just connect 3 main wires ..red-red, black-black, yellow-yellow .
if u use auto antenna.. take the orange (fm player)
if use preamp@amp .. take the blue wire (fm player)
for speaker (if not use amp) wires, normally 2 same color wires (pair) with black/white lining/spot on 1 wire. test one by one (each pair) to make sure which one for front left, front right, rear left and rear right speaker.
juzz simple like that.
