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Home >> Mercury >> 2008 >> Milan Base, 2.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1393 (Windows & Glass - Glass, Frames & Mechanisms) >> Diagnostic Tests >> Glass, Frames and Mechanisms >> Pinpoint Tests >> Pinpoint Test C: A Single Power Window is Inoperative - MKZ, LH Front >> Pinpoint Test C: A Single Power Window Is Inoperative - MKZ, LH Front

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

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
  1. C1 CHECK THE POWER TO THE WINDOW MOTOR 
    • Key in OFF position.
    • Disconnect: LH Front Window Motor C540
      • Fig 1: Checking Power To Window Motor
      GF0028353Courtesy of FORD MOTOR CO.
    • Measure the voltage between LH front window motor C540-4, circuit SBB34 (YE/RD), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  C2.
    2. NO  : VERIFY battery junction box (BJB) fuse 34 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to SYSTEM WIRING DIAGRAMS article 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.
  2. C2 CHECK THE LH FRONT WINDOW MOTOR GROUND 
    • Key in OFF position.
      • Fig 2: Checking LH Front Window Motor Ground
      GF0028354Courtesy of FORD MOTOR CO.
    • Measure the resistance between LH front window motor C540-3, circuit GD126 (BK/WH), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  C3.
    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.
  3. C3 CHECK THE LH FRONT WINDOW CONTROL SWITCH-TO-LH FRONT WINDOW MOTOR FEEDS 
    • Disconnect: LH Front Window Control Switch C535A
      • Fig 3: Checking LH Front Window Control Switch-To-LH Front Window Motor Feeds (1 Of 3)
      GF0028355Courtesy of FORD MOTOR CO.
    • Measure the resistance between LH front window motor C540-1, circuit CPW10 (YE/VT), harness side and LH front window control switch C535A-7, circuit CPW10 (YE/VT), harness side.
      • Fig 4: Checking Circuit CPW29 (VT/GY) For Open
      GF0028356Courtesy of FORD MOTOR CO.
    • Measure the resistance between LH front window motor C540-5, circuit CPW29 (VT/GY), harness side and LH front window control switch C535A-8, circuit CPW29 (VT/GY), harness side.
      • Fig 5: Checking LH Front Window Control Switch-To-LH Front Window Motor Feeds (3 Of 3)
      GF0028357Courtesy of FORD MOTOR CO.
    • Measure the resistance between LH front window motor C540-6, 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? 
    1. YES  : Go to  C4.
    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.
  4. C4 CHECK THE LH FRONT WINDOW CONTROL SWITCH 
    • Carry out the Master Window Adjust Switch Component Test. Refer to 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 and Motor - Front Door . 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.
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