Does anybody know which wire I can use as the remote led amp wire on the factory receiver? I need to know the color of wire to connect and run a Punch 40.

Unless your Xterra has a power antenna, the factory head unit does not have a remote lead. Thus, either replace the head unit or connect the remote lead to a switched source in your fuse box.

Thank you for the help on my question. I will go try the ideas right now.