Odometer segment
Are you talking about the greenish back light? If so here is a post about changing the bulb.
https://www.f150forum.com/f74/04-odometer-fix-10441/
If you are talking about one of the little black lines I have no idea.
https://www.f150forum.com/f74/04-odometer-fix-10441/
If you are talking about one of the little black lines I have no idea.


