Pinpoint Test Av: The Washer Pump Is Inoperative - Front Or Rear

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.

AV1 CHECK FOR VOLTAGE AT THE INOPERATIVE WASHER MOTOR
- Disconnect: Washer Motor C137 (Windshield) or C1097 (Rear).
- Key in ON position.
- While holding the washer switch in the ON position, measure the voltage between the windshield washer motor C137-1 circuit 941 (BK/WH), harness side and ground; or measure the voltage between the rear washer motor C1097-1 circuit 946 (VT/LG), harness side and ground.
  
  Fig 1: Checking For Voltage At Inoperative Washer Motor
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes

GO to AV6.

No

GO to AV2
AV2 CHECK THE MULTIFUNCTION SWITCH
- Key in OFF position.
- Disconnect: Multifunction Switch C202b.
- Check the multifunction switch for correct operation.
  Refer to COMPONENT TESTING for schematic and connector information.
- Did the multifunction switch pass the component test?
Yes

If the front washer is inoperative, GO to AV3.

If the rear washer is inoperative, GO to AV5.

No

INSTALL a new multifunction switch. Refer to STEERING COLUMN SWITCHES . TEST the system for normal operation.
AV3 CHECK CIRCUIT 941 (BK/WH) FOR AN OPEN OR SHORT TO GROUND
- Key in OFF position.
- Disconnect: Windshield Wiper Motor C125.
- Measure the resistance between the windshield wiper motor C125-7 circuit 941 (BK/WH), harness side and the windshield washer motor C137-1 circuit 941 (BK/WH), harness side; then between the windshield wiper motor C125-7 circuit 941 (BK/WH), harness side and ground.
  
  Fig 2: Checking Circuit 941 (BK/WH) For An Open Or Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms between the wiper motor and washer motor; and greater than 10,000 ohms between the wiper motor and ground?
Yes

GO to AV4.

No

REPAIR the circuit. TEST the system for normal operation.
AV4 CHECK CIRCUIT 950 (WH/BK) FOR AN OPEN OR SHORT TO GROUND
- Measure the resistance between the multifunction switch C202b-7 circuit 950 (WH/BK), harness side and the windshield wiper motor C125-12 circuit 950 (WH/BK), harness side; then between the multifunction switch C202b-7 circuit 950 (WH/BK), harness side and ground.
  
  Fig 3: Checking Circuit 950 (WH/BK) For An Open Or Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms between the multifunction switch and wiper motor; and greater than 10,000 ohms between the multifunction switch and ground?
Yes

INSTALL a new windshield wiper motor. Refer to WINDSHIELD WIPER . TEST the system for normal operation.

No

REPAIR the circuit. TEST the system for normal operation.
AV5 CHECK CIRCUIT 946 (VT/LG) FOR AN OPEN OR SHORT TO GROUND
- Key in OFF position.
- Disconnect: Rear Wiper Motor C476.
- Measure the resistance between the rear wiper motor C476-7 circuit 946 (VT/LG), harness side and the rear washer motor C1097-1 circuit 946 (VT/LG), harness side; then between the rear wiper motor C476-7 circuit 946 (VT/LG), harness side and ground.
  
  Fig 4: Checking Circuit 946 (VT/LG) For An Open Or Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms between the wiper motor and washer motor; and greater than 10,000 ohms between the wiper motor and ground?
Yes

INSTALL a new rear wiper motor. Refer to REAR WINDOW WIPER . TEST the system for normal operation.

No

REPAIR the circuit. TEST the system for normal operation.
AV6 CHECK THE GROUND CIRCUIT FOR THE INOPERATIVE WASHER MOTOR
- Measure the resistance between the windshield washer motor C137-2 circuit 1205 (BK) harness side and ground; or between the rear washer motor C1097-2 circuit 1205 (BK), harness side and ground.
  
  Fig 5: Checking Ground Circuit For Inoperative Washer Motor
  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.