test for infinite resistance between the terminals listed below:
    • 30 and 86
    • 30 and 87
    • 30 and 85
    • 85 and 87
    • If less than infinite resistance 

      Replace the relay.

    • If infinite resistance 
  4. Test for less than 5 Ω between terminals 30 and 87A.
    • If 5 Ω or greater 

      Replace the relay.

    • If less than 5 Ω 
  5. Install a 10 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground.
  6. Test for less than 5 Ω between terminals 30 and 87.
    • If 5 Ω or greater 

      Replace the relay.

    • If less than 5 Ω 
  7. All OK