jk you can find your wire diagram and installation diagram on this site
just enter your year etc.
I downloaded your wire diagram and printed it. I noticed that if you have a 30amp circuit breaker in the middle of your main box of circuit breakers, you then have another circuit breaker box which should be somewhere in the area of your inverter. Check those breakers out. Sometimes the breakers can trip and you can't see the red flag very well.
I believe the GFI in your kitchen area serves your exterior bay plug.
We Minnesotan's are in the process of shipping some nasty cold weather your way so the trouble light might be very important for you in a day of so.
Anybody else with a 2007 Winnebago Journey 36G could maybe lend a hand.