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Home >> Buick >> 2017 >> Envision Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System And Washer System >> Diagnostic Information and Procedures >> DTC B3810: Headlamp Washer Relay Circuit >> Component Testing

Component Testing

Relay Test

  1. Ignition OFF, disconnect the KR2 headlamp washer pump relay.
  2. Test for 60 - 200 Ω between terminals 2 and 1.
    • If less than 60 or greater than 200 

      Replace the KR2 headlamp washer pump relay.

    • If between 60 - 200 Ω 
  3. Test for infinite resistance between the terminals listed below:
    • 3 and 1
    • 3 and 5
    • 3 and 2
    • 2 and 5
    • If less than infinite resistance 

      Replace the KR2 headlamp washer pump relay.

    • If infinite resistance 
  4. Install a 10 A fused jumper wire between relay terminal 2 and 12 V. Install a jumper wire between relay terminal 1 and ground.
  5. Test for less than 10 Ω between terminals 3 and 5.
    • If 10 Ω or greater 

      Replace the KR2 headlamp washer pump relay.

    • If less than 10 Ω 
  6. All OK.