I think you're on the right track. Try to get the wire harness loose from the seat so you can get a good look. Or maybe even remove the seat from the power pedestal (not difficult usually just four bolts in corners) On my Sun Voyager there are several BIG breakers some located in the forward right bay by my battery disconnect switches. There are a couple in the left side forward bays too. Mine are black with red levers. These things look like switches in a way. If the lever is pointing down that means it needs to be reset.
2005 Sun Voyager Workhorse W24 with 8.1 ltr Chevy. Allison 2100 transmission. Full body paint.