Just purchased a 31' Voyage and have been looking for the fuse box that contains the fuse for the 12V Lighter outlets! I have been looking through the manuals but cannot find the page on location! They show the box but no explanation on where it is.
The fuse for the front ones is under the dash, just flip it up. Fuses are on the left side. It'd be in the fuse block Winnebago added, not the Ford one.
If not there, have you checked the circuit breakers behind the steps? I think it supplies power to the fuse block under the dash.