#3588, "RE: need help asap! easy thing im sure" In response to In response to 4
You cut it after the fuse.... its to keep that wire from frying your head unit if it get grounded accidently.
Should be all you need .... if you do end up blowing the fuse once your amp is hooked up you will have to look into getting a relay. It should have enough power to run your amp and your changer though.