02 Dodge Dakota 3.9 v6 "NO BUS"

NO BUS no start, cranks will not start, currently I have checked the bus line, ohms out with a dvom from the dlc to the computer, reman computer that has been programmed for the truck(vin, mileage) crank sensor, cam sensor, tps and map all show good.......this truck came from a local body shop, hit in the right front corner(pcm) the truck has been repaired, third PCM, wiring harness hass been inspected???? 30 yr master tech and this thing has me stumped!!! any suggestions?

You most likely have a shortted sensor somewhere in the engine or transmission harness, when this happens the 5 volt reference shorts and the pcm shuts itself off to prevent damage from the excess current going back to the pcm. To determine which sensor unplug one at a time and cycle the key to see when communication returns. On Dodges of most types and years it's the crank sensor or cam sensor but I've seen it be the tps, the A/C sensors and switches, 02's and I've heard of solenoids in the transmission doing it as well. The crank sensor is the most common and I know you stated it's new but I've seen and read about huindreds of repeat failures with aftemarket brand crank sensors on Dodges that if it's not a dealer part I also replace it. when you have the no bus message you also won't have the check engine light illuminated so if you don't have a scanner hooked up when you cycle the key look for it to illuminate, unplug the crank sensor first and the the 02's. this is assuming of course that you've checked the powers and grounds circuits to the pcm and that your replacement isn't defective.

HTH and let me know how you make out