well i got my alpine awhile ago but never hooked it up on the bimmer....well i went to hook it up since i didnt have a radio.

there are wires back there but i didnt know what was waht since all of them were cut (the amp harness, radio and antenna)

so i hooked up so far

Batt
Ground
12 volt switched
and all the speakers

The radio turns on but no sound comes out...i still have a white one from the radio harness, and 9 wires from the amp harness...what do i do??