I removed my 93 240 instrument cluster so I could change the broken trip reset button. When I had it out, I saw a small spring fall out.

I believe this hooks on the bottom of a small circuit board on the left side of the odometer - this is what I'm seeing: On the 93, there is a button in the far right hand corner. It has a plastic sleeve on it (when it is inside the full instrument cluster housing), so you need to push something through that to actually push the button in. It is connected to a lever on the back side of the panel. The mechanism will push a switch up and looks to dis-engage a black and white cog gear that would otherwise be engaged with a blue spindle on the left side of the odometer gears that are black, red and blue. Do you know what that button is for? and what that whole setup is?

As I said before, I took the instrument panel out to replace a broken trip reset push button and a tiny spring fell out. In examining the board, I believe that spring is used to hold that white and black circle gear in an engaged position. I also think this is where the spring goes b/c there is a screw on the bottom of the board the white and black gear is on that sticks out a bit and would be a wonderful place to hold the end loop of the spring. I'd like to put that spring back on, but need to know that this is the correct place (I figure it would just connect to the other circuit board next to this mechanism (looks a little warn on top where the spring might have been resting.

Hopefully, for those that are familiar with a 93 instrument cluster, I've explained this well enough and you will know what I'm looking at, and you will be able to advise me as to what this white and black cog wheel is doing, what that "reset" button is for in the far lower RH corner and if that is the correct place for the little spring.