Pinpoint Test A: The Wipers Are Inoperative

WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

A1 CHECK CIRCUITS 65 (DG) AND 950 (WH/BK) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Windshield Wiper Motor C125.
- Key in ON position.
- Measure the voltage between windshield wiper motor C125 pin 8, circuit 65 (DG), harness side and ground; and between windshield wiper motor C125 pin 5, circuit 950 (WH/BK), harness side and ground.
  
  Fig 1: Measuring Voltage Between Windshield Wiper Motor Pin 8 And Ground
  Courtesy of FORD MOTOR CO.
- Are the voltages greater than 10 volts?
- Yes : GO to A2.
- No : REPAIR the circuit(s) in question. TEST the system for normal operation.
A2 CHECK CIRCUITS 57 (BK) AND 938 (BK/LG) FOR OPENS
- Key in OFF position.
- Measure the resistance between windshield wiper motor C125 pin 6, circuit 57 (BK), harness side and ground; and between windshield wiper motor C125 pin 3, circuit 938 (BK/LG), harness side and ground.
  
  Fig 2: Measuring Resistance Between Windshield Wiper Motor Pin 6 And Ground
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : GO to A3.
- No : REPAIR the circuit(s) in question. TEST the system for normal operation.
A3 CHECK THE MULTIFUNCTION SWITCH
- Disconnect: Multifunction Switch C202c.
- Carry out the multifunction switch component test. Refer to COMPONENT TESTING for component testing.
- Did the multifunction switch pass the component test?
- Yes : GO to A4.
- No : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES .
A4 CHECK CIRCUIT 938 (BK/LG) FOR AN OPEN
- Measure the resistance between multifunction switch C202c pin 5, circuit 938 (BK/LG), harness side and ground.
  
  Fig 3: Measuring Resistance Between Multifunction Switch Pin 5 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to A5.
- No : REPAIR the circuit. TEST the system for normal operation.

A5 CHECK CIRCUITS 56 (DB/OG), 58 (WH), 61 (YE/RD) AND 63 (RD) FOR OPENS

Using the following table, measure the resistance between multifunction switch C202c harness side and windshield wiper motor C125 harness side:

Fig 4: Measuring Resistance Between Multifunction Switch Harness Side And Windshield Wiper Motor Harness Side

Courtesy of FORD MOTOR CO.

CIRCUIT REFERENCE

Multifunction Switch C202c	Windshield Wiper Motor C125
pin 6, circuit 56 (DB/OG)	pin 10, circuit 56 (DB/OG)
pin 3, circuit 58 (WH)	pin 11, circuit 58 (WH)
pin 1, circuit 61 (YE/RD)	pin 1, circuit 61 (YE/RD)
pin 4, circuit 63 (RD)	pin 9, circuit 63 (RD)

Is the resistance less than 5 ohms?

Yes : GO to A6.
No : REPAIR the circuit(s) in question. TEST the system for normal operation.

A6 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 A7.
- 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.
A7 CHECK THE WINDSHIELD WIPER MOTOR
- Key in OFF position.
- Disconnect: Windshield Wiper Motor C125.
- Carry out the windshield wiper motor component test as outlined in this article.
- Did the windshield wiper motor pass the component test?
- Yes : The system is operating correctly at this time. Concern may have been caused by binding or incorrect pivot arm adjustment. REFER to WINDSHIELD WIPER BLADE AND PIVOT ARM ADJUSTMENT . TEST the system for normal operation.
- No : INSTALL a new windshield wiper motor. REFER to WINDSHIELD WIPER MOTOR .