Pinpoint Test F: The Washer Pump is Inoperative
Wipers and Washers
Pinpoint Test F: The Washer Pump is Inoperative
Refer to Wiring Diagram Set 81 (Fusion/Milan/MKZ, Fusion Hybrid, Milan Hybrid, MKZ Hybrid), Wipers and Washers for schematic and connector information. Diagrams By Number
Normal Operation
The multifunction switch provides a ground signal to the wiper/washer module through circuit CRW07 (GY/BN) when the wash function is selected on the multifunction switch. When the wiper/washer module detects this input, the wiper/washer module activates an internal washer relay that provides voltage to the washer pump through circuit CRW14 (BU/WH). The washer pump is grounded through circuit GD123 (BK/GY).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Blocked washer hose/washer jet
- Multifunction switch
- Washer pump motor
- Wiper/washer module
PINPOINT TEST F: THE WASHER PUMP IS INOPERATIVE
NOTICE: 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.
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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.
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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 Washer Pump Service and Repair.
No
GO to F3.
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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.
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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?
Yes
GO to F6.
No
GO to F5.
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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 Steering Column Switches Steering Column Multifunction Switch. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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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 Wiper/Washer Module Service and Repair.
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.
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