Greetings
What radio is in your XYZ motorhome?
If you don't have a volt ohm meter you'll need one for a lot of rv repairs.
Don't be intimidated by a meter they're cheap and amazingly easy to learn for basic ac and dc repair.
Here's one at your favorite big box store.
https://www.walmart.com/ip/HOTBEST-L...830L/847138203
On line
https://www.amazon.com/WeePro-Vpro85...dDbGljaz10cnVl
Checking the fuse is a good start but almost never solves the problem.
Welcome to the forum and keep us updated.