New cluster did not fix the dead Gauge issues HELP

ok round 2 for the 66 dodge dart
Engine rebuilt and is now running. I had replaced the cluster board with a new one from eBay. Also replaced the Voltage Limiter with a new one from Amazon. Turn indicators inside the dash are now flashing. But gas and temp are no go.
I had tested both gauges when i removed the cluster, with some D batteries and I got the gauges to move properly, so I think they are working. But nothing happens when I put them into the car.

I have also tested that I am getting fluctuating current at the temp sensor on the engine itself, and I am.

I assume that if the light indicators are flashing with my blinkers, then the cluster is grounded, correct? Or is it possible for the gauges to not be grounded, while the blinker indicators are working?

Also not working is any cluster illumination. I have replaced all bulbs.

I would really appreciate some step by step things I can do to get this new cluster to work properly. Fuses look good, and I have even replaced them. How can i determine I am geting power to the cluster ? also note: ammeter has been disconnected/bypassed. I am leaving that as is.

thanks guys.