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Home >> Buick >> 2016 >> Cascada Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Wiper System And Washer System) >> Diagnostic Information and Procedures >> DTC B3715 or B3875: Windshield Wiper Relay Circuit >> Component Testing >> Relay Test
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Relay Test

WARNING: This page is about a different car, the 2016 Chevrolet Malibu Limited. However, it is still accessible from the selected car via links, so may be relevant.
  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
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