stereo wiring help needed. I think I got almost everything hooked up right, but I need to find a ignition wire. so the radio turns on when the car does. I got a kenwood kiv-bt900. 07 mustang gt, factory shaker 500 being replaced.

 

Hook it to an accessory spot in the fuse block. Also if you're not comfortable doing that and you don't use your cig lighter, you could run it off that wire. But if you do, make sure that fuse is the same size as the radio fuse in the block. Change it if you need to.