Paring this down for brevity, and here is some context:
Sold house on July 14, buyer needed us out in 14 days, we obliged.
Closing on the 29th, all good, went off without a hitch :)
Mistake 1. Without previous testing, connected U-Haul auto transport to coach 30 minutes prior to closing. No power.
Left coach at U-Haul, guys said they would look at it. No luck.
Took to shop I used for my cars, 'wiring guy' came up empty handed.
Contacted mobile RV mechanic, they guy litterally spend six hours looking for elusive power source, mostly under the dash. He gave up. Camping World on Tuesday morning.....no help except they were certain it was a Frieghtliner issue and they were essentially correct.
Through multiple calls from me to Winnebago and Freightliner (who were both awesome I might add) I completly understood the issue. Referred me to a shop 13 miles away, really great folks, spend around an hour and 24 hours after discovering the problem we were on our way with a temporary fix. I still need to access the fuse but now I know where it is.
Now, many of you probably already know this but the trailer wiring on the coach side can be fed from a fuse that coach builders put just about anywhere but it's most likely in one of the rear most compartments. Nobody can tell you and no diagram can show you exactly where, you just need to find it. On this coach, it's behind a panel in the shore power/inverter/ATS compartment......that is insane to get behind. Given enough time, we could have gotten back there but at least we found it. The technician wired in a pig tail to the trailer harness and got us on the road.
Oh and one of the first things the guy at U-Haul checked was the receptacle and its connections and the ground. All were solid.
I do appreciate all the responses. We're sitting in Jennings, Louisiana Walmart at the moment enjoying a cup of coffee and watching the sun get ready to come up. Headed to Fernandina Beach, NC, NY, VT, ME for some lobster and then will land in Jacksonville where we'll figure out where we're going to live.