Ok had a local tuner come to me and try to flash my truck (2019 RAM Cummins dually).

It went to 6%, then failed the flash.

We did have the battery charger on 40A, but the batteries were fully charged.

Whenever we try to establish communications, no dice.

Does anyone know how to recover one of these ECM's?

One thing to note is I did unplug both batteries at midnight and haven't touched the truck since.

Please help.

Once this is complete, I will finally be able to try out my Allison Swap.