Wiper Motor Test

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 1 .
If wiper motor runs in all operating modes (LO, HI, PARK and PULSE), perform voltage and continuity wiper switch tests. See Fig 6 . If wiper motor does not run in any or all operating modes, perform appropriate tests.

Fig 1: Testing Wiper Motor Operating Modes (1 of 5)

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Courtesy of GENERAL MOTORS CORP.

Fig 2: Testing Wiper Motor Operating Modes (2 of 5)

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Courtesy of GENERAL MOTORS CORP.

Fig 3: Testing Wiper Motor Operating Modes (3 of 5)

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Courtesy of GENERAL MOTORS CORP.

Fig 4: Testing Wiper Motor Operating Modes (4 of 5)

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Courtesy of GENERAL MOTORS CORP.

Fig 5: Testing Wiper Motor Operating Modes (5 of 5)

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Courtesy of GENERAL MOTORS CORP.

Fig 6: Checking Switch & Harness (On Vehicle)

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Courtesy of GENERAL MOTORS CORP.

NOTE: For terminal and connector reference during wiper tests, see Fig 7 or appropriate chassis wiring diagram in WIRING DIAGRAMS Section.

Fig 7: Identifying Wiper Motor Module Connectors Terminals

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Courtesy of GENERAL MOTORS CORP.