Pinpoint Test H: The Washer Pump Is Inoperative

Wipers and Washers

Pinpoint Tests

Pinpoint Test H: The Washer Pump is Inoperative - Taurus or Sable

Refer to Wiring Diagram Set 81, Wipers and Washers for schematic and connector information. Diagrams By Number

Normal Operation

Under normal operation, the multifunction switch provides input to the windshield wiper motor through circuit CRW07 (GY/BN) to activate the windshield washer. The windshield wiper motor activates the internal relay and then provides power to the washer pump through circuit CRW14 (BU/WH). The washer pump is grounded through circuit GD120 (BK/GN).

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Multifunction switch
- Washer pump motor
- Windshield wiper motor



PINPOINT TEST H: THE WASHER PUMP IS INOPERATIVE - TAURUS OR SABLE

-------------------------------------------------
H1 CHECK CIRCUIT GD120 (BK/GN) FOR GROUND


- Disconnect: Washer Pump Motor C137.
- Ignition OFF.
- Measure the resistance between washer pump motor C137-1, circuit GD120 (BK/GN) harness side and ground.




- Is the resistance less than 5 ohms?

Yes
GO to H2.

No
REPAIR the circuit. TEST the system for normal operation.

-------------------------------------------------
H2 CHECK CIRCUIT CRW14 (BU/WH) FOR VOLTAGE


- Ignition ON.
- Measure the voltage between washer pump motor C137-2, 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 Washer Pump.

No
GO to H3.

-------------------------------------------------
H3 CHECK THE MULTIFUNCTION SWITCH


- Disconnect: Multifunction Switch C202.
- Carry out the Multifunction Switch Component Test.

- Did the multifunction switch pass the component test?

Yes
GO to H4.

No
INSTALL a new multifunction switch. TEST the system for normal operation.

-------------------------------------------------
H4 CHECK CIRCUIT CRW07 (GY/BN) FOR AN OPEN OR SHORT TO GROUND


- Measure the resistance between windshield wiper motor C125-12, circuit CRW07 (GY/BN) harness side and multifunction switch C202-10, circuit CRW07 (GY/BN) harness side; and between multifunction switch C202-10, circuit CRW07 (GY/BN) harness side and ground.




- Is the resistance less than 5 ohms between multifunction switch and wiper motor; and greater than 10,000 ohms between multifunction switch and ground?

Yes
GO to H5.

No
REPAIR the circuit. TEST the system for normal operation.

-------------------------------------------------
H5 CHECK CIRCUIT CRW14 (BU/WH) FOR AN OPEN


- Ignition OFF.
- Disconnect: Windshield Wiper Motor C125.
- Measure the resistance between windshield wiper motor C125-7, circuit CRW14 (BU/WH), harness side and washer pump motor C137-2, circuit CRW14 (BU/WH) harness side.




- Is the resistance less than 5 ohms?

Yes
GO to H6.

No
REPAIR the circuit. TEST the system for normal operation.

-------------------------------------------------
H6 CHECK THE WINDSHIELD WIPER MOTOR


- 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
INSTALL a new windshield wiper motor. REFER to Wiper Motor - Windshield Wiper Motor - Windshield. TEST the system for normal operation.

No
REPAIR the circuit. TEST the system for normal operation.

-------------------------------------------------