In order of diagnosing. 1st 1968 FB conv. New tank, sender, fuel lines, harness. With fuel tank in place, fuel in tank up to 10 gallons guage reads E. Removed fuel, dropped tank with ground intact, sender still in tank manually moved float guage works. removed sender placed in large container of gas float works and guage works. Put tank back in place, same ground etc. Guage reads E. Can anyone help me, I'm out of ideas ?? Chris