I owned a '94 Bounder DP for 12 years. Never had that happen. Did have fuses blow and what I did was to take a 2 element 12 volt bulb that has that flat glass part with the wires coming out and looped up onto the glass to make contact when wedged into that type of socket. I straightened those wires, crimped them into spade terminals and inserted them into the terminals for the fuse that was blowing. That saves fuses as the short will cause the bulb to light brightly.
Then I used a DVM to measure at various places along the circuit. Got a chassis drawing from Freightliner...they are good about sending you a PDF of the wiring. When I found very low voltage, I knew that the short was nearby and inspected carefully.
Your problem sounds like one of your main lights outside is shorted. Look for a bulb that is all black.
Also write a travel and RV repair blog and there's lots of stuff about the '94 you might find useful: RV Repair - '94 Bounder