Pinpoint Test E: The Washer Pump Is Inoperative

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

E1 CHECK THE WASHER PUMP MOTOR FOR VOLTAGE
- Key in OFF position.
- Disconnect: Windshield Washer Pump C137.
- Key in ON position.
- Measure the voltage between windshield washer pump C137-1, circuit 941 (BK/WH), harness side and ground while depressing the multi-function switch to the wash position.
  
  Fig 1: Measuring Voltage Between Windshield Washer Pump C137-1 And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : GO to E2.

No : GO to E3.
E2 CHECK CIRCUIT 57 (BK) FOR GROUND
- Measure the resistance between the windshield washer pump C137-2, circuit 57 (BK), harness side and ground.
  
  Fig 2: Measuring Resistance Between Windshield Washer Pump C137-2 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : INSTALL a new windshield washer pump. REFER to WASHER PUMP AND RESERVOIR .

No : REPAIR the circuit. TEST the system for normal operation.
E3 CHECK CIRCUIT 941 (BK/WH) FOR AN 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 windshield washer pump C137-1, circuit 941 (BK/WH), harness side.
  
  Fig 3: Measuring Resistance Between Windshield Wiper Motor Pin C125-7 And Windshield Washer Pump C137-1
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to E4.

No : REPAIR the circuit. TEST the system for normal operation.
E4 CHECK THE MULTI-FUNCTION SWITCH
- Key in OFF position.
- Disconnect: Multi-function Switch C202b.
- Carry out the multi-function switch component test. Refer to COMPONENT TESTING .
- Does the multi-function switch pass the component test?
Yes : GO to E5.

No : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES .
E5 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Measure the resistance between multi-function switch C202b-5, circuit 57 (BK), harness side and ground.
  
  Fig 4: Measuring Resistance Between Multi-Function Switch C202B-5 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to E6.

No : REPAIR the circuit. TEST the system for normal operation.
E6 CHECK CIRCUIT 680 (LB/OG) FOR AN OPEN
- Measure the resistance between windshield wiper motor C125-12, circuit 680 (LB/OG), harness side and multi-function switch C202b-2, circuit 680 (LB/OG), harness side.
  
  Fig 5: Measuring Resistance Between Windshield Wiper Motor C125-12 And Multi-Function Switch C202B-2
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to E7.

No : REPAIR the circuit. TEST the system for normal operation.
E7 CHECK FOR CORRECT WIPER MOTOR OPERATION
- 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 : GO to E8.

No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.
E8 CHECK THE WINDSHIELD WIPER MOTOR
- Key in OFF position.
- Disconnect: Windshield Wiper Motor C125.
- Carry out the windshield wiper motor component test as outlined.
- Does the windshield wiper motor pass the component test?
Yes : The system is operating correctly at this time. The concern may have been caused by binding or incorrect pivot arm adjustment. REFER to WIPER BLADE AND PIVOT ARM ADJUSTMENT . TEST the system for normal operation.

No : INSTALL a new windshield wiper motor. REFER to WIPER MOTOR .