got the wires correct but there is no sound. I have an '04 vibe. the auto place made some calls and everyone thinks that he is crazy and don't believe that there is no sound. he thinks he will have to test each factory wire to find it, any suggestions?

I am attempting to replace my factory radio in my 2004 AWD with an aftermarket Sony CD Player. I have the dash kit and wire harness. When I take out my factory radio there are 2 factory plugs that go in the back of the factory radio but the harness that I bought only has one plug. What am I supposed...