10 to 80 Ohms
On my Town Landau I also replaced the sender (the one with the Low Fuel indicator). The variable resistor on the sender varies from 10-80 Ohms depending on the position of the wiper. 10 Ohms would mean maximum current and full tank (maximum meter deflection). 80 would mean minimum current and empty tank (minimum meter deflection). Make sure your sender reads from 10-80 (use a resistance meter - a DMM) so you know you have the correct one. Also, it may be possibly that you are plugging the connector on rotated so the corrected terminals are not contacting the correct sensors in the sender. I am not sure that is possibly but when I was under my car it was a bit of a pain to see the correct orientation of the three female terminals in the black boot. Do what Harley said, ground the meter to get full deflection - this is a good test. You can do this in the trunk by unplugging the harness.
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