Engine died. Now won't start

RedFish said
Trying a used ecu is not a true test.

Actually, if you have used/ tested it previously, it's more reliable a test than a "new box out of the box."

RedFish said
These boxes need to be properly grounded

and THAT I should have mentioned. I find it odd that Mopar did not provide a separate ground pigtail through the connector, especially since they are painted or chromed