73 Dodge Dart Sport Fuel Gauge Wiring

The wirring harness to the rear of the car is difficult to access and or test. You need to check the simple sht and forget ohm testing that wire end to end. Find it in the trunk and connected to the sender. Check the sender for chassis ground. Finally pull the left front kick panel and check the wiring there.
The resistance in the gauge , isoluated on the workbench is 20 ohms but I dont have aclue what it might read installed . The other side of the gauge is connected to a voltage limiter with bouncing mechanical points inside.