70 Cutlass Supreme Convertible: My fuel gage reads all th way to the right… Past full. Before pulling the tank to evaluate the sending unit, I’d like to check the fuel gag in the dash. I have a RJ Cluster 6492962. It has wires for the gen, oil, fuel and brake attached to a harness. Can I just pry the harness off the RJ Cluster? And which wires control the fuel gage? And how do I go about testing? Thanks for any consideration. Clif

 

a common issue is the loss of ground.

See https://classicoldsmobile.com/forums...upreme-155053/