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Pinpoint Test H: The Washer Pump Is Inoperative - TAURUS Or Sable

WARNING: This page is about a different car, the 2008 Mercury Sable, 2008 Ford Taurus X, and 2008 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
  1. H1 CHECK CIRCUIT GD120 (BK/GN) FOR GROUND 
    • Disconnect: Washer Pump Motor C137
    • Key in OFF position.
    • Measure the resistance between washer pump motor C137-1, circuit GD120 (BK/GN) harness side and ground.
      • Fig 1: Measuring Resistance
      GF0045509Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  H2.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  2. H2 CHECK CIRCUIT CRW14 (BU/WH) FOR VOLTAGE 
    • Key in ON position.
    • Measure the voltage between washer pump motor C137-2, circuit CRW14 (BU/WH) harness side and ground while depressing the multi-function switch to the wash position.
      • Fig 2: Measuring Voltage
      GF0045510Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : INSTALL a new washer pump. REFER to Washer Pump .
    2. NO  : Go to  H3.
  3. H3 CHECK THE MULTI-FUNCTION SWITCH 
    • Disconnect: Multi-Function Switch C202
    • Carry out the Multi-Function Switch Component Test. Refer to appropriate COMPONENT TESTING article.
    • Did the multi-function switch pass the component test? 
    1. YES  : Go to  H4.
    2. NO  : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES article. TEST the system for normal operation.
  4. H4 CHECK CIRCUIT CRW07 (GY/BN) FOR AN OPEN OR SHORT TO GROUND 
    • Measure the resistance between windshield wiper motor C125-12, circuit CRW07 (GY/BN) harness side and multi-function switch C202-10, circuit CRW07 (GY/BN) harness side; and between multi-function switch C202-10, circuit CRW07 (GY/BN) harness side and ground.
      • Fig 3: Checking Circuit For Open Or Short To Ground
      GF0021751Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms between multi-function switch and wiper motor; and greater than 10,000 ohms between multi-function switch and ground? 
    1. YES  : Go to  H5.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. H5 CHECK CIRCUIT CRW14 (BU/WH) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Windshield Wiper Motor C125
    • Measure the resistance between windshield wiper motor C125-7, circuit CRW14 (BU/WH), harness side and washer pump motor C137-2, circuit CRW14 (BU/WH) harness side.
      • Fig 4: Measuring Resistance
      GF0045511Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  H6.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  6. H6 CHECK THE WINDSHIELD WIPER MOTOR 
    • Disconnect all wiper motor connectors.
    • Check for:
      • corrosion.
      • pushed-out pins.
    • Connect all wiper motor connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new windshield wiper motor. REFER to Wiper Motor - Windshield . TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
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