nothing worked on my old cluster so i found one on a vehicle that was wrecked and was working when it was wrecked, when i put it in my truck the odomenter read all nines and none of the gauges worked. I changed the alternator to a one wire alternator high output and we have not had any other problems with charging system. That way it doesnt have to go through instrument cluster. but i cant figure out how to reset the 9999 code on the speedomater I think that makes all the other gauges work.