Driver's side power window doesn't work

[phatkorean]

I have a 1991 240sx se and my driver's side window doesn't work. I connected a working motor, which was tested on the passenger side, and the motor didn't work. There is no noise coming from the motor at all. I did notice that the wire coming from the window motor connects to a little black box in the door. This black box makes a ticking sound when I press the up or down buttons of the power window. The driver's side controls for the passenger side window works just fine. Anyone have any ideas? And what is that little black box? Thanks.