Pinpoint Test D: A Single Power Window Is Inoperative - LH Front, Edge

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. 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.

D1 CHECK THE POWER TO THE WINDOW MOTOR
- Disconnect: LH Front Window Motor C540.
- Measure the voltage between LH front window motor C540-1, circuit SBP04 (GN/RD), harness side and ground.
  
  Fig 1: Measuring Voltage Between LH Front Window Motor C540-1 And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to D2 .
- No: VERIFY Smart Junction Box (SJB) fuse 4 (30A) is OK. If OK, REPAIR the circuit. DEINITIALIZE, then INITIALIZE the LH front window motor. REFER to WINDOW MOTOR INITIALIZATION . TEST the system for normal operation.
  If not OK, REFER to the SYSTEM WIRING DIAGRAMS for Edge or SYSTEM WIRING DIAGRAMS for MKX to identify the possible causes of the circuit short. REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to WINDOW MOTOR INITIALIZATION . TEST the system for normal operation.
D2 CHECK CIRCUIT CBP41 (BU) FOR AN OPEN
- Ignition ON.
- Measure the voltage between LH front window motor C540-3, circuit CBP41 (BU), harness side and ground.
  
  Fig 2: Measuring Voltage Between LH Front Window Motor C540-3 And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to D3 .
- No: REPAIR the circuit. DEINITIALIZE, then INITIALIZE the LH front window motor. REFER to WINDOW MOTOR INITIALIZATION . TEST the system for normal operation.
D3 CHECK CIRCUIT GD133 (BK) FOR AN OPEN
- Ignition OFF.
- Measure the resistance between LH front window motor C540-4, circuit GD133 (BK), harness side and ground.
  
  Fig 3: Measuring Resistance Between LH Front Window Motor C540-4 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to D4 .
- No: REPAIR the circuit. DEINITIALIZE, then INITIALIZE the LH front window motor. REFER to WINDOW MOTOR INITIALIZATION . TEST the system for normal operation.
D4 CHECK THE LH FRONT WINDOW CONTROL SWITCH-TO-LH FRONT WINDOW MOTOR FEEDS
- Disconnect: LH Front Window Control Switch C504A.
- Measure the resistance between LH front window motor C540-6, circuit CPW10 (YE/VT), harness side and LH front window control switch C504A-1, circuit CPW10 (YE/VT), harness side.
  
  Fig 4: Measuring Resistance Between LH Front Window Motor C540-6 And LH Front Window Control Switch C504A-1
  Courtesy of FORD MOTOR CO.
- Measure the resistance between LH front window motor C540-2, circuit CPW29 (VT/GY), harness side and LH front window control switch C504A-7, circuit CPW29 (VT/GY), harness side.
  
  Fig 5: Measuring Resistance Between LH Front Window Motor C540-2 And LH Front Window Control Switch C504A-7
  Courtesy of FORD MOTOR CO.
- Measure the resistance between LH front window motor C540-5, circuit CPW11 (BU/GY), harness side and LH front window control switch C504A-5, circuit CPW11 (BU/GY), harness side.
  
  Fig 6: Measuring Resistance Between LH Front Window Motor C540-5 And LH Front Window Control Switch C504A-5
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to D5 .
- No: REPAIR the circuit. DEINITIALIZE, then INITIALIZE the LH front window motor. REFER to WINDOW MOTOR INITIALIZATION . TEST the system for normal operation.
D5 CHECK THE LH FRONT WINDOW CONTROL SWITCH
- Carry out the LH front window control switch component test.
  Refer to COMPONENT TESTING for component testing.
- Did the LH front window control switch pass the component test?
- Yes: INSTALL a new LH front window motor. REFER to WINDOW REGULATOR MOTOR . INITIALIZE the LH front window motor. REFER to WINDOW MOTOR INITIALIZATION . TEST the system for normal operation.
- No: INSTALL a new LH front window control switch. REFER to WINDOW CONTROL SWITCH . INITIALIZE the LH front window motor. REFER to WINDOW MOTOR INITIALIZATION . TEST the system for normal operation.