I just replaced the rheostat last night, its a 5 minute job to just change out the rheostat. Mine was toast so in went the new. I took a little longer and removed the instrument cluster and took a burnishing tool and cleaned all the electrical contact posts that are sticking out from behind the cluster. I then applied a light coat of dialectric grease to them and re-installed the cluster. Now my lights work great and my fuel gauge is rock solid. I had a bouncing fuel gauge and replaced the fuel sender since it was shot, the gauge would still bounce once in a while so I reached up under the dash and wiggled the plug and the gauge would jump as I wiggled. After cleaning the contacts on the plug and plugging it back in its now working like new. Something to think about cleaning while your in there.

Hodakaguy