Funny instrument cluster-wtf???

[vaman4215]

Well tonight I just got tired of trying to see what speed I was going in the dark. It appears that the last of my dash bulbs finally burnt out....Time to R&R the Instrument cluster. Pulled the cluster, fixing the trip odometer while I was at it...Everything looked good. Put it back in and even though now all my gauges work without pressing on the upper left corner of the IP (instrument panel) I have a new and strange problem. When I put on high beams my tach shows 0 and all the other gauges peg out at their high points....Could I have pulled a ground loose or something when I was trying to get everything unplugged???? May have to pull the cluster in better daylight so I can see everything more clear...Any ideas? Or has anybody seen this before?? Are the bulbs for the seat belts and glow plugs hard to find?? They look like real small bulbs. I was lucky in that the one in my shift lever was just loose...