How to repair problem code P1747 Mamurfacturer Control Transmission

Hi I have a 1997 Ford Thunder bird LX 4.6L V8. I have had this problem last fall and I have it now. When it happened the first time I installed a new pressure solenoid and a different wiring in the transmission wiring harness.It ran good for over 3,000 miles or more. Both times it starts with the over drive light blinking then the transmission starts bucking and lose of motor power. This time I took out the computer and sent it to a repair shop in Fla. When I put it back in and made no difference to the car. So I call the repair shop and they said they installed new transistors and diodes for problem code P1747.Manufacturer Control Transmission. They said that the wiring harness from transmission to computer is bad some way and that the computer has gone into protect mode. If I do fix the short will it reset the computer. I have been a auto tec. for over 35 years but this one got me now.