I bought a 95 vert with the 460 system, the previous owner installed a decent blaupunkt head unit in it but it must not be going through the amps. It distorts real bad before you can get any real volume out of it. I bought another 460 head unit and tried to hook it up. It looks like they did the right thing and didn't cut any of the factory harness off,but I'm not sure. When I hook up the 460 head, I get no sound from anywhere. It has power, tunes,shows volume, but no sound. My question is, how many plugs go into the back of the head unit? If I can get sound out of the blaupunkt, why cant I get anything from the 460? HELP PLEASE. I searched and have the schematics but there not very clear, I cant read half of it, and don't understand the other half