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Fuel gauge reading too high

Posted: Fri Jan 01, 2021 12:18 pm
by timberman2004
Ahhhh Sainted electrical wizards, any answers please ...

mucking about trying to get the speedo back into place I think I shorted out the voltage stabiliser, or it just chose that moment to fail

got a replacement 2nd hand one and the Smiths No matched, easy replacement.
now my fuel gauge goes very hard to the right when full, and reading just below 1/2 way, i run out of fuel

any tips so i can get the gauge to read correctly ?

Re: Fuel gauge reading too high

Posted: Fri Jan 01, 2021 2:45 pm
by oliver90owner
Check the voltage and replace if not to specification.

Re: Fuel gauge reading too high

Posted: Fri Jan 01, 2021 2:46 pm
by Sleeper
Do you have a multimeter or Voltmeter ?
Check the output of the voltage stabiliser.... 10V.

John ;-)

Re: Fuel gauge reading too high

Posted: Sat Jan 02, 2021 8:24 am
by timberman2004
thanks chaps, ...shall do and report back

Re: Fuel gauge reading too high

Posted: Sun Jan 03, 2021 7:41 am
by timberman2004
sorry to appear thick,
got a multimeter and the speedo unit is out to test,...but which connections should i test across on the voltage stabiliser for the 10 V reading ?

Re: Fuel gauge reading too high

Posted: Sun Jan 03, 2021 11:52 am
by Sleeper
Check out this...

https://www.minimania.com/Smiths_Voltage_Stabilizers

if you've taken the speedo out , you'll have to earth it.

B Battery 12volt ( ish )
I Instrument ( s ) 10 Volts
E (or case ) Earth

John ;-)

Re: Fuel gauge reading too high

Posted: Mon Jan 04, 2021 7:45 am
by timberman2004
thank you John,

a most helpful and useful article
I'm not an electrician or electronics engineer, my skills lie elsewhere, so a step by step guide is great

Neal