I am having problems with my 2006 Ford F-150 XLT Supercrew 5.4L V8. The problem I am having appears to be an electrical one. It started with my power doors and windows operating intermittently. Sometimes they would work, other times I would have to open the door just right in order for them to work. Then a couple of weeks ago I went to start it and it wouldn't start. When I turned the key nothing would happen. The power inside the truck would not go off. The gauges were still operating and the radio was on even though the key was off and the door was open. Yesterday this happened and I finally got it to start, but when I turned off the key and removed it, then engine was still running then finally died, but all power inside the cab was still on. Can anyone help me with this issue. I tried replacing the ignition switch, but that didn't work either. It kept doing the same thing.

Todd