Seems like someone has a case of the 87-91 SSE cluster BS. The best you can do, is pull the dash pad, and clean all the contacts for your cluster. If that doesn't work... i think I may need to dig the dust off my cluster work.. there is something in the compass that prevents both compass and DIC from operating.. When you pull the cluster, pull the compass out, and see if you can find any cracks in some electrical components, or burned stuff.. etc. I can pull my cluster in under 5 minutes [i've also done it a million times].. so it isn't a huge deal.. so don't worry about that. Take some pics if you can..
'89 SSE - GX3 -190k, 155k on body - Back for another ride.