Removed my fuel sender and noticed the open circuit is not in the rheostate element but bad connection between the float arm / wiper and the body of the sender.
So if you have a flaky sender check the resistance between the body and the float arm. Should be close to zero. If not, perhaps solder a small flexible lead to the wiper arm and run it up a mounting hole and around a screw. Or tap a small screw into the body of the sender.
Between arm and body

Between terminal of rheostat and arm
So if you have a flaky sender check the resistance between the body and the float arm. Should be close to zero. If not, perhaps solder a small flexible lead to the wiper arm and run it up a mounting hole and around a screw. Or tap a small screw into the body of the sender.
Between arm and body
Between terminal of rheostat and arm
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