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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1087 (Wiper System And Washer System) >> Diagnostic Tests >> Wipers and Washers >> Pinpoint Tests >> Pinpoint Test I: The Wash and Wipe Functions are Inoperative - Rear >> Pinpoint Test I: The Wash And Wipe Functions Are Inoperative - Rear

Pinpoint Test I: The Wash And Wipe Functions Are Inoperative - Rear

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. I1 CHECK THE MULTI-FUNCTION SWITCH 
    • Key in OFF position.
    • Disconnect: Multi-function Switch C2081
    • Carry out the multi-function switch component test. Refer to COMPONENT TESTING article.
    • Did the multi-function switch pass the component test? 
    1. YES  : Go to  I2.
    2. NO  : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES article. TEST the system for normal operation.
  2. I2 CHECK THE REAR WIPER OPERATION 
    • Connect: Multi-function Switch C2081
    • Key in ON position.
    • Operate the rear washer pump.
    • Does the rear wiper operate? 
    1. YES  : Go to  I3.
    2. NO  : Go to  I6.
  3. I3 CHECK CIRCUIT 406 (BN/WH) FOR VOLTAGE 
    • Key in OFF position.
    • Disconnect: Rear Washer Pump C1097
    • Key in ON position.
      • Fig 1: Checking Circuit For Voltage
      GF0023860Courtesy of FORD MOTOR CO.
    • Measure the voltage between rear washer pump C1097-1, circuit 406 (BN/WH), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  I5.
    2. NO  : Go to  I4.
  4. I4 CHECK CIRCUIT 406 (BN/WH) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: SJB C2280d
      • Fig 2: Checking Circuit For Open
      GF0023862Courtesy of FORD MOTOR CO.
    • Measure the resistance between rear washer pump C1097-1, circuit 406 (BN/WH), harness side and SJB C2280d-30, circuit 406 (BN/WH), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I7.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. I5 CHECK CIRCUIT 488 (DG) FOR AN OPEN 
    • Key in OFF position.
      • Fig 3: Checking Circuit For Open
      GF0023861Courtesy of FORD MOTOR CO.
    • While activating the front washer pump using the multi-function switch, measure the resistance between rear washer pump C1097-2, circuit 488 (DG), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new rear window washer pump. REFER to Washer Pump - Rear Window . TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  6. I6 CHECK THE REAR WASHER SIGNAL CIRCUIT TO THE SJB ON CIRCUIT 488 (DG) 
    • Key in OFF position.
    • Disconnect: SJB C2280e
    • Disconnect: Multi-function Switch C2081
      • Fig 4: Checking Circuit For Open
      GF0023863Courtesy of FORD MOTOR CO.
    • Measure the resistance between SJB C2280e-10, circuit 488 (DG), harness side and multi-function switch C2081-11, circuit 488 (DG), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I7.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  7. I7 CHECK FOR CORRECT SJB OPERATION 
    • Disconnect all the SJB connectors.
    • Check for:
      • corrosion.
      • pushed-out pins.
    • Connect all the SJB connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. REPEAT the SJB self-test.

      TEST the system for normal operation.

    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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