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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1345 (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 Sable, 2008 Ford Taurus X, and 2008 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If DTC B2077 is present, refer to INTERIOR LIGHTING article to diagnose the liftgate ajar switch concern before attempting to diagnose the inoperative rear window wiper system.
  1. B1 CHECK CIRCUIT CRW02 (GY/BU) 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 CRW02 (GY/BU), harness side and ground.
      • Fig 1: Measuring Voltage
      GF0045499Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  B6.
    2. NO  : Go to  B2.
  2. B2 CHECK THE REAR WIPER RELAY 
    • Key in OFF position.
    • Disconnect: Rear Wiper Relay
    • Carry out the Rear Wiper Relay Component Test. Refer to appropriate COMPONENT TESTING article.
    • Did the rear wiper relay pass the component test? 
    1. YES  : Go to  B3.
    2. NO  : INSTALL a new front wiper relay. TEST the system for normal operation.
  3. B3 CHECK CIRCUIT CBP45 (YE) FOR VOLTAGE 
    • Key in ON position.
    • Measure the voltage between rear wiper relay pin 1, circuit CBP45 (YE), harness side and ground.
      • Fig 2: Measuring Voltage
      GF0045500Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  B4.
    2. NO  : VERIFY smart junction box (SJB) fuse 45 (5A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
  4. B4 CHECK CIRCUIT SBB25 (RD) FOR VOLTAGE 
    • Measure the voltage between rear wiper relay pin 3, circuit SBB25 (RD), harness side and ground.
      • Fig 3: Measuring Voltage
      GF0045501Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  B5.
    2. NO  : VERIFY battery junction box (BJB) fuse 25 (25A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
  5. B5 CHECK REAR WIPER RELAY CIRCUIT GD120 (BK/GN) FOR GROUND 
    • Key in OFF position.
    • Measure the resistance between BJB rear wiper relay pin 2, circuit GD120 (BK/GN), and ground.
      • Fig 4: Measuring Resistance
      GF0045502Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : REPAIR open in circuit CRW02 (GY/BU). TEST the system for normal operation.
    2. NO  : REPAIR open in circuit GD120 (BK/GN). TEST the system for normal operation.
  6. B6 CHECK CIRCUIT GD147 (BK/VT) FOR AN OPEN 
    • Key in OFF position.
    • Measure the resistance between rear window wiper motor C476-1, circuit GD147 (BK/VT), harness side and ground.
      • Fig 5: Measuring Resistance
      GF0045503Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  B7.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  7. B7 CHECK THE MULTI-FUNCTION SWITCH 
    • 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  B8.
    2. NO  : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES article.
  8. B8 CHECK CIRCUIT GD111 (BK/BU) FOR AN OPEN 
    • Measure the resistance between multi-function switch C202-15, circuit GD111 (BK/BU), harness side and ground.
      • Fig 6: 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  B9.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  9. B9 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 motor C476-2, circuit CRW21 (YE/VT), harness side.
      • Fig 7: Measuring Resistance
      GF0045504Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  B10.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  10. B10 CHECK THE SJB LIFTGATE AJAR STATUS INPUT 
    • Key in ON position.
    • Close the liftgate.
    • With the liftgate fully closed, measure the voltage between rear window wiper motor C476-4, circuit CRW02 (GY/BU), harness side and rear window wiper motor C476-3, circuit CPL58 (GY/OG), harness side.
      • Fig 8: Measuring Voltage
      GF0045505Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  B12.
    2. NO  : Go to  B11.
  11. B11 CHECK CIRCUIT CPL58 (GY/OG) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Smart Junction Box (SJB) C2280c
    • Measure the resistance between rear window wiper motor C476-3, circuit CPL58 (GY/OG), harness side and SJB C2280c-16, circuit CPL58 (GY/OG), harness side.
      • Fig 9: Measuring Resistance
      GF0045506Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : REFER to INTERIOR LIGHTING article to diagnose the liftgate ajar switch concern.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  12. B12 CHECK FOR CORRECT WIPER MOTOR OPERATION 
    • Disconnect all wiper motor connectors.
    • Check for:
      • liftgate 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  : INSTALL a new rear window wiper motor. REFER to Wiper Motor - Rear Window .
    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.
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