My problem is with my brake lights and not my tail lights. I found on another website last night that there is a switch that controls the brake lights that is located under the dash a few inches above the brake pedal. When I disconnected this switch, the brake lights went off. That solved the draining battery problem that I thought I would have this morning.
When I got in the truck this morning, it started fine but I couldn't put it in gear because the steering column was apparently locked. I had to reconnect the switch which put the brake lights back on, but I was then able to drive it to Ford to have them look at it. They have since told me that the switch needed replacement and that there was a short in the wiring that needed to be located and fixed, all to the tune of around $400. Wow, what a shock that was!
Anyway, thanks for all the suggestions, it was much appreciated.