Pinpoint Test J: The Washer Pump Is Inoperative: Testing

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

J1 CHECK CIRCUIT 28 (BK/PK) OR 485 (PK/BK) FOR GROUND
- Disconnect: Windshield Wiper Motor C125.
- Disconnect: Rear Window Wiper Motor C476 (Freestyle only).
- For the windshield washer, measure the resistance between windshield wiper motor C125-9, circuit 28 (BK/PK), harness side and ground while depressing the wiper switch to the windshield wiper wash position.
  
  Fig 1: Measuring Resistance Between Windshield Wiper Motor C125-9, Circuit 28 (BK/PK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- For the rear window washer (Freestyle only), measure the resistance between rear window wiper motor C476-7, circuit 485 (PK/BK), harness side and ground while depressing the wiper switch to the rear window wash position.
  
  Fig 2: Measuring Resistance Between Rear Window Wiper Motor C476-7, Circuit 485 (PK/BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to J3.
- No : GO to J2.
J2 CHECK THE WIPER SWITCH
- Disconnect: Wiper Switch C202a.
  Carry out the wiper switch component test. Refer to COMPONENT TESTING .
- Did the wiper switch pass the component test?
- Yes : GO to J3.
- No : INSTALL a new wiper switch. REFER to STEERING COLUMN SWITCHES .
J3 CHECK CIRCUIT 941 (BK/WH) FOR GROUND
- Key in OFF position.
- Connect: Windshield Wiper Motor C125.
- Disconnect: Washer Pump Motor C1397.
- Measure the resistance between C1397-1, circuit 941 (BK/WH) harness side and ground.
  
  Fig 3: Measuring Resistance Between C1397-1, Circuit 941 (BK/WH) Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to J4.
- No : GO to J8.
J4 CHECK CIRCUIT 946 (VT/LG) OR 1205 (BK) FOR GROUND
- For Freestyle, measure the resistance between C1397-2, circuit 946 (VT/LG) harness side and ground.
  
  Fig 4: Measuring Resistance Between Connector Terminal And Ground
  Courtesy of FORD MOTOR CO.
- For Five Hundred and Montego, measure the resistance between C1397-2, circuit 1205 (BK) harness side and ground.
  
  Fig 5: Measuring Resistance Between Connector Terminal And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : For Freestyle, GO to J5. For Five Hundred and Montego, GO to J6.
- No : For Freestyle, GO to J7. For Five Hundred and Montego, REPAIR the circuit. TEST the system for normal operation.
J5 CHECK CIRCUIT 946 (VT/LG) FOR VOLTAGE
- Key in ON position.
- Measure the voltage between C1397-2, circuit 946 (VT/LG) harness side and ground while depressing the wiper switch to the rear wiper wash position.
  
  Fig 6: Measuring Voltage Between C1397-2, Circuit 946 (VT/LG) Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to J6.
- No : GO to J9.
J6 CHECK CIRCUIT 941 (PK/LG) FOR VOLTAGE
- Key in OFF position.
- Connect: Rear Window Wiper Motor C476.
- Key in ON position.
- Measure the voltage between C1397-1, circuit 941 (PK/LG) harness side and ground while depressing the multifunction switch to the windshield wiper wash position.
- Is the voltage greater than 10 volts?
- Yes : INSTALL a new washer pump motor. REFER to WINDSHIELD WASHER PUMP AND RESERVOIR . TEST the system for normal operation.
- No : GO to J9.
J7 CHECK CIRCUIT 946 (PK/LG) FOR OPEN
- Disconnect: Rear Wiper Motor C476.
- Measure the resistance between rear window wiper motor C476-7, circuit 946 (PK/LG), harness side and C1397-2, circuit 946 (PK/LG), harness side.
- Is the resistance less than 5 ohms?
- Yes : GO to J9.
- No : REPAIR the circuit. TEST the system for normal operation.
J8 CHECK CIRCUIT 941 (BK/WH) FOR OPEN
- Key in OFF position.
- Disconnect: Windshield Wiper Motor C125.
- Measure the resistance between windshield wiper motor C125-7, circuit 941 (BK/WH), harness side and washer pump C1397-1, circuit 941 (BK/WH), harness side.
  
  Fig 7: Measuring Resistance Between Windshield Wiper Motor C125-7, Circuit 941 (BK/WH), Harness Side And Washer Pump C1397-1, Circuit 941 (BK/WH)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : For the windshield wiper motor, GO to J9. For the rear window wiper motor (Freestyle only), GO to J10.
- No : REPAIR the circuit. TEST the system for normal operation.
J9 CHECK FOR CORRECT REAR WINDOW WIPER MOTOR OPERATION
- Disconnect all rear window wiper motor connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect the rear window wiper motor connectors and make sure they are seated 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 WINDSHIELD WIPER MOTOR . TEST the system for normal operation.
- 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.
J10 CHECK FOR CORRECT WIPER MOTOR OPERATION
- Disconnect the windshield wiper motor connector.
- Check for:
  - corrosion
  - pushed-out pins
- Connect the windshield wiper motor connectors and make sure they are seated 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 WINDSHIELD WIPER MOTOR . TEST the system for normal operation.
- 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.