I have a 2006 Cobalt LT with the pioneer system in it. I wired up a harness for a new H/U that I am putting in. I matched the colors and what not, when I plug the harness into my car the interface chimes and everything works fine. The H/U won't power up at all, I checked every fuse and none were blown. I might be making a noob mistake but I'm not sure what I did wrong. Ps don't rip on me when you see the connections on the harness they are only temporary until I figure out the problem.