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Home >> Hummer >> 2009 >> H3 Base, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System And Washer System >> Diagnostic Information and Procedures >> Windshield Wiper Washer System Malfunction >> Component Testing >> Windshield Wiper Washer Switch High and Wash circuits
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Windshield Wiper Washer Switch High and Wash circuits

  1. Disconnect the steering column harness to I/P harness inline connector C201.
  2. Connect a DMM from the accessory voltage supply circuit terminal to the windshield wiper switch signal 2 circuit terminal in the steering column connector half.
  3. The DMM should indicate continuity while the wiper switch is in the High speed position.
    • If the DMM does not display 0-2 ohms replace the windshield wiper washer switch.
  4. The DMM should indicate no continuity while the wiper switch is in any position other than High.
    • If the DMM does not display infinite resistance replace the windshield wiper washer switch.
  5. Connect a DMM from the accessory voltage supply circuit terminal to the windshield washer pump control circuit terminal.
  6. The DMM should indicate continuity while the windshield washer switch is pressed.
    • If the DMM does not display 0-2 ohms replace the windshield wiper washer switch.
  7. The DMM should indicate no continuity when the windshield washer switch is released.
    • If the DMM does not display infinite resistance replace the windshield wiper washer switch.
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