The power window switch, when moved down, activates the battery's electrical circuit and energizes the motor. This allows the window to wind down. At the same time, moving up reverses the polarity causing the window to wind up. The driver side window switch works differently; when pressed all of the way down, the window will go all of the way down without the driver having to hold the switch down. The switch automatically returns to rest when it detects an increased current draw due to the window being at the bottom. The power window motors can either be tested by trying to operate the window or by checking for power on the yellow wire with the ignition switch on after removing the master switch assembly. Test for continuity to earth at the master switch black wire if at least one window works and check that each motor is powered and earthed. If no power and earth are present with the switch assembly, change it. If there is power and earth. Remove the door trim panel of the faulty window. Unplug the motor wiring. Connect a test lamp. Press the switch and check for illumination. To perform the test, make sure the wiring of the driver's door motor is connected, and if you are using an LED test lamp, check that it illuminates in both positions of the switch. If the light doesn't shine, check the wire for an open circuit. When the lamp illuminates, use an ohmmeter to check the continuity across motor wiring connector terminals. If the circuit is open, the motor is suspect. To remove the power window master switch, the retaining screw must be removed. Then the switch panel is pried from the door trim with a plastic wedge. Disconnect the wiring, and separate all components. The procedure for the rear power window switches is to remove the door trim panel, unscrew the switch and withdraw it. The same goes for the front passenger switch. The installation is the reverse of removal. Ensure the wiring is secure. The body section describes a procedure to remove the power window regulator motors.