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Wiper Motor

  1. Check motor operation before removing wiper assembly from vehicle. Disconnect wiring harness from wiper assembly. Apply a 12-volt source to wiper connector pins. See Fig 3 .
  2. If wiper motor runs in all operating modes (LO, HI, PARK and DELAY), perform voltage and continuity wiper switch tests. See Fig 1 -8. If wiper motor does not run in any or all operating modes, perform appropriate tests.
Fig 1: Wiper Motor
G109407Courtesy of GENERAL MOTORS CORP.
Fig 2: Testing Wiper Motor Operating Modes - Low Speed
G109408Courtesy of GENERAL MOTORS CORP.
Fig 3: Testing Wiper Motor Operating Modes - Park0
G109409Courtesy of GENERAL MOTORS CORP.
Fig 4: Testing Wiper Motor Operating Modes - Hi Speed
G109410Courtesy of GENERAL MOTORS CORP.
Fig 5: Testing Wiper Motor Operating Modes - Pulse
G109411Courtesy of GENERAL MOTORS CORP.
Fig 6: Checking Switch & Harness (On-Vehicle)
G109413Courtesy of GENERAL MOTORS CORP.
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