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Rear Wiper/Washer Switch Test

  1. Disconnect electrical connector at rear wiper motor module. Using voltmeter or ohmmeter, check for voltage or continuity at designated terminals of electrical connector as specified. Refer to Fig 1 .
  2. Check for voltage with ignition on. Check for continuity to ground with ignition off. If power is not present, check fuses or for open in harness. Repair as necessary. If switch is okay, replace rear wiper motor.
REAR WIPER MOTOR MODULE TERMINAL IDENTIFICATION

Terminal Color
A White
B Black
C Gray
Fig 1: Rear Wiper/Washer Switch Test Chart
G91A14506Courtesy of GENERAL MOTORS CORP.
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