[TBONE1964]

I am using a new AC Delco fuel gauge and a GM 0-90 ohm sending unit.

These photos show how the gauge is wired to the sender and I use a 10 amp batt charger for power.

The ground can be shared between the sender and the gauge.

I use a yellow jumper as the "tan" wire that runs from sender to fuse panel and then to cluster.

I use green lead from my batt charger for the pink power wire from the ignition switch through the fuse panel and to the circuit board in location number 3 on the connector.

It is really this simple. If you can do this, you can test your fuel gauge out of the cluster.