[Spridgets] Fuel Gauge and Float Check

[Dean Hedin]

Be very careful is you decide to dissasemble the guage.

If you have the skillz it's possible to setup the sender and guage 
on the bench with a power supply and tune it to optimal.

But it's very touchy and you can easily break some tiny wires inside
simply by turning screws on the back of the unit. 

----- Original Message ----- 
From: "Chris Manuel" <cmanuel at wi.rr.com>
To: <spridgets at autox.team.net>
Sent: Sunday, November 15, 2009 8:57 PM
Subject: Re: [Spridgets] Fuel Gauge and Float Check


> Can a broken sender "kind of" work, or is it all or nothing?  Mine is either
> full (when full) and then drops to about 1/3 and acts normally I think.
> 
> Chris
> 
> -----Original Message-----
> From: spridgets-bounces at autox.team.net
> [mailto:spridgets-bounces at autox.team.net] On Behalf Of Frank
> Sent: Sunday, November 15, 2009 7:27 PM
> To: Hotmail
> Cc: spridgets at autox.team.net
> Subject: Re: [Spridgets] Fuel Gauge and Float Check
> 
> Hotmail wrote:
>> Hello Group.
>>
>>  
>>
>> I have recently purchased a '73 Midget with a broken fuel gauge. As a
> winter
>> project I would like to "fix" it. How do I "test" the circuit - gauge and
>> float outside the car? Having 2 of each I check continuity with an Ohm
> meter
>> and the reading was full scale.  I than hooked up one pole of the fuel
> gauge
>> to the Bat + the second to the + pole on the float and second to ground. I
>> do not get any reading on the gauge when I move the lever on the float.
> What
>> am I doing wrong? 
>>   
> I check them with a 12v DC power supply on the work bench.
> 12v + to the "B" terminal of the gauge,  12v- to the body of the gauge 
> (ground)
> Also 12v- to the body of the sender and a wire from the terminal of the 
> sender to the "T" post on the gauge.
> Now slowly move the float up and down and watch the gauge.
> 99 out of 100 times, it's a bad sender.
> The 73 does have a voltage stabilizer in line from the battery to the 
> gauge, you do not need this to bench test the set up but the readings 
> will be off a little without it.
> If you get an empty reading on the bench with the float down, and a full 
> reading with it up, it's good.
> 
> 
> -- 
> Frank Clarici
> Toms River, NJ
> My own Fleet of Sprites
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