well first off stop and avoid last post no t being mena but call the dealer get the two white bulb with made on sockets and simply pull the three knobs off of the control unit and remove the 2 screws pull off fac and walla there sets a a oblong triangle looking peice with two tips that hold it in and replace the 2 bulbs and put it back a 10 minute install done dozens of them. Just wait till ya need a dash light off comes the intire dash cover the cluster come out through top what a dumb thing other than trying to keep people from getting to odometer. It is a pain on the 850 for dash light replacement.