All right guys I've got an odd one here. Got a customer with an 09 F-350 originally 6.4 diesel that has swapped in a 12v cummins. I plugged into it to read the ECM but all I can see is the TCM. I was able read and save the file but when I open the file it only shows transmission data. Would this be due to a missing ground on the ECM? Any help would be appreciated.