Gas Gauge just Quit.......????

You should have a ground strap that hooks one end to the metal outlet tube from the sending unit and the other end to the metal fuel line supplying the pump. Basically, it skips over the short segment of rubber fuel line that connects the two.

Disconnect the single wire on the sending unit's terminal. Connect an ohm meter to the terminal and ground. Depending upon how much gas is in the tank, you should get a reading. Sorry, I don't remember the range you should expect from full to empty. Someone else here can provide that info, or I've seen it posted over at slantsix.org before. The sending unit is basically a variable rheostat, providing more or less resistance with the changing level of fuel in the tank. Being a new one, I doubt the problem is there.

Sounds like you maybe lost continuity in your wire somewhere between the sending unit and the instrument cluster. Use some long wire leads to check continuity in the sending unit wire. If everything else in the cluster is working properly, it doesn't seem likely that it's a problem with the voltage limiter. As a last resort, you might need to pull the cluster to get at the guage and check it for proper function.

Good luck. I hate electrical problems.
Jerry