3vze Gauge Cluster Problems

I have a 94 Toyota with th3 3.0 3vze 6cyl. My gauge cluster is giving me all sorts of problems. My fuel gauge is stuck on full and when ever I move the float on the fuel sending unit the temp gauge jumps then will eventually peg out. I've purchased another gauge cluster form the junk yard thinking it was the cluster but its still giving me the same problem. Any advice on what my problem could be?

 

Sounds like you may have a ground problem, I'd start by checking powers and grounds at the cluster.

 

Ended up running a ground wire from the back of the cluster to a chassis ground. Everything in working order now.