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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1166 (Wiper System And Washer System) >> Diagnostic Tests >> Wipers and Washers >> Pinpoint Tests >> Pinpoint Test B: The Wipers are Inoperative - Rear Window >> Pinpoint Test B: The Wipers Are Inoperative - Rear Window

Pinpoint Test B: The Wipers Are Inoperative - Rear Window

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. B1 CHECK CIRCUITS SBP19 (BU/RD) AND CBP43 (GY) FOR VOLTAGE 
    • Key in OFF position.
    • Disconnect: Rear Window Wiper Motor C476
    • Key in ON position.
    • Measure the voltage between rear window wiper motor C476-4, circuit SBP19 (BU/RD), harness side and ground; and between rear window wiper motor C476-8, circuit CBP43 (GY), harness side and ground.
      • Fig 1: Measuring Voltage
      GF0041884Courtesy of FORD MOTOR CO.
    • Are the voltages greater than 10 volts? 
    1. YES  : Go to  B2.
    2. NO  : VERIFY smart junction box (SJB) fuse 19 (25A) and SJB fuse 43 (10A) are OK. If OK, REPAIR the circuit(s) in question. TEST the system for normal operation.
  2. B2 CHECK CIRCUIT GD183 (BK/WH) FOR AN OPEN 
    • Key in OFF position.
    • Measure the resistance between rear window wiper C476-1, circuit GD183 (BK/WH), harness side and ground.
      • Fig 2: Measuring Resistance
      GF0041885Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  B3.
    2. NO  : REPAIR the circuit(s) in question. TEST the system for normal operation.
  3. B3 CHECK THE MULTI-FUNCTION SWITCH 
    • Key in OFF position.
    • Disconnect: Multi-Function Switch C202
    • Carry out the Multi-Function Switch Component Test. Refer to appropriate COMPONENT TESTING article.
    • Did the multi-function switch pass the component test? 
    1. YES  : Go to  B4.
    2. NO  : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES article.
  4. B4 CHECK CIRCUIT GD114 (BK/BU) FOR AN OPEN 
    • Measure the resistance between multi-function switch C202-15, circuit GD114 (BK/BU), harness side and ground.
      • Fig 3: Measuring Resistance Between Multi-Function Switch C202-15, Circuit GD116 (BK/VT) & Ground
      GF0026528Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  B5.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. B5 CHECK CIRCUIT CRW21 (YE/VT) FOR AN OPEN 
    • Measure the resistance between multi-function switch C202-13, circuit CRW21 (YE/VT), harness side and rear window wiper C476-7, circuit CRW21 (YE/VT), harness side.
      • Fig 4: Measuring Resistance
      GF0041886Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  B6
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  6. B6 CHECK FOR CORRECT WIPER MOTOR OPERATION 
    • Disconnect all wiper motor connectors.
    • Check for:
      • liftgate glass open.
      • corrosion.
      • pushed-out pins.
    • Connect all wiper motor connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : Go to  B7.
    2. 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.
  7. B7 CHECK THE REAR WINDOW WIPER MOTOR 
    • Carry out the rear window wiper motor component test as outlined in this article.
    • Did the rear window wiper motor pass the component test? 
    1. YES  : The system is operating correctly at this time. Concern may have been caused by binding or incorrect pivot arm adjustment. TEST the system for normal operation.
    2. NO  : INSTALL a new rear window wiper motor. REFER to Wiper Motor - Rear Window .
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