fuel gauge problems

""Then I ohm the sending unit and it is pretty much ground out as it sits. ""
Ohm meter doesn't say "pretty much dround out" , not one that I've seen anyway.
Ohm reading at the sender should be somewhere between 10 ohms and 73 ohms per how much fuel is in the tank. Sender wire should show the same behind the cluster also. If not that current path is flawed.

""I do have a electronic resistor that is installed and is suppose to shut down if too much power is going to the cluster."" I'm totally buffaloed by that statement. You may have created your problem there.

Temp sender wire is purple.

Good luck with it