OP here...
My Saturn is over at a body shop having the tow bar installed and I thought I'd get to work on checking the electrical here on the RV.
So I turn the ignition to run, turn on the running lights, and turn on the left flasher. With my drawing of typical 7-Pin RV wiring in hand I went in back and measured voltages. NOTHING! Not a single volt where it was suppose to be. Nothing on a single electrical tab. Then I moved my DVMs ground lead from what's suppose to be ground, directly to chassis and tested again. Still not a single volt. I followed the wire bundle as far back as I could, and everything looked fine.
Gah!
I know the PO towed because they left me their Blue Ox tow bar, their Brake Buddy, and the manuals. But there's no electrical signals or power on the trailer connector?
Any ideas? Is there some secret junction box on a Winnebago Journey 2002 DP?