My friend's got a nice little supra. I tried to help him out and put in his pioneer deck, but the trouble with it was that after finding power, ground and ignition, the only way i could get any of the speakers to sound was by hooking up remote ant. (blue w/white stripe) wire. Now when he turns it barley to 5(volume) its already really loud. What is messed up? What do I have to do for this to work correctly?