I was thinking I could be a little bit more helpful.

For the grounding issue - remove the two plastic bezels under the steering column, remove the 3 bolts in the steering column support bracket under the dash and drop the steering column down and let it hang. Remove the 5 black Phillips screws in the plastic instrument bezel and gently work it back from the dash. With an inch or two of clearance at the top, you should see a thin steel wire with a loop on the end that goes over the metal tab the center bezel screw threads into. Make sure that loop and wire is present, clean up the threads on the screw and metal tab, and put it back together making absolutely sure the center screw goes through the metal loop and into the dashboard tab.

If that does not work or the metal loop/wire is missing or out of place, you will have to disconnect the speedo cable and the wiring harness connector into the instrument cluster from below/behind and pull the cluster.