help me out

[96greenGT]

Can someone unplug their mach 460 cd player and see if it affects the volume of the radio? I have a 96 gt that the sound won't get any louder than a whisper and I can think of 3 possibilities 1.cd player has to be plugged in 2.wire that signals amps to turn on is screwed up 3.amps have gone to crap.... so thanks for any input u guys can give me