Pinpoint Test F: The Washer Pump Is Inoperative
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- F1 CHECK WASHER PUMP MOTOR FOR GROUND
- Disconnect: Washer Pump Motor C137.
- Ignition OFF.
- Measure the resistance between washer pump motor C137-2, circuit GD123 (BK/GY) harness side and ground.
- Is the resistance less than 5 ohms?
- Yes: GO to F2.
- No: REPAIR the circuit. TEST the system for normal operation.
- F2 CHECK WASHER PUMP MOTOR FOR VOLTAGE
- Ignition ON.
- Measure the voltage between washer pump motor C137-1, circuit CRW14 (BU/WH), harness side and ground while depressing the multifunction switch to the WASH position.
- Is the voltage greater than 10 volts?
- Yes: INSTALL a new washer pump. REFER to Removal and Installation .
- No: GO to F3.
- F3 CHECK WASHER PUMP MOTOR VOLTAGE CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Wiper/Washer Module C2157.
- Measure the resistance between wiper/washer module C2157-3, circuit CRW14 (BU/WH), harness side and washer pump motor C137-1, circuit CRW14 (BU/WH), harness side.
- Is the resistance less than 5 ohms?
- Yes: GO to F4.
- No: REPAIR the circuit. TEST the system for normal operation.
- F4 CHECK MULTIFUNCTION SWITCH WASHER OUTPUT CIRCUIT
- Measure the resistance between wiper/washer module C2157-5, circuit CRW07 (GY/BN) harness side and ground while depressing the multifunction switch to the WASH position.
- Is the resistance less than 5 ohms?
- F5 CHECK MULTIFUNCTION SWITCH OUTPUT CIRCUIT FOR AN OPEN
- Disconnect: Multifunction Switch C202.
- Measure the resistance between wiper/washer module C2157-5, circuit CRW07 (GY/BN), harness side and multifunction switch C202-10, circuit CRW07 (GY/BN), harness side.
- Is the resistance less than 5 ohms?
- Yes: INSTALL a new multifunction switch. REFER to REMOVAL AND INSTALLATION . TEST the system for normal operation.
- No: REPAIR the circuit. TEST the system for normal operation.
- F6 CHECK FOR CORRECT WIPER/WASHER MODULE OPERATION
- Disconnect all wiper/washer module connectors.
- Check for:
- corrosion.
- pushed-out pins.
- Connect all wiper/washer module 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 wiper/washer module. REFER to Removal and Installation .
- 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.