Well, Im hoping I found the problem. After taking nearly half of the dash apart just to get to the 4 screws that hold the instrument cluster in, I tried sliding the cluster out to disconnect the wires. To my amazement, the cluster just popped right out with no wires holding it on! Wondering how any thing worked on the cluster, I looked behind it after I got it totally out and found out that the wire harness is clipped to the metal framework of the dash and the pins on the back of the cluster just "rest" into the wire harness. To add to the matter, the wires in the harness were loose in the connector which could have also been adding to the problem. Seeing no easy fix, I ended up putting dielectric grease on the wire harness connector and then reinstalled everything. So far, everything seems to be working and have yet to lose the cluster instrument lights.