So I installed EVERYTHING, the Bose amp, the new Infinity speakers and the CD changer but now I get an E-01 on the head unit screen when I turn it to CD. I actually did not put the radio in so there is a good chance that the cable is simply not plugged into the head unit, however, I do not even know if it would give me an error code if it was not plugged in. I have an alpine adapter, that will basically turn the female end of the CD changer into a male end, which would allow me to test each pin; the only thing is which pin should I test for power to the unit? Also, should it just read something like 12v. Any help with this would be greatly appreciated. Thanks in advance.