You can buy 12 volt fuses that glow when they have been blown. You might want to get those and replace all the fuses in your fuse panel. If you have another fuse blow it will help a lot with your troubleshooting.
I am not familiar with your coach. I know my allegro bus has 5 different locations with 12 volt fuses in it. Like someone suggested get a wiring diagram and call the manufacturer to find out where all of the fuses are located. Make notes in the wiring diagram where the fuses are and what circuits they power.
Also at some point turn in your learning experience. Turn off all AC power, turn off the breaker at the shore power pole. do not start your generator, turn off your inverter. Now with all of those off. See what works in your coach. What lights, fans, etc. These are all items that run off of 12vdc and will have an automotive type fuse that protects it. If they do not work you can look for the auto style fuse.
All AC items will probably be on a breaker.
2005 Allegro Bus 38DP
2012 Enclave tow vehicle
No Dogs, No cats.