Amp Wiring

Ok I just bought my accord and there was wiring for a system but one of the wires I cant figure on how to hook it up. There is the think red wire, black wire, rca cables, and a thin blue wire. where does that blue wire hook up to?? is it hooked up to the car or the headunit??? I see the part for it on the amp but dont know where to run it too?? Thanks

Red goes to 12v, the black is ground, the blue is the remote turn on that goes to the headunit

what wire do I soder it to???

What head unit (aka CD player, deck) do you have? There should be a matching blue wire on the back somewhere. Oh, and try solderless crimp-on butt connectors for joining your wire... they're so freaking fast to put on, and work 98% as well as soldering. You can get a pack of like 100 at wally world for like 5 bucks over in the automotive section (next to the headlight bulb display, most likely).

Pioneer head unit....LOL what is wally world?? I dont think we have those in MD, we have wal-mart and pepboys. I'll check there thanks.

Wally World = Walmart... sorry, some people call it that.

Any comments about my 12 volt AC->DC power supply idea?