I would start be unhooking the other 5 volt sensors one @ a time, think Ford DPFE with the metal case shorted to 5 volt ref. I would prob start with the cam & crank sensors. If you can't find any sensor issues back that terminal out of the PCM connector and recheck,it you have 5 volts on the PCM side and not the harness side, I would say bad PCM. Did you happen to notice if CEL came on in bulb check?
If you end up needing a PCM let me know as I have a Mopar reman upstairs that did not fix one years ago that I would donate.(I now avoid some Mopar stuff like the plague, the Neon being @ the top of the list