I was putting a new head unit in my car today, I put the harness in and have all the wires lined up properly. I have done it before and sure I am doing good there. Where I am having a problem is my power line is getting no power, I have tested it and its not getting any power whatsoever to the red or yellow lines of the harness. I have checked my fuses and everything on them shows to be fine as well. Any ideas of why I have lost power? I had my head unit in there before working just fine right before I went to do the install.