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Wiper Motor Testing

  1. Remove wiper motor. Apply battery voltage and ground to designated terminals in accordance with switch position. It may be necessary to use a 1/2 watt (680 ohm) resistor. See Fig 1 .
  2. A test washer pump may be connected during test procedure. DO NOT use pump from vehicle. When using washer pump, DO NOT hold WASH button longer than 15 seconds each 2 minute interval. If wiper motor does not operate in all modes, replace wiper motor.
Fig 1: Testing Wiper Motor
G90I13571Courtesy of GENERAL MOTORS CORP.
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