I just bought a '99 mustang with a 3.8 v6 with auto trans
. It came with aftermarket cd player and face was broken so i changed with new unit. used same aftermarket harness that plugs into factory harness. now I have no sound out of any speaker. new unit working good. tested it with seperate speaker i had laying around and hear music. checked connetions on speaker harness and making good connnetion. same thing happend to a buddy of mine with his '98 mustang and he ended up running all new speaker wires to fix problem. I just figured i would see if anyone knows whats going on before i do the same thing. And input is welcome. Thanks!!