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Home >> Hummer >> 2009 >> H3 Base, Standard >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System And Washer System >> Diagnostic Information and Procedures >> DTC B3715, B3716, B3717, B3718, or B3719 >> Circuit/System Testing >> On/Off Wipe Relay Control Circuit Test

On/Off Wipe Relay Control Circuit Test

  1. Ignition OFF, disconnect the on/off wiper relay.
  2. Verify that a test lamp illuminates when connected from battery voltage to the relay coil ground circuit terminal 86.
    • If the test lamp does not illuminate test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the relay coil control circuit terminal 85 and the ground circuit terminal 86.
  4. Ignition ON, operate the front wiper switch between low and off and verify that the test lamp turns on and off.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  5. If all circuits test normal, test or replace the relay.
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