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Pinpoint Test D: A Single Power Window Is Inoperative - LH Or RH Rear

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.
  1. D1 CHECK THE VOLTAGE TO THE LH REAR OR RH REAR WINDOW CONTROL SWITCH 
    • Disconnect: Inoperative Rear Window Control Switch C701 or C801
    • Key in ON position.
      • NOTE: Set the window lock switch to the UNLOCK position.
    • Measure the voltage between the inoperative rear window connector and ground:
      • for the RH rear window control switch, measure the voltage between RH rear window control switch C801-5, circuit CPW14 (VT/WH), harness side and ground.
      • for the LH rear window control switch, measure the voltage between C701-5, circuit CPW14 (VT/WH), harness side and ground.
      • Fig 1: Measuring Voltage
      GF0016487Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  D2.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  2. D2 CHECK THE GROUNDS TO THE INOPERATIVE REAR WINDOW CONTROL SWITCH 
    • Key in OFF position.
    • Measure the resistance between the inoperative window control switch and ground:
      • for the RH rear window control switch, measure the resistance between RH rear window control switch C801-1, circuit CPW18 (GY/VT), harness side and ground; and between RH rear window control switch C801-6, circuit CPW17 (BN/GN), harness side and ground.
      • for the LH rear window control switch, measure the resistance between LH rear window control switch C701-1, circuit CPW16 (BU//OG), harness side and ground; and between LH rear window control switch C701-6, circuit CPW15 (YE), harness side and ground.
      • Fig 2: Measuring Resistance
      GF0016492Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  D4.
    2. NO  : Go to  D3.
  3. D3 CHECK THE CIRCUITS TO THE INOPERATIVE REAR WINDOW CONTROL SWITCH FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: LH Front Window Control Switch C504a
    • For an inoperative LH rear power window, measure the resistance between LH front window control switch C504a harness side and LH rear window control switch C701 harness side using the following chart:
      LH Front Window Control Switch Circuit LH Rear Window Control Switch
      C504a-2 CPW15 (YE) C701-6
      C504a-4 CPW16 (BU/OG) C701-1
      • Fig 3: Measuring Resistance
      GF0045454Courtesy of FORD MOTOR CO.
    • For an inoperative RH rear power window, measure the resistance between LH front window control switch C504a harness side and RH window control switch C801 harness side using the following chart:
      LH Front Window Control Switch Circuit RH Rear Window Control Switch
      C504a-3 CPW17 (BN/GN) C801-6
      C504a-6 CPW18 (GY/VT) C801-1
      • Fig 4: Measuring Resistance
      GF0045455Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. YES  : INSTALL a new LH front window control switch. REFER to Window Control Switch . TEST the system for normal operation.
    2. NO  : REPAIR the circuit(s) for an open. TEST the system for normal operation.
  4. D4 CHECK THE INOPERATIVE WINDOW CONTROL SWITCH 
    • Connect: LH Front Window Control Switch C504a
    • Key in ON position.
    • For an inoperative LH rear window, connect a fused jumper wire between LH rear window control switch C701-1, circuit CPW16 (BU/OG), harness side and LH rear window control switch C701-4, circuit CPW22 (GN/VT), harness side; and between LH rear window control switch C701-3, circuit CPW21 (BN), harness side and LH rear window control switch C701-5, circuit CPW14 (VT/WH), harness side. The LH rear window should operate in the downward direction.
      • Fig 5: Connecting Jumper Wire
      GF0016495Courtesy of FORD MOTOR CO.
    • For an inoperative RH rear window, connect a fused jumper wire between RH rear window control switch C801-1, circuit CPW18 (GY/VT), harness side and RH rear window control switch C801-4, circuit CPW24 (WH/VT), harness side; and between RH rear window control switch C801-3, circuit CPW23 (GY), harness side and RH rear window control switch C801-5, circuit CPW14 (VT/WH), harness side. The RH rear window should operate in the downward direction.
      • Fig 6: Connecting Jumper Wire
      GF0016495Courtesy of FORD MOTOR CO.
    • For an inoperative LH rear window, connect a fused jumper wire between inoperative LH rear window control switch C701-3, circuit CPW21 (BN), harness side and LH rear window control switch C701-6, circuit CPW15 (YE), harness side; and between LH rear window control switch C701-4, circuit CPW22 (GN/VT), harness side and LH rear window control switch C701-5, circuit CPW14 (VT/WH), harness side. The LH rear window should operate in the upward direction.
      • Fig 7: Connecting Jumper Wire
      GF0016496Courtesy of FORD MOTOR CO.
    • For an inoperative RH rear window, connect a fused jumper wire between RH rear window control switch C801-3, circuit CPW23 (GY), harness side and RH rear window control switch C801-6, circuit CPW17 (BN/GN), harness side; and between RH rear window control switch C801-4, circuit CPW24 (WH/VT), harness side and RH rear window control switch C801-5, circuit CPW14 (VT/WH), harness side. The RH rear window should operate in the upward direction.
      • Fig 8: Connecting Jumper Wire
      GF0016496Courtesy of FORD MOTOR CO.
    • Did the inoperative window operate correctly? 
    1. YES  : INSTALL a new LH or RH rear window control switch. REFER to Window Control Switch . TEST the system for normal operation.
    2. NO  : Go to  D5.
  5. D5 CHECK THE POWER WINDOW MOTOR CIRCUITS 
    • Key in OFF position.
    • Disconnect: Inoperative Rear Window Motor C703 (LH) or C803 (RH)
    • For an inoperative LH rear window, measure the resistance between LH rear window control switch C701-3, circuit CPW21 (BN), harness side and LH rear window motor C703-1, circuit CPW21 (BN), harness side.
      • Fig 9: Measuring Resistance
      GF0016497Courtesy of FORD MOTOR CO.
    • For an inoperative RH rear window, measure the resistance between RH rear window control switch C801-3, circuit CPW23 (GY), harness side and RH rear window motor C803-1, circuit CPW23 (GY), harness side.
      • Fig 10: Measuring Resistance
      GF0016497Courtesy of FORD MOTOR CO.
    • For an inoperative LH rear window, measure the resistance between LH rear window control switch C701-4, circuit CPW22 (GN/VT), harness side and LH rear window motor C703-2, circuit CPW22 (GN/VT), harness side.
      • Fig 11: Measuring Resistance
      GF0016498Courtesy of FORD MOTOR CO.
    • For an inoperative RH rear window, measure the resistance between RH rear window control switch C801-4, circuit CPW24 (WH/VT), harness side and RH rear window motor C703-2, circuit CPW24 (WH/VT), harness side.
      • Fig 12: Measuring Resistance
      GF0016498Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. YES  : INSTALL a new LH or RH rear window motor. REFER to Window Regulator Motor . TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
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