Let me know how you checked for power and ground for the ECM. we need to check with a test light or multi meter to make sure we have power and that there is no voltage drop. ECM should be hot all the time on pin A(white/red wire)
black wires are the grounds. You can disconnect the ECM connector and ohm out the grounds, less than 5 ohms is good. let me know if you have a multi meter.
let me know what you find
lets start here
I have a multi-meter digital I will check them and get back to you
it is getting late in NY. I work on Saturdays too. I check in on this site during the day so if you reply I will see it.