There is a wire ground on the middle screw of the dash cluster cover. A lot of times it's not been put back when the covers been off or the srews not tight. Also check ALL your grounds. I spent three days cahsing a similar problem. Good luck Pete
67 red camaro convertible, 78 silver anniversary vette, 1976 kz900, 1985 Z28 camaro, 1971 chevelle. Too many toys now My four car garage is no longer big enough.