Pinpoint Test A: The Wipers Are Inoperative

NOTE: Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

A1 CHECK WIPER MOTOR GROUND
- Ignition OFF.
- Disconnect: Wiper Motor C125.
- Measure the resistance between front wiper motor C125-4, circuit GD121 (BK/YE), harness side and ground.
  
  Fig 1: Measuring Resistance Between Front Wiper Motor C125-4, Circuit GD121 (BK/YE) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  - Yes: GO to A2.
  - No: REPAIR the circuit. TEST the system for normal operation.
A2 CHECK WIPER MOTOR FOR VOLTAGE
- Ignition ON.
- With the multifunction switch in the low position, measure the voltage between wiper motor C125-5, circuit CRW16 (GY/BN), harness side and ground.
  
  Fig 2: Measuring Voltage Between Wiper Motor C125-5, Circuit CRW16 (GY/BN) And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
  - Yes: INSTALL a new wiper motor. REFER to Wiper Motor . TEST the system for normal operation.
  - No: GO to A3.
A3 CHECK WIPER MOTOR HIGH/LOW CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: Wiper/Washer Module C2157.
- Measure the resistance between wiper/washer module C2157-4, circuit CRW16 (GY/BN), harness side and wiper motor C125-5, circuit CRW16 (GY/BN), harness side; and between wiper/washer module C2157-11, circuit CRW15 (BN/WH), harness side and wiper motor C125-3, circuit CRW15 (BN/WH), harness side.
  
  Fig 3: Checking Wiper Motor High/Low Circuits For Open
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
  - Yes: GO to A4.
  - No: REPAIR the circuit(s). TEST the system for normal operation
A4 CHECK WIPER/WASHER MODULE FOR VOLTAGE
- Ignition ON.
- Measure the voltage between wiper/washer module C2157-9, circuit SBB09 (RD), harness side and ground; and between wiper/washer module C2157-10, circuit CBP45 (YE), harness side and ground.
  
  Fig 4: Checking Wiper/Washer Module For Voltage
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
  - Yes: GO to A5.
  - No: VERIFY Battery Junction Box (BJB) fuse 9 (20A) and Smart Junction Box (SJB) fuse 45 (5A) are OK. If OK, REPAIR the circuit. TEST the system for normal operation.
    If not OK, REFER to the Wiring Diagrams information to identify possible causes of the circuit short. REPAIR the circuit. TEST the system for normal operation.
A5 CHECK WIPER/WASHER MODULE FOR GROUND
- Ignition OFF.
- Measure the resistance between wiper/washer module C2157-12, circuit GD121 (BK/YE), harness side and ground.
  
  Fig 5: Measuring Resistance Between Wiper/Washer Module C2157-12, Circuit GD121 (BK/YE) And Ground
  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.
A6 CHECK THE MULTIFUNCTION SWITCH
- Disconnect: Multifunction Switch C202.
- 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 A7.
  - No: INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES .
A7 CHECK MULTIFUNCTION SWITCH FOR GROUND
- Measure the resistance between multifunction switch C202-15, circuit GD116 (BK/VT), harness side and ground.
  
  Fig 6: Measuring Resistance Between Multifunction Switch C202-15, Circuit GD116 (BK/VT) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  - Yes: GO to A8.
  - No: REPAIR the circuit. TEST the system for normal operation.
A8 CHECK THE WIPER/WASHER MODULE FOR PROPER OPERATION
- Check for:
  - corrosion.
  - pushed-out pins.
- Connect the wiper/washer module connector and make sure it is seated correctly, and reconnect the related wiper components.
- Operate the system and verify the concern is still present.
- Is the concern still present?
  - Yes: INSTALL a new wiper/washer module. REFER to Wiper/Washer Module .
  - 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.