Make sure you have the mach 460 sound system,not the premium sound system,theres a difference.
With both cassette player and c/d player out,look into cassette player opening. You should have a factory grey 2 inch wide grey plug(power). Also a smaller 1 inch wide grey factory plug(audio) Okay so far?. Now the fun starts. Get back on e-bay, 94-2000 stang cassette players and c/d players,same place you bid on your c/d player. Wait for someone selling Mach 460 wire harness, power and audio,either year Taro electronics has them, thats where i got mine and there on e- bay a lot. Mine came in four days,complete.You can,t make a mistake plug away,it takes about 5 minutes to do.Don,t forget anttena and black ground clips.