Many motor homes have several fuse panels.. For example.. In my house there are 2 associated with the Chassis. The AUX panel (Feeds radio) is near the parking brake pedal, the MAIN (All sorts of things including two 30 amp "AUX" terminals that are not connected to anything but are two brass bolts under the panel) under the hood, an unmarked black box, top center.. I found it.. The day before I had to replace one of the fuses inside. Murphy it seems.. took the day off.
And the HOUSE panel.. in addition there are some scattered inline fuses and the power distribution panel I added myself (West Mountain Radio "Rig-Runner" strip. you know those handy 6 outlet strips for 120vac.. Well this one is a 40/12. 12 outlets. With Anderson Power Pole connectors.. Love those things, it feeds radios, (several) Fan, And other stuff. One of the Inline fuses feeds it, Oh, it feeds my Freezer (Engel chest freezer) too. Hooked to house)
I co not know where all the fuses are in your rig but Id guess from the fact the radios affected are basement and bedroom the fuse of interest is in the HOUSE fuse block.. NOTE: This assumes they are 12 volt radios.