I am looking at adding a amp to the head unit in my c2 looking for the wiring diagram for the speakers any help would be great
I've done this one while installing an Alpine power pack KTP-445 on my C-4. My HU has more connectors on the back, but I'm kinda positive that the audio outputs are the same. See if it will work out for you.
Don't bother and just replace the head. When I was doing my install I did head before replacing the speakers and the improvement was astonishing.