Im installing an aftermarket deck in my 94 and i hooked up all the wires on the harness and it turns on but no sound. With the factory bose plugged in everything works fine but when i plug the after market deck in i get no sound. If i take a speaker and touch the wires to on of the channels it works so i know the after market deck is working properly. I cant figure this out for the life of me. Is there something speacial about the setup on these cars? Im positive the harness is hooked up correctly being color coded and all. Ideas anyone?

 

Hook up the blue wire. It will turn the amps on. The bose system has amps at each speaker. This should fix it.