on the wire colors google it i found many different sites that will give u a free accuret chart it will tell you what color gose to what color on the radios harness and it will tell you wat each wire is for
4 the wires at the speakers you can 1. look at the speaker it self and it will have the (+,-) really small on it and 2. there is like 5 billon colorer combos 4 the wire but 4 the speakers the (-) wire should have a spasific marking on it that all the speakers (-) wires should have hope i helped