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Pinpoint Test B: The Wipers Are Inoperative - Rear Window

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
  1. B1 CHECK CIRCUITS SBB19 (BU/RD) AND CBP43 (GY) FOR VOLTAGE 
    • Key in OFF position.
    • Disconnect: Rear Window Wiper Motor C4218
    • Key in ON position.
      • Fig 1: Measuring Voltage Between Rear Window Wiper Motor C4218-6 & C4218-8, SBP19 (BU/RD) & CBP43 (GY)
      GF0031046Courtesy of FORD MOTOR CO.
    • Measure the voltage between rear window wiper motor C4218-6, circuit SBP19 (BU/RD), harness side and ground; and between rear window wiper motor C4218-8, circuit CBP43 (GY), harness side and ground.
    • Are the voltages greater than 10 volts? 
    1. YES  : Go to  B2.
    2. NO  : VERIFY SJB fuses 19 (25A) and 43 (10A) are OK. If OK, REPAIR the circuit(s) in question. TEST the system for normal operation.
  2. B2 CHECK CIRCUIT GD149 (BK/GY) FOR AN OPEN 
    • Key in OFF position.
      • Fig 2: Measuring Resistance Between Rear Window Wiper C4218-5, Circuit GD149 (BK/GY) & Ground
      GF0031047Courtesy of FORD MOTOR CO.
    • Measure the resistance between rear window wiper C4218-5, circuit GD149 (BK/GY), harness side and ground.
    • 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.
    • 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 .
  4. B4 CHECK CIRCUIT GD116 (BK/VT) FOR AN OPEN 
      Fig 3: Measuring Resistance Between Multi-Function Switch C202-15, Circuit GD116 (BK/VT) & Ground
      GF0026528Courtesy of FORD MOTOR CO.
    • Measure the resistance between multi-function switch C202-15, circuit GD116 (BK/VT), harness side and ground.
    • 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 FOR CORRECT WIPER MOTOR OPERATION 
    • Disconnect all wiper motor connectors.
    • Check for:
      • 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  B6.
    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.
  6. B6 CHECK THE REAR WINDOW WIPER MOTOR 
    • Carry out the rear window wiper motor component test as outlined.
    • 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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