Pinpoint Test H: The Washer Pump Is Inoperative

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

H1 CHECK CIRCUIT CRW14 (BU/WH) FOR GROUND
- Disconnect: Washer Pump Motor C137.
- Ignition ON.
- Measure the resistance between washer pump motor C137-2, circuit CRW14 (BU/WH) harness side and ground.
  
  Fig 1: Measuring Resistance Between Washer Pump Motor C137-2, Circuit CRW14 (BU/WH) Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to H3.
- No: GO to H2 .
H2 CHECK CIRCUIT CRW14 (BU/WH) FOR AN OPEN
- Ignition OFF.
- Disconnect: Windshield Wiper Motor C1552.
- Measure the resistance between windshield wiper motor C1552-7, circuit CRW14 (BU/WH), harness side and washer pump motor C137-2, circuit CRW14 (BU/WH), harness side.
  
  Fig 2: Checking Circuit CRW14 (BU/WH) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to H13.
- No: REPAIR the circuit. TEST the system for normal operation.
H3 CHECK CIRCUIT CRW23 (VT/GN) FOR GROUND
- Measure the resistance between washer pump motor C137-1, circuit CRW23 (VT/GN) harness side and ground.
  
  Fig 3: Measuring Resistance Between Washer Pump Motor C137-1, Circuit CRW23 (VT/GN) Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to H5.
- No: GO to H4 .
H4 CHECK CIRCUIT CRW23 (VT/GN) FOR AN OPEN
- Ignition OFF.
- Disconnect: Rear Window Wiper Motor C4218.
- Measure the resistance between rear window wiper motor C4218-7, circuit CRW23 (VT/GN), harness side and washer pump motor C137-1, circuit CRW23 (VT/GN), harness side.
  
  Fig 4: Checking Circuit CRW23 (VT/GN) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to H14.
- No: REPAIR the circuit. TEST the system for normal operation.
H5 CHECK CIRCUIT CRW14 (BU/WH) FOR VOLTAGE
NOTE: Holding the multifunction switch to the windshield wiper WASH position for greater than 10 seconds will default the washer system to OFF for that ignition cycle.
- Ignition ON.
- Measure the voltage between washer pump motor C137-2, circuit CRW14 (BU/WH) harness side and ground while depressing the multifunction switch to the windshield wiper WASH position.
  
  Fig 5: Checking Circuit CRW14 (BU/WH) For Voltage
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to H9.
- No: GO to H6 .
H6 CHECK CIRCUIT CRW14 (BU/WH) FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: Windshield Wiper Motor C1552.
- Measure the resistance between washer pump motor C137-2, circuit CRW14 (BU/WH), harness side and ground.
  
  Fig 6: Measuring Resistance Between Washer Pump Motor C137-2, Circuit CRW14 (BU/WH), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes: GO to H7 .
- No: REPAIR the circuit. TEST the system for normal operation.
H7 CHECK THE MULTIFUNCTION SWITCH
- Ignition OFF.
- Disconnect: Multifunction Switch C202.
- Carry out the Multifunction Switch Component Test.
  Refer to COMPONENT TESTING for component testing.
- Did the multifunction switch pass the component test?
- Yes: GO to H8 .
- No: INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES .
H8 CHECK CIRCUIT CRW07 (GY/BN) FOR AN OPEN OR SHORT TO GROUND
- Measure the resistance between windshield wiper motor C1552-12, circuit CRW07 (GY/BN), harness side and multifunction switch C202-10, circuit CRW07 (GY/BN), harness side; and between multifunction switch C202-10, circuit CRW07 (GY/BN), harness side and ground.
  
  Fig 7: Checking Circuit CRW07 (GY/BN) For An Open Or Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms between multifunction switch and wiper motor; and greater than 10,000 ohms between multifunction switch and ground?
- Yes: GO to H13.
- No: REPAIR the circuit. TEST the system for normal operation.
H9 CHECK CIRCUIT CRW23 (VT/GN) FOR VOLTAGE
- Measure the voltage between washer pump motor C137-1, circuit CRW23 (VT/GN) harness side and ground while depressing the multifunction switch to the rear window wiper WASH position.
  
  Fig 8: Checking Circuit CRW23 (VT/GN) For Voltage
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: INSTALL a new washer pump. REFER to WASHER PUMP . TEST the system for normal operation.
- No: GO to H10 .
H10 CHECK CIRCUIT CRW23 (VT/GN) FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: Rear Window Wiper Motor C4218.
- Measure the resistance between washer pump motor C137-1, circuit CRW23 (VT/GN), harness side and ground.
  
  Fig 9: Measuring Resistance Between Washer Pump Motor C137-1, Circuit CRW23 (VT/GN), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes: GO to H11 .
- No: REPAIR the circuit. TEST the system for normal operation.
H11 CHECK THE MULTIFUNCTION SWITCH
- Ignition OFF.
- Disconnect: Multifunction Switch C202.
- Carry out the Multifunction Switch Component Test.
  Refer to COMPONENT TESTING for component testing.
- Did the multifunction switch pass the component test?
- Yes: GO to H12 .
- No: INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES .
H12 CHECK CIRCUIT CRW20 (GY/YE) FOR AN OPEN OR SHORT TO GROUND
- Measure the resistance between windshield wiper motor C4218-4, circuit CRW20 (GY/YE), harness side and multifunction switch C202-14, circuit CRW20 (GY/YE), harness side; and between multifunction switch C202-14, circuit CRW20 (GY/YE), harness side and ground.
  
  Fig 10: Checking Circuit CRW20 (GY/YE) For An Open Or Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms between multifunction switch and wiper motor; and greater than 10,000 ohms between multifunction switch and ground?
- Yes: GO to H14.
- No: REPAIR the circuit. TEST the system for normal operation.
H13 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?
- Yes: INSTALL a new windshield wiper motor. REFER to WIPER MOTOR - WINDSHIELD .
- No: The system is operating correctly at this time. Concern may have been caused by binding or incorrect pivot arm adjustment. REFER to WIPER BLADE AND PIVOT ARM ADJUSTMENT - WINDSHIELD . TEST the system for normal operation.
H14 CHECK THE REAR WINDOW 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?
- Yes: INSTALL a new rear window wiper motor. REFER to WIPER MOTOR - REAR WINDOW .
- No: The system is operating correctly at this time. Concern may have been caused by binding or incorrect pivot arm adjustment. REFER to WIPER BLADE AND PIVOT ARM ADJUSTMENT - REAR WINDOW . TEST the system for normal operation.