65 Barracuda gauge problems

I did buy the regulator off ebay. Used 12v test light on the vreg when plugged into back of cluster and didnt get a light on test light. I did this assuming 12v would have to pass through vreg and 5v would come out. Is there gonna be a 2nd vreg inside the gas gauge? I replace what i thought was the vreg on the back of the cluster. I also have the cluster grounded to the steering column mount, this is the way it was grounded when I took it apart. The cluster was never dangling from the harness. It was supported on the column and was tested mounted on dash afer limiter installation. I saved some front and back ppictures of a cluster for sale on ebay, and forgive me if the owner of that cluster is a member here. I simply used the pictures as reference. I need all the help I can get. The cluster in these photos is identical to mine. The only difference I see is that this cluster has a grounded condensor(kinda like the kind you see with ignition points) wired to the limiter. Mine doesnt have the condensor or is missing it, and this could be the very culprit keeping my gauges from working. Thank you to everyone here. This is very frustrating!