Disappearing Fuel Level

Sender is a 0-73ohm unit, should be fine.

Update: Circled wire with the ring terminal on the back of the cluster has no continuity to ground. That means I wasnt getting a ground until the cluster was installed in the dash. When checking that continuity with a jumper wire to establish the ground, the meter beeped for continuity with a rhythmic 1 sec on/off (ground/no ground). When connected to the gas gauge pin, it blinks between 35ohms and OL with the same rhythm.