Pinpoint Test U: The Wash And Wipe Function Are Inoperative

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

U1 CHECK THE MULTIFUNCTION SWITCH
- Key in OFF position.
- Disconnect: Multifunction Switch C202.
- Carry out the multifunction switch component test.
  Refer to COMPONENT TESTING .
- Did the multifunction switch pass the component test?
1. Yes : GO to U2.
2. No : INSTALL a new multifunction switch. REFER to STEERING SYSTEM for the removal and installation procedure.
U2 CHECK CIRCUIT 31-KA19 (BK/RD) FOR AN OPEN
- Measure the resistance between the multifunction switch C202-2, circuit 31-KA19 (BK/RD), harness side and ground.
  
  Fig 1: Measuring Resistance Between Multifunction Switch C202-2, Circuit 31-KA19 (BK/RD)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
1. Yes : GO to U3.
2. No : REPAIR the circuit. TEST the system for normal operation.
U3 CHECK CIRCUIT 8-KA7 (WH/VT) FOR AN OPEN
- Disconnect: Windshield Wiper Motor C125.
- Measure the resistance between the multifunction switch C202-5, circuit 8-KA7 (WH/VT), harness side and the windshield wiper motor C125-12, circuit 8-KA7 (WH/VT), harness side.
  
  Fig 2: Measuring Resistance Between Multifunction Switch C202-5, Circuit 8-KA7 (WH/VT)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
1. Yes : Go To PINPOINT TEST V: THE WASHER PUMP IS INOPERATIVE to diagnose the washer pump.
2. No : REPAIR the circuit. TEST the system for normal operation.