After much help from Que89YJ and a few days with a DVM glued to my hand, it runs.
I ended up putting a jumper from ground to the sensor ground. This provided the ECT, TPS and IAT sensors with the ground it was missing.
I then disconnected the battery to clear the codes.
When I tried to start it, I was getting the following codes:
12 - Battery disconnected
11 - Cam or Crank Sensor
55 - End of Message
I have aleady replaced the crank sensor, so I backprobed the Cam sensor, it tested good.
At this point I decided that I was going to do the same to the Crank sensor to check for signal.
The ignition was in the on position, when I grabbed the connector for the Crank sensor, the fuel pump primed. I noticed that I could get it to cycle on if I moved the wires around. Had the wife crank the jeep while I wiggled the wires and she fired right up (the jeep, not the wife).
Once again, big thanks to Que89YJ for all the help.