At 03:32 PM 7/8/2003 -0400, Dave wrote:

> >Your basic assumption is correct. But one side of the meter is hot and the
>other side of the meter goes to ground through the varying resistance of the
>sending unit. Usually most meters are calibrated to a particular sending units
>resistance since the overall resistance value of the sending units
>potentiometer
>will vary according to each manufacturer.

OK, that may be a problem, with the calibration.  There may be some sort of
adjustment on the meter for that -- will have to check.

> >if you hook up an ohmmeter to the lead coming from the sending unit you
>should see the resistance vary as the float is raised and lowered.

Well, it would be kind of hard to vary the float level, since it is sealed
inside the fuel tank.  I think that the suggestion by Lee Jones to
substitute a wire to ground with a pot in series would probably be the
easiest way to check it out.

At any rate, now that I know that my basic assumptions on how it functions
were pretty much on target, with some minor adjustments in what goes where,
I think that I can probably proceed from there.  Thanks, guys!!

John

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