wierd power problem?

so every time im driving in the car, the radio works for like 2seconds then turns off completely. i dont think its a fuse cuz it comes back on randomly for a couple seconds then turns off again.
and now my battery complettly died out on me. wut is going on?
is is faulty wiring?:banghead:

i would try tapping in to another hot wire thats hooked to the key being on or did it work it before and now it don't like today it started doing that?

it used to work fine, its just one day the the power to the radio just completly cut out. not even the clock would light up. but when i was driving it just randomly turned on for a couple seconds (scared the shit outa me cuz it just started blasting music) then cut out. and it keeps doing it now.