Pinpoint Test B: A Single Power Window is Inoperative - Driver Front

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Power Windows for schematic and connector information.

Normal Operation 

When the accessory delay relay is energized, battery voltage is provided to the driver window control switch through circuit 193 (YE/LG). The driver window control switch is grounded through circuit 57 (BK). When the driver window control switch is moved to the window DOWN position, voltage is supplied to the driver window regulator motor through circuit 227 (YE) and ground is supplied through circuit 226 (WH/BK). When the driver window control switch is moved to the window UP position, voltage is provided to the driver window regulator motor through circuit 226 (WH/BK) and ground is supplied on circuit 227 (YE).

This pinpoint test is intended to diagnose the following:

• Wiring, terminals or connectors
• Driver window regulator motor
• Driver window control switch

PINPOINT TEST B: A SINGLE POWER WINDOW IS INOPERATIVE - DRIVER FRONT 

1. B1 CHECK THE DRIVER WINDOW CONTROL SWITCH FOR CORRECT OPERATION 
   • Key in OFF position.
   • Disconnect: Driver Window Control Switch C504a, C504b
   • Preform the component test for the driver window control switch. Refer to COMPONENT TESTING .
   • Is the driver window control switch OK? 
   1. YES  : Go to  B2.
   2. NO  : INSTALL a new driver window control switch. TEST the system for normal operation.
2. B2 CHECK CIRCUIT 227 (YE) FOR AN OPEN OR SHORT TO GROUND 
   • Disconnect: Driver Window Regulator Motor C524
   Fig 1: Measuring Resistance
   Courtesy of FORD MOTOR CO.
   • Measure the resistance between driver window control switch C504a-6, circuit 227 (YE), harness side and driver window regulator motor C524-2, circuit 227 (YE), harness side; and between driver window control switch C504a-6, circuit 227 (YE), harness side and ground.
   • Is the resistance less than 5 ohms between the switch and motor; and greater than 10,000 ohms between the switch and ground? 
   1. YES  : Go to  B3.
   2. NO  : REPAIR the circuit. TEST the system for normal operation.
3. B3 CHECK CIRCUIT 226 (WH/BK) FOR AN OPEN OR SHORT TO GROUND 
   Fig 2: Measuring Resistance
   Courtesy of FORD MOTOR CO.
   • Measure the resistance between driver window control switch C504a-5, circuit 226 (WH/BK), harness side and driver window regulator motor C524-1, circuit 226 (WH/BK), harness side; and between driver window control switch C504a-5, circuit 226 (WH/BK), harness side and ground.
   • Is the resistance less than 5 ohms between the switch and motor; and greater than 10,000 ohms between the switch and ground? 
   1. YES  : INSTALL a new driver window regulator motor. REFER to Window Regulator and Motor - Front Door .
   2. NO  : REPAIR the circuit. TEST the system for normal operation.