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Pinpoint Test I: The Washer Pump Is Inoperative - TAURUS X

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. I1 CHECK CIRCUIT CRW14 (BU/WH) FOR GROUND 
    • Disconnect: Washer Pump Motor C137
    • Key in ON position.
    • Measure the resistance between washer pump motor C137-2, circuit CRW14 (BU/WH) harness side and ground.
      • Fig 1: Measuring Resistance
      GF0045512Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I3.
    2. NO  : Go to  I2.
  2. I2 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 2: Measuring Resistance
      GF0045511Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I14.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  3. I3 CHECK CIRCUIT GD120 (BK/GN) FOR GROUND 
    • Measure the resistance between washer pump motor C137-1, circuit GD120 (BK/GN) harness side and ground.
      • Fig 3: Measuring Resistance
      GF0045509Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I6.
    2. NO  : Go to  I4.
  4. I4 CHECK CIRCUIT GD120 (BK/GN) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Rear Window Wiper Motor C476
    • Measure the resistance between rear window wiper motor C476-6, circuit GD120 (BK/GN), harness side and washer pump motor C137-1, circuit GD120 (BK/GN) harness side.
      • Fig 4: Measuring Resistance
      GF0045513Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I5.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. I5 CHECK CIRCUIT GD133 (BK) FOR AN OPEN 
    • Measure the resistance between rear window wiper motor C476-5, circuit GD133 (BK), harness side and ground.
      • Fig 5: Measuring Resistance
      GF0041893Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I15.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  6. I6 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 6: Measuring Voltage
      GF0045510Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  I10.
    2. NO  : Go to  I7.
  7. I7 CHECK CIRCUIT CRW14 (BU/WH) FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: Windshield Wiper Motor C125
    • Measure the resistance between washer pump motor C137-2, circuit CRW14 (BU/WH) harness side and ground.
      • Fig 7: Measuring Resistance
      GF0045512Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  I8.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  8. I8 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  I9.
    2. NO  : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES article. TEST the system for normal operation.
  9. I9 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 8: 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  I14.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  10. I10 CHECK CIRCUIT GD120 (BK/GN) FOR VOLTAGE 
    • Measure the voltage between washer pump motor C137-1, circuit GD120 (BK/GN) harness side and ground while depressing the multi-function switch to the rear wash position.
      • Fig 9: Measuring Voltage
      GF0045514Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : INSTALL a new washer pump. TEST the system for normal operation.
    2. NO  : Go to  I11.
  11. I11 CHECK CIRCUIT GD120 (BK/GN) FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: Rear Window Wiper Motor C476
    • Measure the resistance between washer pump motor C137-1, circuit GD120 (BK/GN) harness side and ground.
      • Fig 10: Measuring Resistance
      GF0045509Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  I12.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  12. I12 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  I13.
    2. NO  : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES article. TEST the system for normal operation.
  13. I13 CHECK CIRCUIT CRW20 (GY/YE) FOR AN OPEN OR SHORT TO GROUND 
    • Measure the resistance between rear window wiper motor C476-7, circuit CRW20 (GY/YE) harness side and multi-function switch C202-14, circuit CRW20 (GY/YE) harness side; and between multi-function switch C202-14, circuit CRW20 (GY/YE) harness side and ground.
      • Fig 11: Measuring Resistance
      GF0045515Courtesy 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  I15.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  14. I14 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.
  15. I15 CHECK THE REAR WINDOW WIPER MOTOR 
    • Disconnect all wiper motor connectors.
    • Check for:
      • liftgate open.
      • 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 rear window wiper motor. REFER to Wiper Motor - Rear Window . TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
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