Well i went to put i an alpine cda 7897 and i hooked the harness up and everything and it turns on, just no sound comes out of the speakers, there are two wires that went on the stock deck that i didn't use, no place to plug them in, they are a black wire with a blue stripe that just went on a clip on the back of the stock one, and a two wire harness that i think went to the steering wheel controls, I have a 99 with the infinity stereo, anything i'm missing any and all help would be great thanks