Need help with fuse that keeps blowing

Usually when you blow fuses it's from too much load, Ie. a positive wire grounding and then overloading the circuit until the fuse blows.

I would start looking at the radio wiring to see if a positive wire could be crossed to a ground.

FYI: The orange wire for the radio is the circuit for the dash lights. I tap into that one to run the gauge lights for my aftermarket mechanical gauges so they will come on and dim with the dash lights.