Pinpoint Test F: The Washer Pump Is Inoperative

WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

F1 CHECK THE WASHER PUMP MOTOR FOR VOLTAGE
- Key in OFF position.
- Disconnect: Washer Pump Motor C137.
- Key in ON position.
- Measure the voltage between washer pump motor C137 pin 1, circuit 941 (BK/WH) harness side and ground while depressing the multifunction switch to the wash position.
  
  Fig 1: Measuring Voltage Between Washer Pump Motor Pin 1 And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to F2.
- No : GO to F3.
F2 CHECK CIRCUIT 57 (BK) FOR GROUND
- Measure the resistance between washer pump motor C137 pin 2, circuit 57 (BK) harness side and ground.
  
  Fig 2: Measuring Resistance Between Washer Pump Motor Pin 2 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a new washer pump. REFER to WINDSHIELD WASHER PUMP AND RESERVOIR .
- No : REPAIR the circuit. TEST the system for normal operation.
F3 CHECK CIRCUIT 941 (BK/WH) FOR AN OPEN
- Key in OFF position.
- Disconnect: Windshield Wiper Motor C125.
- Measure the resistance between windshield wiper motor C125 pin 7, circuit 941 (BK/WH), harness side and washer pump motor C137 pin 1, circuit 941 (BK/WH), harness side.
  
  Fig 3: Measuring Resistance Between Windshield Wiper Motor Pin 7 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to F4.
- No : REPAIR the circuit. TEST the system for normal operation.
F4 CHECK THE MULTIFUNCTION SWITCH
- Key in OFF position.
- Disconnect: Multifunction Switch C202c.
- 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 F5.
- No : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES .
F5 CHECK CIRCUIT 938 (BK/LG) FOR AN OPEN
- Measure the resistance between multifunction switch C202c pin 5, circuit 938 (BK/LG), harness side and ground.
  
  Fig 4: Measuring Resistance Between Multifunction Switch Pin 5 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to F6.
- No : REPAIR the circuit. TEST the system for normal operation.
F6 CHECK CIRCUIT 680 (LB/OG) FOR AN OPEN
- Measure the resistance between windshield wiper motor C125 pin 12, circuit 589 (OG), harness side and multifunction switch C202c pin 2, circuit 680 (LB/OG), harness side.
  
  Fig 5: Measuring Resistance Between Windshield Wiper Motor Pin 12 Harness Side And Multifunction Switch Pin 2 Harness Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to F7.
- No : REPAIR the circuit. TEST the system for normal operation.
F7 CHECK FOR CORRECT WIPER MOTOR OPERATION
- 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 : GO to F8.
- No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. TEST the system for normal operation.
F8 CHECK THE WINDSHIELD WIPER MOTOR
- Key in OFF position.
- Disconnect: Windshield Wiper Motor C125.
- Carry out the windshield wiper motor component test as outlined in this article.
- Did the windshield wiper motor pass the component test?
- Yes : The system is operating correctly at this time. Concern may have been caused by binding or incorrect pivot arm adjustment. REFER to WINDSHIELD WIPER BLADE AND PIVOT ARM ADJUSTMENT . TEST the system for normal operation.
- No : INSTALL a new windshield wiper motor. REFER to WINDSHIELD WIPER MOTOR .