The driver window circuit uses a current sensor circuit that senses the extra current that is drawn as the motor stalls when the window hits the stop. That turns off the power. If it does not, you probably have the window misaligned. There's no real easy way to disconnect the auto down circuit, without getting into the main power window switch and disconnecting the auto down relay. See the diagram of the switch in the Service manual, volume 8, page GW-2.