I am sorry I cannot be of too much help but I can tell you that module uses the CAN bus. I had a window motor module go out mysteriously. Perhaps you can get someone (dealer) to test it? They have a device they can plug into the car and see if it will communicate. As far as a used one, you can try www.car-part.com. The hard part is finding the part in their long list of parts. But once you do you will likely find one somewhere for under 100.00 (I am guessing). I got my window module from a place called Jacks in Billerica Mass as I recall and they guaranteed it would work and it did. Cost me 65.00.

Mike

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra