Lexus Radio Not Working At All

[deeperz]

ok here it is i have a 92 lexus es 300 and i was messing with my cd player one day cuz it goes on and off and then..out of no where my head unit shuts off...i checkd all the fuses...and i have done everything...i recently just bought a new head unit a pioneer 50 time 4 watts and now i am trying to hook it up from scrath...can some one plz assist me on how to rewire it to the fuse box and then to the battery....i need help plz ....