Guys thanks for the good ideas. Applying power direct to the motor must be the solution. I keep thinking that if I took it to the dealership they would fix it, so there must be a way. There are 3 motors under the seat, and none of them match the color wires that are shown on the schematic in the service manual, so no way to tell which motors moves the seat front and back.
An additional wrinkle is that the seat module is listed as a discontinued part....so even if I got the seat out so I could replace the module, I don't have a replacement module.
I'm leaving it alone for now...at least the seat is stuck in the right position for driving, although my wife needs a pillow behind her... I'll start scouting for a replacement module and continuing to research, and I'll get back into this fix when I get some time.