So now I have integrated the steering wheel controller, and left the fakra cable as is, however the unit will still not switch on, even with the ignition turned up to position 2. The unit seems dead. When I was splicing the cable there were two identical green wires that I could not distinguish. When it didn't fire up the first time, I switched these green cables around.
I haven't fried my existing system as that all works when I plug it back in. Any ideas?