[mockingbird812]

On the under side of the post I noticed the retaining nut was corroded. This nut (1st photo - green arrow) is responsible for making the connection between the post and the conduit (2nd photo - blue arrow) that connects to the float mechanism that measures resistance based on the float position. i disassembled it and found that there did not appear to be a good connection with the conduit that connects to the float mechanism. I cleaned up all metal contacts at this junction and made a new rubber gasket (2nd photo - green arrow) to electrically isolate the post from the sender frame. The old gasket was deformed and too thin (2nd photo - red arrow). Once this was done the connections worked just by touching the multimeter probes to the sender post and the ground wire. I am hoping this has fixed my problem. I’ll hook the sending unit up to the gauge lead tommorow before reassembley to ensure the sender is sending a good signal to the gauge.