[misnomer]

The black box is a relay. If it's clicking, it *generally* means it is still working OK. Do you have any way to check for power at the wires? Multimeter, test light, etc. . . If there is power at the wires coming from the relay, you can rule that out as the problem. The motor may not be making any noise because the regulator (the frame/cables, gearbox that everything runs on) might be jammed. Does the window go down? When mine went out, it would go down, but I'd have to pull it up by hand.

If it seems you are getting nothing out of the motor, I'd check to make sure the relay is getting power, use a testlight or voltmeter at the wires that go in to the relay.