I have an '04 F350 with the key pad on the door to unlock the doors. Mine is the one that I believe is stuck on and is raised on the door, not the one that sits more flush with the door skin. It still works, but I noticed the other night that it does not light up as bright as it use to. Are there batteries in it? Are they replaceable? I havent wanted to go out and try prying it off before I checked to see if it was even possible.