The fuel gauges used in our Spridgets are a type of D'Arsonval meter that
simply measures changes in current. The sending unit is simply a variable
resistor that passes differing amounts of current based on the level of the
gas in the tank. Reversing the wiring won't hurt either the gauge or the
sending unit. Early and late sending units are reversed for full and empty
conditions and the gauge won't work correctly if you wire it backwards or
use the wrong sending unit.
I think your sending unit is bad Phil.
Rick
'59 & '61 Sprites
----- Original Message -----
From "Nase" <nase at ptd.net>
Subject: fuel gauge/sender
> I hear that later v earlier senders are different in that the resistance
on
> the sender is reversed for full and empty conditions. If a newer gauge
and
> an older sender are used wouldn't this just reverse the indication on the
> gauge or will it ruin the sender or gauge?
> I also have a negative ground bugeye should the wires on the gauge then be
> reversed?
> The PO had the wires reversed and I was getting no activity on the gauge
at
> all. I then switched the wires and get an always full indicated.
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