I am currently TBIing an old truck ....I did my CJ5 about 2 years ago.....runs great. I am having an issue with Winaldl not reading on the ecm I have in the truck. 7747 ecms. I can plug it into the CJ and it reads fine. Plug it in the truck and it will not read. I can take the CJ ecm and put it in the truck and it will read. Will not read any other ecm. I have tried 3 of then. Tunerpro is the same way. All the wiring is correct or it would not have been able to read the CJ ecm....what gives?