If you mean the in-dash radio there are at the minimum two fuses, likely 3 or 4, Plus the radio may not be the only device you need concern yourself with.
On my dash radio.. I had power issues, Never did find the bad connection but I bypassed it so got solid power now.
But I still had audio cut out (only now the radio stayed on) I traced it down to an area where there is a high power stereo amplifier (The same speakers are used by the home theater, which is high power, and thus they need the power amp to make 'em work) Was trying to figure out how to get it to a position I could work on it when I found a relay box.. The Relay box had half a dozen or so RCA (phono) connectors (This is a push on type coxial connector) that were all nice and tight.
What it took me a few hours to figure out is there are also two MOLEX conenctors.. I knew the relay was working because I heard it switch when I turned the key on.
Touched one of the molex connectors (These are big, usually milky colored, plastic, multi pin connectors) and it was nice and tight (Home theater out goes to this one)
Touched the other.. It moved, I heard a SNAP as the lock tabs on the molex connector snapped home and
Sound Glorious Sound, Sound from all the speakes (Well 2/3 of 'em) Sound glorious sound, System it was working.
I have not driven since that date... But I'm a bit over 99% sure I got it.
My rig is a Damon Intruder and all this stuff is in back of the parking brake pedal on my rig... YOURS.. Likely different,.
Home is where I park it!