Pinpoint Test B: A Single Power Window Is Inoperative - LH Front

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.

B1 CHECK THE POWER TO THE WINDOW MOTOR
- Key in OFF position.
- Disconnect: LH Front Window Motor C524
- Measure the voltage between LH front window motor C524-1, circuit SBP01 (RD), harness side and ground.
- Is the voltage greater than 10 volts?
1. YES : Go to B2.
2. NO : VERIFY Smart Junction Box (SJB) 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 Wiring Diagrams Manual to identify the possible causes of the circuit short. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization . TEST the system for normal operation.
B2 CHECK THE LH FRONT WINDOW MOTOR DELAYED ACCESSORY FEED
- Key in ON position.
- Measure the voltage between LH front window motor C524-3, circuit CBP41 (BU), harness side and ground.
- Is the voltage greater than 10 volts?
1. YES : Go to B3.
2. NO : VERIFY SJB fuse 41 (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 Wiring Diagrams Manual to identify the possible causes of the circuit short. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization . TEST the system for normal operation.
B3 CHECK THE LH FRONT WINDOW MOTOR GROUND
- Key in OFF position.
- Measure the resistance between LH front window motor C524-4, circuit GD133 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
1. YES : Go to B4.
2. NO : REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization . TEST the system for normal operation.

B4 CHECK THE LH FRONT WINDOW CONTROL SWITCH-TO-LH FRONT WINDOW MOTOR FEEDS

Disconnect: LH Front Window Control Switch C504b

Measure the resistance between LH front window motor C524, harness side and LH front window control switch C504b, harness side using the following chart:

LH Front Window Motor	Circuit	LH Front Window Control Switch
C524-5	CPW11 (BU/GY)	C504b-2
C524-6	CPW10 (YE/VT)	C504b-6
C524-2	CPW29 (VT/GY)	C504b-3

Fig 4: Measuring Resistance

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?

YES : Go to B5.
NO : REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization . TEST the system for normal operation.

B5 CHECK THE LH FRONT WINDOW CONTROL SWITCH
- Carry out the LH Front Window Control Switch Component Test. Refer to appropriate COMPONENT TESTING article.
- Did the window control switch pass the component test?
1. YES : INSTALL a new LH front window motor. REFER to Glass, Frames and Mechanisms - Exploded View, Front Door and Window Regulator Motor . INITIALIZE the LH front window motor. REFER to Window Motor Initialization . TEST the system for normal operation.
2. 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.