Ha! I like your style, Fatherof3.
Thanks for the input, fellas. Looks like I'll be investigating my transmission to see what happened to the wire that's supposed to be connected to that switch. It probably hasn't been hooked up in years. I've only driven the truck on a couple mile long test rides as I've been working on it for several months, so I didn't even notice.
Just when a guy thinks he knows everything...