Test C: Single Power Window Inoperative

1. Check the master window regulator control switch. See POWER WINDOW SWITCH  under COMPONENT TESTS. Is the master window regulator control switch OK? If yes, then go to next step. If not, then replace master window regulator control switch. See POWER WINDOW SWITCH  under REMOVAL & INSTALLATION.
2. Check the window regulator motor. See MOTOR  under COMPONENT TESTS. Is the window regulator motor? If yes and the left window is inoperative, go to next step. If yes and the right window is inoperative, go to step  8. If the motor is faulty, replace motor and retest system. See MOTOR  under REMOVAL & INSTALLATION.
3. Turn the ignition switch to OFF position. Disconnect the power window module connector. See POWER WINDOW MODULE  under REMOVAL & INSTALLATION. Measure the resistance of the Black wire between the power window module connector and ground. See WIRING DIAGRAMS . Is the resistance less than 5 ohms? If yes, then go to next step. If not, then repair the Black wire.
4. Turn the ignition switch to ON position. Measure the voltage on the Blue wire at terminal No. 6 of the power window module connector. See Fig 1. See WIRING DIAGRAMS . Is the voltage greater than 10 volts? If yes, then go to next step. If not, then repair the Blue wire.
5. Turn the ignition switch to OFF position. . Disconnect the left front window regulator drive motor connector. Measure the resistance of Blue/Red wire and the Pink wire between the power window module connector and the left front window regulator electric drive connector. Measure the resistance of the Blue/Red wire and the Pink wire between the power window module connector and ground. See WIRING DIAGRAMS . Are the resistances less than 5 ohms between the power window module and the left front window regulator electric drive, and greater than 10,000 ohms between the power window module and ground? If yes, then go to next step. If not, then repair the faulty circuit.
6. Turn the ignition switch to OFF position. Measure the resistance of the following wires between the master window regulator control switch connector and the power amplifier connector:
   • Blue/Red wire
   • Blue/White wire
   • Blue wire
   See WIRING DIAGRAMS . Are the resistances less than 5 ohms? If yes, then go to next step. If not, then repair the faulty circuit.
7. Measure the resistance of the following wires between the master window regulator control switch connector and ground:
   • Blue/Red wire
   • Blue/White wire
   • Blue wire
   See WIRING DIAGRAMS . Are the resistances greater than 10,000 ohms. If yes, then replace the power window module. See POWER WINDOW MODULE  under REMOVAL & INSTALLATION. If not, then repair the faulty circuit.
8. Turn the ignition switch to OFF position. Disconnect the right window regulator control switch connector. Turn the ignition switch to ON position. Measure the voltage of the Orange/Black wire at the right window regulator control switch connector. Is the voltage greater than 10 volts? If yes, then go to next step. If not, then repair the Orange/Black wire.
9. Check the right window regulator control switch. See POWER WINDOW SWITCH  under COMPONENT TESTS. Is the right window regulator control switch okay? If yes, then go to next step. If not, then replace the right window regulator control switch. See POWER WINDOW SWITCH  under REMOVAL & INSTALLATION.
10. Disconnect the master window regulator control switch connector. Measure the resistance of the Light Green/Black and Orange/Blue wires between the master window regulator control switch connector and the right window regulator control switch connector. Measure the resistance of the Light Green/Black and Orange/Blue wires between the master window regulator control switch connector and ground. See WIRING DIAGRAMS . Are the resistances less than 5 ohms between the master window regulator control switch and the right window regulator control switch, and greater than 10,000 ohms between the master window regulator control switch and ground? If yes, then repair the wire between the right window regulator control switch and the right front window regulator electric drive. If not, then repair the faulty circuit.

Fig 1: Identifying Power Window Module Terminals

Courtesy of FORD MOTOR CO.