I have a 67 mustang and I want to install a cd player. I am not sure about the wiring. I don't think there is any kind of wiring harness for this. If anyone else has done this please tell me how you wired it.

 

If there aren't any existing wires, then you have to run them all yourself. All you really need are 3 wires. Run one wire directly from your battery and through the firewall for you 12v lead. Bolt another wire down to the chassis somewhere inside the car for your ground. Find your igntion wires and splice a third wire into one of them, and that is all you need to power the cd player. After that, just run all the wires from the speakers to the CD player.