[19Fordy]

Not sure I understand what you mean when you say "guage reads a
reduced variable voltage from the sender."
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Does that mean that the guage provides accurate readings as to how much fuel is left in the tank same as it did when using the OEM fuel tank sending unit?
OR
Does the gauge give a reading that is not a direct real time accurate reading but, is instead and "indicator" reading of fuel left in the tank? For instance, the needle on the gauge shows 1/2 but that means the tank is really 3/4 full? Or the gauge needle reads 1/4 but that really means the tank is empty? Thanks.