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Not an electrician, but I think black is only "hot" in 110 or 220V household wiring. In cars the black should be the ground. The other two should be the up/down control circuits for the motor.
One way to check is to test with a multimeter(DVOM), set to "Volts".
-Clip the DVOM black wire to a ground anywhere on the vehicle chassis and see which wires have positive voltage going to them. The key may have to be in the "on" position.
-Check for ~12volts at the yellow and brown wires. Check the black to make sure there is none.
If black is ground and the others positive, just jumper a wire between ground and one of the other wires for a second- the window will either move up or down.
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Meanwhile other things are still happening.
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