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Home >> Chevrolet >> 2017 >> Traverse LS Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System And Washer System >> Diagnostic Information and Procedures >> DTC B3875: Wiper High Speed Relay Circuit >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the WPR HI relay.
  2. Connect a test lamp between the control circuit terminal 86 and B+.
  3. Ignition ON, command the high speed wipers ON and OFF using the wiper switch. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.
    • If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
  4. If all circuits test normal, test or replace the WPR HI relay.
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