AEM troubles

Thanks for the responses guys, those are great suggestions! I'm suspicious that heat may have caused the issue but I know that it's not maintaining it, if that makes sense. I went through the whole round of troubleshooting the day after the car was towed, in other words everything was completely cooled down. I would also suspect bad grounds but the grounds (and permanent & switched 12v) on the connector all test good and solid, ECM still won't come back to life. To give some background, I way overbuilt the grounds on this car, lol! I have a 00 ground cable from battery (in trunk) to the shock mount bolt (superfluous now with 4 link) on bare metal, star washered, and painted over, grounding the chassis very well. Further up another 00 cable connects a stud/bolt in the frame (similarly prepped) to a bell housing bolt (into rear of block), which the EFI system ground is also star-washer sandwiched to. Just to be sure I also grounded the front left cyl head to the AlterKtion frame via 8ga cable.

One other thing left to try is doing a "pull through" test on each receptacle in the ECM connector with a dental pick or something similar or smaller size than the ECM pins to ensure each pin is making contact when the ECM is plugged in.

In the meantime I'm on the hunt for another ECM:
Want to Buy AEM (Mopar Performance) grey box P5153528!!! Please let me know if you, or anyone you know, has one to part with. Thank you very much!