97 4.2L V6 50K auto
I looked around the door frame to find a switch but couldn't locate one. Is it hidden uder rubber seal? Thanks.

 

here you go. read this.
https://www.f150online.com/forums/sh...d.php?t=193352

 

And thats all you need to read about that!

 

Thanks. Mine was a slightly different problem but at the same location. A small piece of plastic got wedged in the space. The light is now working properly. I would have never suspected the door lock for switching interior light.