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Pinpoint Test A: All Windshield Wiper Modes Are Inoperative

  1. A1 CHECK THE WIPER RELAY 
    • Disconnect: Wiper Relay.
    • Substitute a known good relay and recheck the windshield wiper motor operation.
    • Do the wipers operate? 
    • Yes  : REMOVE the known good relay. INSTALL a new wiper relay.
    • No  : REMOVE the known good relay. GO to A2.
  2. A2 CHECK THE BATTERY SUPPLIED VOLTAGE CIRCUIT TO THE WIPER RELAY FOR AN OPEN 
    • Ignition OFF.
    • Measure the voltage  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      Wiper relay pin 3 SBB04 (GN/RD) - Ground
      Fig 1: Identifying Wiper Relay Pin Terminals
      G08040871Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 11 volts? 
    • Yes  : GO to A3.
    • No  : VERIFY the BJB fuse 4 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the SYSTEM WIRING DIAGRAMS to identify the possible causes of the circuit short.
  3. A3 CHECK THE IGNITION SUPPLIED VOLTAGE CIRCUIT TO THE WIPER RELAY FOR AN OPEN 
    • Ignition ON.
    • Measure the voltage  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      Wiper relay pin 1 CDC64 (WH/BU) - Ground
      Fig 2: Identifying Wiper Relay Pin Terminals
      G08040871Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 11 volts? 
    • Yes  : GO to A4.
    • No  : REPAIR the circuit.
  4. A4 CHECK THE WIPER RELAY COIL GROUND CIRCUIT FOR AN OPEN 
    • Measure the voltage  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      Wiper relay pin 1 CDC64 (WH/BU) Wiper relay pin 2 GD120 (BK/GN)
      Fig 3: Identifying Wiper Relay Pin Terminals
      G08040871Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 11 volts? 
    • Yes  : GO to A5.
    • No  : REPAIR the circuit.
  5. A5 CHECK THE WINDSHIELD WIPER MOTOR VOLTAGE SUPPLY CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Connect: Wiper Relay.
    • Disconnect: Windshield Wiper Motor C125.
    • Ignition ON.
    • Measure the voltage  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C125-8 CRW03 (VT/WH) - Ground
    • Is the voltage greater than 11 volts? 
    • Yes  : GO to A6.
    • No  : REPAIR the circuit.
      Fig 4: Identifying Windshield Wiper Motor C125 Connector Terminals
      G08725115Courtesy of FORD MOTOR CO.
  6. A6 CHECK THE WINDSHIELD WIPER MOTOR GROUND CIRCUIT FOR AN OPEN 
    • Measure the voltage  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C125-8 CRW03 (VT/WH) C125-6 GD120 (BK/GN)
      Fig 5: Identifying Windshield Wiper Motor C125 Connector Terminals
      G08725116Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 11 volts? 
    • Yes  : GO to A7.
    • No  : REPAIR the circuit.
  7. A7 CHECK THE FAIL-SAFE HIGH SPEED WIPER GROUND CIRCUIT CONTROL 
    • Ignition OFF.
    • Place the wiper/washer switch to the high speed setting.
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C125-1 CRW15 (BN/WH) - Ground
      Fig 6: Identifying Windshield Wiper Motor C125 Connector Terminals
      G08725117Courtesy of FORD MOTOR CO.
    • Is the resistance less than 3 ohms? 
  8. A8 CHECK THE FAIL-SAFE HIGH SPEED WIPER GROUND CIRCUIT FOR AN OPEN 
    NOTE: If steps A1-A7 did not identify the cause of the concern, a double fault is present. After the fail-safe ground is diagnosed and repaired, it is necessary check all operation modes and diagnose any symptom still present.
    • Disconnect: SCCM C2414A.
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C125-1 CRW15 (BN/WH) C2414A-13 CRW15 (BN/WH)
      Fig 7: Checking Fail-Safe High Speed Wiper Ground Circuit For Open
      G07965868Courtesy of FORD MOTOR CO.
    • Is the resistance less than 3 ohms? 
    • Yes  : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation. If the concern is still present, GO to A9.
    • No  : REPAIR the circuit.
  9. A9 CHECK FOR CORRECT SCCM OPERATION 
    • Disconnect and inspect all SCCM connectors.
    • Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    • Reconnect the SCCM connectors. Make sure they seat and latch correctly.
    • Operate the system and determine if the concern is still present.
    • Is the concern still present? 
    • Yes  : CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new SCCM. REFER to STEERING COLUMN SWITCHES .
    • No  : The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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