My only real experience with Thick Film Ignition (TFI) was with a friends pickup truck, that thing seemed to just eat the module on the side of the dizzy. He changed so many of them he kept one in the glove box! One night we were headed home when the truck just died.. we popped the hood and I had him turn it over while I watched for spark at a plug wire. There wasn't any but I did see something spark where it shouldn't have! Turns out one of the injector wires had rubbed bare against the fuel rail! We taped it up and the truck never "ate" another module.. So any short under the hood seemingly will take out that module. Keep that in mind when working with the wiring and maybe disconnect the module first to protect it.