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Re: fuel gauge questions

To: "Bryan Vandiver" <Bryan.Vandiver@Eng.Sun.COM>
Subject: Re: fuel gauge questions
From: "Wiedemeyer" <boxweed@thebest.net>
Date: Tue, 10 Aug 1999 23:12:26 -0400
Cc: "spridgets list" <spridgets@autox.team.net>
Reply-to: "Wiedemeyer" <boxweed@thebest.net>
Sender: owner-spridgets@autox.team.net

First, nothing should be grounded to the fuel gauge case.  Second, your
gauge is a thermostatic type, which means that as the current passes through
the insulated coil, the coil heats up, which causes a bimetal strip that
should be either running through the center of the coil or somewhere near
the coil (but not necessarily touching the coil) to heat up also.  This
bimetal strip is attached to the needle.  As one side of this bimetal piece
heats up faster than the other side, it bends, which causes the needle to
move, indicating the amount of fuel.  The path of the current should be from
the battery to the "B" terminal, then to the first (left) coil, (which is
simply a resistor to reduce the voltage) then to the heating (right)coil,
and finally to the "T" terminal.  So, one end of the wire on the left coil
should be attached to the "B" terminal, and the other end should be attached
to the right coil.  The other end of the insulated right coil should be
attached to the "T" terminal.  The needle itself should not be attached to
any wires.  Hope this helps.

-----Original Message-----
From: Bryan Vandiver <Bryan.Vandiver@Eng.Sun.COM>
To: boxweed@thebest.net <boxweed@thebest.net>
Date: Tuesday, August 10, 1999 2:40 PM
Subject: Re: fuel gauge questions

>The back of my gauge is marked  B and T.
>As far as the series connection goes..
>Is the left coil 'grounded to the case through it's screw mounting??, or
>each coil have a wire soldered to each side of the needle assembly?
>Looking at the inside of the gauge from the front, it appears the left coil
>only one (1) wire coming off it (should there be two?)
>If there is only one wire, I assume this should be soldered to the point on
>of the right coil, and the 'wire comming off the insulated tab on the right
>is soldered to the point on the rt side of the needle assembly??
>I'll try doing a primative diagram:
>  | needle |
>  ----------
>   \      /
>   O------O
>   OR
>   | needle |
>   ----------
>           /
>>To: "Bryan Vandiver" <Bryan.Vandiver@eng.sun.com>
>>Cc: "spridgets list" <spridgets@autox.team.net>
>>Subject: Re: fuel gauge questions
>>MIME-Version: 1.0
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>>If the two terminals on the back of the fuel gauge are marked with a "B"
>>battery, and a "T" for tank, then the two coils should be attached to each
>>other in series.  If there are no markings on the terminals on the back of
>>the fuel gauge, then the two coils should be connected in parallel.
>>-----Original Message-----
>>From: Bryan Vandiver <Bryan.Vandiver@Eng.Sun.COM>
>>To: spridgets@autox.team.net <spridgets@autox.team.net>
>>Date: Monday, August 09, 1999 6:43 PM
>>Subject: fuel gauge questions
>>>Hello everyone,
>>>Does anyone have information on the internal wiring of the bugeye fuel
>>>My Gauge wasn't working at all, so I thought I'd open it up to find out
>>>There are two small 'coils' locate on either side of the needle assembly
>>>the gauge, but the 'hair fine' wires that were soldered to the needle
>>>have been broken off. Apparently a previous owner had unscrewed the coil
>>>assmblies from the back of the case, and in the process the coils
>>>breaking off the wires. the coils still look OK, and it looks like a
>>>matter to resolder them, unfortunately I can tell which wire goes where.
>>>assume the two coils were attached to each other, but all I see is two
>>>Any ideas???

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