Pinpoint Test C: A Single Power Window Is Inoperative - LH Front, MKX

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.

C1 CHECK THE POWER TO THE WINDOW MOTOR
- Disconnect: LH Front Window Motor C540.
- Measure the voltage between LH front window motor C540-1, circuit SBP01 (RD), harness side and ground.
  
  Fig 1: Identifying Measuring Voltage Between LH Front Window Motor And Ground Connector End View
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to C2 .
- No: VERIFY Body Control Module (BCM) fuse 1 (30A) is OK. If OK, REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to WINDOW MOTOR INITIALIZATION . TEST the system for normal operation.
  If not OK, REFER to the appropriate SYSTEM WIRING DIAGRAMS article 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.
C2 CHECK THE LOGIC POWER TO THE WINDOW MOTOR
- Ignition ON.
- Measure the voltage between LH front window motor C540-3, circuit CBP32 (GN/VT), harness side and ground.
  
  Fig 2: Identifying Measuring Voltage Between LH Front Window Motor And Ground Connector End View
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to C3 .
- No: VERIFY Body Control Module (BCM) fuse 32 (15A) is OK. If OK, REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to WINDOW MOTOR INITIALIZATION . TEST the system for normal operation.
  If not OK, REFER to the appropriate SYSTEM WIRING DIAGRAMS article 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.
C3 CHECK THE WINDOW MOTOR GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Measure the resistance between LH front window motor C540-4, circuit GD133 (BK), harness side and ground.
  
  Fig 3: Identifying Measuring Resistance Between LH Front Window Motor And Ground Connector End View
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to C4 .
- No: REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to WINDOW MOTOR INITIALIZATION . TEST the system for normal operation.
C4 CHECK THE LH FRONT WINDOW CONTROL SWITCH-TO-LH FRONT WINDOW MOTOR FEEDS
- Disconnect: LH Front Window Control Switch C535A.
- Measure the resistance between LH front window motor C540-6, circuit CPW10 (YE/VT), harness side and LH front window control switch C535A-7, circuit CPW10 (YE/VT), harness side.
  
  Fig 4: Identifying Measuring Resistance Between LH Front Window Motor And LH Front Window Control Switch Connector End View
  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 C535A-8, circuit CPW29 (VT/GY), harness side.
  
  Fig 5: Identifying Measuring Resistance Between LH Front Window Motor And LH Front Window Control Switch Connector End View
  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 C535A-4, circuit CPW11 (BU/GY), harness side.
  
  Fig 6: Identifying Measuring Resistance Between LH Front Window Motor And LH Front Window Control Switch Connector End View
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to C5 .
- No: REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to WINDOW MOTOR INITIALIZATION . TEST the system for normal operation.
C5 CHECK THE LH FRONT WINDOW CONTROL SWITCH
- Carry out the LH front window control switch component test.
  Refer to appropriate SYSTEM WIRING DIAGRAMS article 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.