Have you checked the sender unit?
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Hook up an ohmmeter and you should get a steady increase/decrease in your reading depending on what way you move the float-arm


There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!