Pinpoint Test A: The Wipers Are 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.

A1 CHECK CIRCUITS 65 (DG) AND 2025 (RD/YE) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Windshield Wiper Motor C125.
- Key in ON position.
- Measure the voltage between windshield wiper motor C125-5, circuit 2025 (RD/YE), harness side and ground; and between windshield wiper motor J125-8, circuit 65 (DG), harness side and ground.
  
  Fig 1: Checking Circuits 65 (DG) And 2025 (RD/YE) For Voltage
  Courtesy of FORD MOTOR CO.
- Are the voltages greater than 10 volts?
Yes : GO to A2.

No : VERIFY the BJB fuse 110 (30A) and the CJB fuse 13 (10A) are OK. If OK, REPAIR the circuit. TEST the system for normal operation.
A2 CHECK CIRCUITS 57 (BK) AND 676 (PK/OG) FOR OPENS
- Key in OFF position.
- Measure the resistance between windshield wiper motor C125-6, circuit 57 (BK), harness side and ground; and between windshield wiper motor C125-3, circuit 676 (PK/OG), harness side and ground.
  
  Fig 2: Checking Circuits 57 (BK) And 676 (PK/OG) For Opens
  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 MULTI-FUNCTION SWITCH
- 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 A4.

No : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES .
A4 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Measure the resistance between multi-function switch C202b-5, circuit 57 (BK), harness side and ground.
  
  Fig 3: Checking Circuit 57 (BK) For An Open
  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 multi-function switch C202b harness side and the windshield wiper motor C125 harness side:

MULTI-FUNCTION SWITCH & WINDSHIELD WIPER MOTOR CONNECTOR & CIRCUIT REFERENCE

Multi-function Switch C202b	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)

Fig 4: Measuring Resistance Between Multi-Function Switch C202B Harness Side And Windshield Wiper Motor C125

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?

Yes : GO to A6.

No : REPAIR the circuit. 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. The 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.
- 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 .