Blowing fuses

A 95 Roadtrek has fuses, you just haven't found them yet.
Here is a link that tells where they are.

Class B Forum

In m '95 Roadtrek there are no fuses, only breakers, and I haven't had one trip yet. If you also have breakers they do age and may need replacing.

I think your 'house' fuse box is in the converter, right? Your converter's lid/door may contain a diagram of the fuses that tells which holder goes to what, and what size each fuse should be. The fuses may be undersized. Simplistic, but sometimes overlooked.

If it's different fuses that blow at random, you may have a chaffed wiring harness, most likely near the converter. I can't recall either of my RT's wiring layouts from 10 years back, but I suspect they ran the wires in a common bundle leaving the converter, and splitting off as they went close to the various 12V users. I'd start by inspecting that wiring bundle.

Roadtrek _might_ have a wiring diagram on their website. They're better than most RV makers about such stuff, but I dunno how far back their online stuff goes.

Jim, "Leaves don't fall off of trees. They're pushed."

You might try contacting Roadtrek to see if they have a wiring diagram. I don't know how far back their records go.

From your message I conclude that different 12 volt fuses will blow at random times. Does this happen when using battery power or when using shore power? If you have a generator, does it happen when using the generator for power?

First thing I would check is the DC voltage at the fuse box - both with the converter running and without. Is it too high or low? Any chance the battery was hooked up backwards?
Other than the battery being backwards, I doubt there's anything wrong with the wiring itself.