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Pinpoint Test H : The Left Or Right Power Window Is Inoperative - Rear Vent Window

WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
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. H1 CHECK THE VENT WINDOW OPERATION

    • Ignition ON.
    • Attempt to operate the vent windows while observing both LR and RR vent window operation.

    Are both the LH and RH vent windows inoperative? 

    Yes  GO to  H2.
    No  GO to  H8.

  2. H2 CHECK FOR GROUND INPUT TO THE VENT WINDOW OPEN AND CLOSE RELAYS

    • Ignition OFF.
    • Disconnect: Quarter Window Open Relay and Quarter Window Close Relay.
    • While holding the quarter window control switch in the close position, measure the resistance between quarter window close relay pin 1, circuit CPW25 (YE/BU), harness side and ground.
    1. GFD137673Courtesy of FORD MOTOR COMPANY
    • While holding the quarter window control switch in the open position, measure the resistance between quarter window open relay pin 2, circuit CPW26 (BU/BN), harness side and ground.
    1. GFD137674Courtesy of FORD MOTOR COMPANY

    Are the resistances less than 3 ohms? 

    Yes  GO to  H5.
    No  GO to  H3.

  3. H3 CHECK FOR GROUND AT THE VENT WINDOW SWITCH

    • Disconnect: Overhead Console Switch C930.
    • Measure the resistance between quarter window control switch C930-12 , circuit GD138 (BK/WH), harness side and ground.
    1. GFD137675Courtesy of FORD MOTOR COMPANY

    Is the resistance less than 3 ohms? 

    Yes  GO to  H4.
    No  REPAIR the circuit. TEST the system for normal operation.

  4. H4 CHECK CIRCUITS CPW25 (YE/BU) AND CPW26 (BU/BN) FOR AN OPEN

    • Measure the resistance between power vent window close relay pin 1, circuit CPW25 (YE/BU), harness side and power vent window switch C930-9 , circuit CPW25 (YE/BU), harness side.
    1. GFD137676Courtesy of FORD MOTOR COMPANY
    • Measure the resistance between power vent window open relay pin 2, circuit CPW26 (BU/BN), harness side and power vent window switch C930-4 , circuit CPW26 (BU/BN), harness side.
    1. GFD137677Courtesy of FORD MOTOR COMPANY

    Are the resistances less than 3 ohms? 

    Yes  INSTALL a new vent power window switch. REFER to Instrument Panel and Console . TEST the system for normal operation.
    No  REPAIR the affected circuit. TEST the system for normal operation.

  5. H5 CHECK THE POWER VENT WINDOW OPEN AND CLOSE RELAY

    • Carry out the relay component test on the power vent window open and close relays.Refer to Component Testing for component testing.

    Did the power vent window open and close relay pass the component test? 

    Yes  GO to  H6.
    No  INSTALL a new relay. TEST the system for normal operation.

  6. H6 CHECK FOR POWER TO THE VENT WINDOW OPEN AND CLOSE RELAYS

    • Ignition ON.
    • Measure the voltage between quarter window open relay, harness side and ground.
      • Pin 1, circuit CBP41 (BU)
      • Pin 5, circuit CBP41 (BU)
    • Measure the voltage between quarter window close relay, harness side and ground.
      • Pin 2, circuit CBP41 (BU)
      • Pin 5, circuit CBP41 (BU)
    1. GFD137678Courtesy of FORD MOTOR COMPANY

    Are the voltages greater than 11 volts? 

    Yes  GO to  H7.
    No  REPAIR the affected circuit. TEST the system for normal operation.

  7. H7 CHECK CIRCUIT GD151 (BK/GN) FOR AN OPEN

    • Ignition OFF.
    • Measure the resistance between quarter window open relay and close relay, harness side and ground.
      • Pin 4, circuit GD151 (BK/GN)
    1. GFD137679Courtesy of FORD MOTOR COMPANY

    Are the resistances less than 3 ohms? 

    Yes  GO to  H8.
    No  REPAIR the affected circuit. TEST the system for normal operation.

  8. H8 CHECK THE MOTOR CIRCUITS

    • Ignition OFF.
    • Disconnect: Power Vent Window Motor C4047 (LH) or C4090 (RH).
    • Measure the resistance between power vent window open relay pin 3, circuit CPW27 (GN), harness side and inoperative power vent window motor:
      • (RH) C4090-1 , circuit CPW27 (GN).
      • (LH) C4047-2 , circuit CPW27 (GN).
    1. GFD137680Courtesy of FORD MOTOR COMPANY
    • Measure the resistance between power vent window close relay pin 3, circuit CPW28 (WH/BN), harness side and power vent window motor:
      • (RH) C4090-2 , circuit CPW28 (WH/BN).
      • (LH) C4047-1 , circuit CPW28 (WH/BN).
    1. GFD137681Courtesy of FORD MOTOR COMPANY

    Are the resistances less than 3 ohms? 

    Yes  INSTALL a new power vent window regulator motor. REFER to Window Regulator Motor - Rear Quarter . TEST the system for normal operation.
    No  REPAIR the affected circuit. TEST the system for normal operation.
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