PCM wiring

I'm not familiar with that harness but does it come with a relay and wiring to power the fuel pump?
I would just double check the relay wiring, make sure it is getting a good 12v source, verify the trigger wire is energizing the relay coil - report back what you find.

As for your coils and cranking... The mopar ignition switch gives power to ignition and cranking on two different positions. So I think your problem may be that the "run" wire drops voltage when the "start" wire energizes - try adding a jumper between the start and run wires coming from the ignition switch - this should feel power to the "run" wire even when cranking -

basically our PCM is not getting power during the cranking cycle and therefor wont light the engine off.