I had just bought a 2011 ford focus SE and I already had a 12" sub with a built in amp and a pioneer deh-s31bt as a head unit on hand from my old car. I bought the wiring harness kit from metra for wiring the head unit. This specific car has no steering wheel audio controls. I literally have everything working other than I can't get it to turn off with my car. When I kill the engine and get out of my car it just keeps playing and draining my battery so I've just been driving with it unplugged for now. Please help im at a loss right now I feel like I've tried everything.