i have tried 2 different wiring diagrams off the internet the 12volt.com one or whatever and one off another site (the haynes manual didnt have the diagram at all) but the wires on my stock radio didnt match any of the colors i have a 1999 mercury sable ls with all stock audio so far can anyone help me. i also have the oval of doom with the electric heat controls (i don't know if that makes a difference.