Pinpoint Test A: The Wipers Are Inoperative - Front

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

A1 CHECK MULTI-FUNCTION SWITCH CIRCUIT 950 (WH/BK) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Multi-function Switch C2081.
- Key in ON position.
- Measure the voltage between multi-function switch C2081-3, circuit 950 (WH/BK), harness side and ground.
  
  Fig 1: Checking Multi-Function Switch Circuit 950 (WH/BK) For Voltage
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : GO to A3.

No : VERIFY the smart junction box (SJB) fuse 25 (20A) is OK. If OK, GO to A2.
A2 CHECK CIRCUIT 950 (WH/BK) FOR AN OPEN
- Key in OFF position.
- Disconnect: SJB C2280b.
- Measure the resistance between multi-function switch C2081-3, circuit 950 (WH/BK), harness side and SJB C2280b-20, circuit 950 (WH/BK), harness side.
  
  Fig 2: Checking Circuit 950 (WH/BK) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to A6.

No : REPAIR the circuit. TEST the system for normal operation.
A3 CHECK MULTI-FUNCTION SWITCH CIRCUIT 57 (BK) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between multi-function switch C2081-5, circuit 57 (BK), harness side and ground.
  
  Fig 3: Checking Multi-Function Switch Circuit 57 (BK) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to A4.

No : REPAIR the circuit. TEST the system for normal operation.
A4 CHECK THE MULTI-FUNCTION SWITCH
- Carry out the multi-function switch component test. Refer to COMPONENT TESTING article.
- Did the multi-function switch pass the component test?
Yes : GO to A5.

No : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.
A5 CHECK THE WINDSHIELD WIPER MOTOR CIRCUIT 57 (BK) FOR AN OPEN
- Disconnect: Windshield Wiper Motor C125.
- Measure the resistance between windshield wiper motor C125-3, circuit 57 (BK), harness side and ground.
  
  Fig 4: Checking Windshield Wiper Motor Circuit 57 (BK) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : INSTALL a new windshield wiper motor. REFER to WIPER MOTOR - WINDSHIELD in this article.

No : REPAIR the circuit. TEST the system for normal operation.
A6 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - corrosion.
  - pushed-out pins.
- Connect all the SJB 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 SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.

No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.