hello ppl i have a problem,i have a z4 and the radio been stolen so i get a new one,the problem is i have no harness for the cd changer (the wires behind the stereo were cut)so all i need is to figure how is going each wire of the two little harnesses with 12 contact each,one is white and the other is black they are below the main harness(power and speakers),i connect the ipod with the adapter to the cd changer and i have no audio just like the cd changer but in the display it shows the tracks,i hope someone can help me thanks!!!