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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 90 (Wiper System And Washer System) >> Diagnostic Information and Procedures >> DTC B3715 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X5 harness connector at the BCM.
  2. Ignition ON, verify that the low speed wipers are not on.
    • If the low speed wipers are on, test the WPR relay control circuit terminal 20 for a short to voltage. If the circuit tests normal, replace the underhood fuse block.
  3. Install a 10 A fused jumper wire between the WPR relay control circuit terminal 20 and B+. Verify the low speed wipers are on.
    • If the low speed wipers are not on, test the WPR relay control circuit for an open/high resistance or short to ground. If the circuit tests normal replace the underhood fuse block.
  4. If all circuits test normal, replace the BCM.
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