"Tom & Diane Kubler (Kraftwerks)" wrote:
> Jack
> My experience with three terminal senders are that they are for cars
> equipped with low fuel warning lights. Apply power to one terminal; measure
> the voltage out of the other two. If the tank is empty or nearly so, one
> terminal will read full voltage while the other much less (generally 2-3 V).
> The full voltage terminal is for the idiot light. The low voltage terminal
> is to the gauge and the terminal you applied power to goes to a constant
> voltage regular or other power lead. BUT WAIT! you would get the same
> result if you have power applied to the idiot light terminal. SO RETEST
> with the sender in a half tank or fuller condition. If you have no power at
> the idiot light terminal nor at the gage terminal you've got the idiot light
> and power terminals reversed.
>
> Why don't these kind of senders cause the tanks to blow?
>
> Tom Kubler
>
> ----- Original Message -----
> From: "Jack W. Drews" <vinttr4@geneseo.net>
> To: <vintage-race@autox.team.net>
> Sent: Thursday, June 01, 2000 8:24 PM
> Subject: fuel gauge help needed
>
> > We are trying to drive a two terminal 1960's vintage fuel level gauge
> > with a three terminal sender in our new Fuel Safe cell. So far, we think
> > we've tried every possible hookup, with zero results.
> >
> > We think the gauge is operable, because when we apply twelve volts, it
> > reads full, and six volts will make it read half full. However, we
> > haven't figured out how to get a varying voltage from the sender to
> > apply to the gauge.
> >
> > Has anyone else actually gone through this?
> >
> > --
> >
> > TR6 -- 29 and still running
> > TR4 -- 39 and still racing
> > uncle jack -- still learning
> >
> >
Thanks -- what I've found out so far is that the sender operates on current
variation, not voltage variation, and that a Fuel Safe gauge is needed. Thanks
to all who tried to help.
--
TR6 -- 29 and still running
TR4 -- 39 and still racing
uncle jack -- yeeehaaa
|