Hi, I have a 2011 Ford F150 with the 5.0 V8 and 260,000 miles. I got in the truck yesterday, put the key in, and NOTHING. The instrument panel doesn't light up and it won't even try to turn over. The battery is fully charged and the lights, radio, etc. all work. One other thing- when I put the key in the ignition, the headlights come on and stay on for about 10 minutes. All the fuses and relays are working. Fuse 27 was burned pretty bad, but it wasn't blown.

I've never had a problem like this before. Anyone have any idea what might be going on?

Thanks, Al