Pinpoint Test C: A Single Power Window Is Inoperative - LH Front, MKX
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.
- 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 SBP04 (GN/RD), harness side and ground.
- Is the voltage greater than 10 volts?
Courtesy of FORD MOTOR CO.
- YES : Go to C2.
- NO : VERIFY smart junction box (SJB) fuse 4 (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.
- C2 CHECK CIRCUIT CBP41 (BU) FOR AN OPEN
- Key in ON position.
- Measure the voltage between LH front window motor C540-3, circuit CBP41 (BU), harness side and ground.
- Is the voltage greater than 10 volts?
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- YES : Go to C3.
- NO : 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 CIRCUIT GD133 (BK) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between LH front window motor C540-4, circuit GD133 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
Courtesy of FORD MOTOR CO.
- 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.
- 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.
- 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.
- Are the resistances less than 5 ohms?
Courtesy of FORD MOTOR CO.
Courtesy of FORD MOTOR CO.
Courtesy of FORD MOTOR CO.
- 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 COMPONENT TESTING.
- Did the window control switch pass the component test?
- YES : INSTALL a new LH front window motor. REFER to Glass, Frames and Mechanisms - Exploded View, Front Door and Window Regulator and Motor - Front Door . 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.