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Pinpoint Test A: The Windshield Wipers Are Inoperative: Testing

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
  1. A1 CHECK CIRCUIT 1671 (RD) FOR VOLTAGE 
    • Disconnect: Wiper Motor C125.
    • Key in ON position.
    • Measure the voltage between windshield wiper C125-5, circuit 1671 (RD), harness side and ground; and between windshield wiper motor C125-8, circuit 1671 (RD), harness side and ground.
      Fig 1: Measuring Voltage Between Windshield Wiper Connector And Ground
      G03917139Courtesy of FORD MOTOR CO.
    • Are the voltages greater than 10 volts? 
    • Yes  : GO to  A10.
    • No  : GO to A2.
  2. A2 CHECK CIRCUIT 1671 (RD) FOR AN OPEN 
    • Disconnect: Windshield Wiper Fuse 37.
    • Key in OFF position.
    • Measure the resistance between windshield wiper motor C125-5, circuit 1671 (RD), harness side, and battery junction box BJB windshield wiper fuse cavity 37, circuit 1671 (RD), harness side; and between windshield wiper motor C125-8, circuit 1671 (RD), harness side, and battery junction box BJB fuse cavity 37, circuit 1671 (RD), harness side.
      Fig 2: Checking Circuit 1671 (RD) For An Open
      G03989282Courtesy of FORD MOTOR CO.
    • Are both resistances less than 5 ohms? 
    • Yes  : GO to A3.
    • No  : REPAIR the circuit. TEST the system for normal operation.
  3. A3 CHECK THE WIPER HIGH CURRENT RELAY 
    • Disconnect: Wiper High Current Relay.
    • Carry out the wiper high current relay component test. Refer to COMPONENT TESTING .
    • Did the wiper high current relay pass the component test? 
    • Yes  : GO to A4.
    • No  : INSTALL a new wiper high current relay. TEST the system for normal operation.
  4. A4 CHECK CIRCUIT 698 (RD) FOR VOLTAGE 
    • Measure the voltage between wiper high current relay pin 3, circuit 698 (RD), harness side and ground.
      Fig 3: Measuring Voltage Between Wiper High Current Relay Pin 3, Circuit 698 (RD), Harness Side And Ground
      G03989283Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : GO to A5.
    • No  : CHECK BJB wiper high current relay pin 3 for looseness, corrosion, dirt or damage. REPAIR the circuit or install a new BJB as necessary. TEST the system for normal operation.
  5. A5 CHECK BJB CIRCUIT 1672 (DB) FOR AN OPEN 
    • Connect a fused jumper wire between BJB wiper high current relay pin 3, circuit 698 (RD), harness side, and BJB wiper high speed relay pin 4, circuit 1672 (DB), harness side.
      Fig 4: Connecting Fused Jumper Wire Between BJB Wiper High Current Relay Pin 3, Circuit 698 (RD), Harness Side, And BJB Wiper High Speed Relay Pin 4, Circuit 1672 (DB)
      G03989284Courtesy of FORD MOTOR CO.
    • Key in ON position.
    • Measure the voltage between BJB wiper fuse C37, circuit 1672 (DB) and ground.
      Fig 5: Measuring Voltage Between BJB Wiper Fuse C37, Circuit 1672 (DB) And Ground
      G03989285Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : GO to A6.
    • No  : CHECK BJB wiper high current relay pin 4, circuit 1672 (DB) and wiper fuse 37 cavity, circuit 1672 (DB) for looseness, corrosion, dirt or damage. REPAIR the open circuit or install a new BJB as necessary. TEST the system for normal operation.
  6. A6 CHECK WIPER HIGH CURRENT RELAY CIRCUIT 1205 (BK) FOR GROUND 
    • Measure the resistance between BJB wiper high current relay pin 2, circuit 1205 (BK) and ground.
      Fig 6: Measuring Resistance Between BJB Wiper High Current Relay Pin 2, Circuit 1205 (BK) And Ground
      G03989286Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to A7.
    • No  : CHECK BJB wiper high current relay pin 2 for looseness, corrosion, dirt or damage. REPAIR the open circuit or install a new BJB as necessary. TEST the system for normal operation.
  7. A7 CHECK CIRCUIT 296 (WH/PK) FOR VOLTAGE 
    • Key in ON position.
    • Measure the voltage between BJB wiper high current relay pin 1, circuit 296 (WH/PK), harness side and ground.
      Fig 7: Measuring Voltage Between BJB Wiper High Current Relay Pin 1, Circuit 296 (WH/PK), Harness Side And Ground
      G03989287Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : The system is operating normally at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.
    • No  : GO to A8.
  8. A8 CHECK CIRCUIT 296 (WH/PK) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: SJB C2280a.
    • Measure the resistance between BJB wiper high current relay pin 1, circuit 296 (WH/PK), harness side and SJB C2280a-10, circuit 296 (WH/PK), harness side.
      Fig 8: Measuring Resistance Between BJB Wiper High Current Relay Pin 1, Circuit 296 (WH/PK), Harness Side And SJB C2280A-10, Circuit 296 (WH/PK)
      G03989288Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to A9.
    • No  : REPAIR the circuit or install a new BJB as necessary. TEST the system for normal operation.
  9. A9 CHECK CIRCUIT 1716 (GY/YE) FOR VOLTAGE 
    • Key in ON position.
    • Measure the voltage between SJB C2280b-4, circuit 1716 (GY/YE), harness side and ground.
      Fig 9: Measuring Voltage Between SJB C2280B-4, Circuit 1716 (GY/YE), Harness Side And Ground
      G03989289Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
  10. A10 CHECK CIRCUITS 1205 (BK) AND 1203 (BK/LB) FOR OPENS 
    • Key in OFF position.
    • Measure the resistance between windshield wiper C125-6, circuit 1205 (BK), harness side and ground; and between windshield wiper motor C125-G, circuit 1203 (BK/LB), harness side and ground.
      Fig 10: Measuring Resistance Between Connector Terminals And Ground
      G03880805Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    • Yes  : GO to A11.
    • No  : REPAIR the circuit(s). TEST the system for normal operation
  11. A11 CHECK THE WIPER SWITCH 
    • Disconnect: Wiper Switch C202a.

      Carry out the wiper switch component test. Refer to COMPONENT TESTING .

    • Did the wiper switch pass the component test? 
  12. A12 CHECK WIPER SWITCH CIRCUIT 1205 (BK) FOR OPEN 
    • Measure the resistance between wiper switch C202a-2, circuit 1205 (BK), harness side and ground.
      Fig 11: Measuring Resistance Between Wiper Switch C202A-2, Circuit 1205 (BK), Harness Side And Ground
      G03989291Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to A13.
    • No  : REPAIR the circuit. TEST the system for normal operation.
  13. A13 CHECK CIRCUITS 61 (YE/RD), 63 (RD), 950 (WH/BK), AND 58 (WH) FOR OPENS 
    • Using the following table, measure the resistance between wiper switch C202a harness side and windshield wiper motor harness side:
      WIPER SWITCH C202A - WINDSHIELD WIPER MOTOR C125 REFERENCE

      Wiper Switch C202a Windshield Wiper Motor C125
      C202a-12, circuit 61 (YE/RD) C125-10, circuit 61 (YE/RD)
      C202a-1, circuit 63 (RD) C125-11, circuit 63 (RD)
      C202a-5, circuit 950 (WH/BK) C125-12, circuit 950 (WH/BK)
      C202a-4, circuit 58 (WH) C125-1, circuit 58 (WH)
      Fig 12: Measuring Resistance Between Wiper Switch C202A Harness Side And Windshield Wiper Motor Harness Side
      G03989311Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    • Yes  : GO to A14.
    • No  : REPAIR the circuit(s). TEST the system for normal operation.
  14. A14 CHECK FOR CORRECT WIPER MOTOR OPERATION 
    • Disconnect the windshield wiper motor connector.
    • Check for:
      • corrosion
      • pushed-out pins
    • Connect the windshield wiper motor connectors and make sure they are seated correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes  : INSTALL a new windshield wiper motor. REFER to WINDSHIELD WIPER MOTOR . TEST the system for normal operation.
    • 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.
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