A few days ago I was doing some wiring (some of you may have seen my 'wiring issues' post) and pretty much killed my radio. I know the problem is not a fuse, and I didn't leave any wires cut. I need to find a way to test my head unit to see if that's what I need to replace, or if I broke something deep inside the car's internals. The radio doesn't power up at all and no lights come on. I don't have another car I can put it in, and I don't have another head unit. Everything else on the car still works fine.