You are right, I'll update the Jeep info.
We cleared all the codes, last time it happened again in 10 minutes and the time before it was 5 days before it happened. I'm of the same opinion that its the wiring. I've been in electronics my whole life but I sure not fond of digging into auto wiring.:( I have the full schematics, so I guess I'll have to do it sometime.

Sorry about the edits, but I wanted to ask - I've never had the skid plate off this thing. It looks like it supports the transmission. Sure would be easier to check the wiring if it was off. Any surprised in pulling the plate? Ok to drive without it for short 'on road' tests?