I have my round gauge cluster completed. It is not in the car. I can get the gauge lights to come on to clock, speedo and tach. This is using a ground to the metal case and a positive to 12V. This is at #2 Gray wire on the connector. I can't get the fuel,temp and amp lights to come on through that gray wire. The socket and bulbs are all new and if I jump those in question they do come on. These gauges are OEM and have always been in my Monte. And no I did not use LEDS. I keep looking at our traffic lights and seeing so many are blown out. I just don't trust them.