I have,a 1971,340 demon having, a,problem gas gauge temp gauge keep on going up and down replaced and checked everything were is,voltage limiter location on rally gauges and would that cause this,problem THANK You

 

 

Check all connections at the dash, fire wall and all the grounds also look for exposed wires. I suspect a connection or ground/ grounds.

 

 

Does not have a separate limiter does,temp gauge have limiter built in temp and fuel gauge goes up and comes down has 5 volts like it should to fuel gauge

 

Pull the cluster and test it on the bench.... If that turns out good.... You hooked something up and are sharing the same common wire.... You just going to have to chas it, the way I read it...