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Pinpoint Test I: The Washer Pump Is 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.
  1. I1 CHECK THE POWER SUPPLY TO THE WASHER PUMP 
    • Ignition OFF.
    • Disconnect: Washer Pump Motor C1397.
    • Ignition ON.
    • Measure the voltage between washer pump motor C1397-1, circuit 32-KA34 (WH/BK), harness side and ground; and between washer pump motor C1397-2, circuit 33-KA34 (YE/BK), harness side and ground.
      Fig 1: Measuring Voltage Between Washer Pump Motor C1397-1, Circuit 32-KA34 (WH/BK), Harness Side And Ground
      G06328587Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : GO to  I4.
    • No  : GO to I2.
  2. I2 CHECK THE POWER SUPPLY TO THE WIPER/WASHER SWITCH 
    • Ignition OFF.
    • Disconnect: Wiper/Washer Switch C2081.
    • Ignition ON.
    • Measure the voltage between wiper/washer switch C2081-10, circuit 15-KA19 (GN/OG), harness side and ground.
      Fig 2: Measuring Voltage Between Wiper/Washer Switch C2081-10, Circuit 15-KA19 (GN/OG), Harness Side And Ground
      G06328588Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : GO to I3.
    • No  : VERIFY the Central Junction Box (CJB) fuse 180 (20A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.

      If not OK, REFER to the Wiring Diagrams information to identify the possible causes of the circuit short. REPAIR the circuit. TEST the system for normal operation.

  3. I3 CHECK THE WIPER/WASHER SWITCH 
    • Yes  : REPAIR circuit 32-KA34 (WH/BK) or 33-KA34 (YE/BK) for an open. TEST the system for normal operation.
    • No  : INSTALL a new wiper/washer switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.
  4. I4 CHECK THE WIPER/WASHER SWITCH OPERATION 
    • Ignition OFF.
    • Verify the wiper/washer switch operation.
      • For an inoperative windshield washer pump, press and hold the wiper/washer switch in the windshield WASH position while measuring the resistance between washer pump motor C1397-2, circuit 33-KA34 (YE/BK), harness side and ground.
      • For an inoperative rear washer pump, press and hold the wiper/washer switch in the rear WASH position while measuring the resistance between washer pump motor C1397-1, circuit 32-KA34 (WH/BK), harness side and ground.
        Fig 3: Measuring Resistance Between Washer Pump Motor C1397-1, Circuit 32-KA34 (WH/BK), Harness Side And Ground
        G06328589Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms between the washer pump motor and ground when the wiper/washer switch is in the WASH position? 
    • Yes  : INSTALL a new washer pump motor. REFER to WASHER PUMP AND RESERVOIR  . TEST the system for normal operation.
    • No  : GO to I5.
  5. I5 CHECK CIRCUIT 31-KA19 (BK) FOR AN OPEN 
    • Disconnect: Wiper/Washer Switch C2081.
    • Measure the resistance between wiper/washer switch C2081-8, circuit 31-KA19 (BK), harness side and ground.
      Fig 4: Measuring Resistance Between Wiper/Washer Switch C2081-8, Circuit 31-KA19 (BK), Harness Side And Ground
      G06328590Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : INSTALL a new wiper/washer switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.
    • No  : REPAIR the circuit. TEST the system for normal operation.
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