Pinpoint Test A: The Wipers Are Inoperative

WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

A1 CHECK CIRCUITS 950 (WH/BK) AND 1002 (BK/PK) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Windshield Wiper Motor C1348.
- Key in ON position.
- Measure the voltage between windshield wiper motor C1348-5, circuit 950 (WH/BK), harness side and ground; and between windshield wiper motor C1348-8, circuit 1002 (BK/PK), harness side and ground.
  
  Fig 1: Checking Circuits 950 (WH/BK) And 1002 (BK/PK) For Voltage
  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 1205 (BK) AND 1203 (BK/LB) FOR OPENS
- Key in OFF position.
- Measure the resistance between windshield wiper motor C1348-6, circuit 1205 (BK), harness side and ground; and between windshield wiper motor C1348-3, circuit 1203 (BK/LB), harness side and ground.
  
  Fig 2: Checking Circuits 1205 (BK) And 1203 (BK/LB) 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 STEERING COLUMN MULTIFUNCTION SWITCH
- Disconnect: Steering Column Multifunction Switch C202a.
- Carry out the steering column multifunction switch component test. Refer to COMPONENT TESTING .
- Did the steering column multifunction switch pass the component test?
- Yes : GO to A4.
- No : INSTALL a new steering column multifunction switch. REFER to STEERING COLUMN SWITCHES .
A4 CHECK CIRCUIT 1302 (WH/LG) FOR AN OPEN
- Measure the resistance between steering column multifunction switch C202a-4, circuit 1302 (WH/LG), harness side and ground.
  
  Fig 3: Checking Circuit 1302 (WH/LG) 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 682 (DB), 680 (LB/OG), 684 (PK/YE) AND 671 (LB) FOR

Using the following table, measure the resistance between steering column multifunction switch C202a harness side and windshield wiper motor C1348 harness side:

STEERING COLUMN MULTIFUNCTION SWITCH C202A REFERENCE

Steering Column Multifunction Switch C202a	Windshield Wiper Motor C1348
C202a-7, circuit 682 (DB)	C1348-10, circuit 682 (DB)
C202a-3, circuit 680 (LB/OG)	C1348-11, circuit 680 (LB/OG)
C202a-5, circuit 684 (PK/YE)	C1348-1, circuit 684 (PK/YE)
C202a-l, circuit 671 (LB)	C1348-9, circuit 671 (LB)

Fig 4: Measuring Resistance Between Steering Column Multifunction Switch C202a And Windshield Wiper Motor C1348

Courtesy of FORD MOTOR CO.

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 WINDSHIELD WIPER MOTOR OPERATION
- Disconnect all windshield wiper motor connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the windshield 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 C1348.
- 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. TEST the system for normal operation.
- No : INSTALL a new windshield wiper motor. REFER to WINDSHIELD WIPER MOTOR .