Does anybody know how the spotlight works and how everything moves? I know when you twist the handle, the gears are supposed to make the actual light assembly move right to left, is this correct? All I see is one gear on the spotlight end of the assembly and I don't see how anything from inside the cab turns that gear. I turned the actual light by hand and the gear turned, but nothing else was affected. Am I missing a gear on the spotlight end? I probably need a good used one because the rivets on mine where the light housing attaches to the assembly are rusted and I can't remove the nut that is holding the light housing on either.