2MT,

You missed the part where the dash gauge works when connected to the sending unit outside the tank with key on. Arm goes up and down and immediately registers on the dash gauge.

Once installed in the tank and connected to the same two wires as before, gauge stays at empty with key on.

1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)