Fuel gauge reading too high

Discuss mechanical problems here.
Forum rules
By using this site, you agree to our rules. Please see: Terms of Use
Post Reply
timberman2004
Minor Friendly
Posts: 21
Joined: Thu Mar 19, 2015 7:54 am
MMOC Member: Yes

Fuel gauge reading too high

Post 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 ?
oliver90owner
Minor Legend
Posts: 1662
Joined: Thu May 12, 2016 6:33 am
MMOC Member: No

Re: Fuel gauge reading too high

Post by oliver90owner »

Check the voltage and replace if not to specification.
Sleeper
Minor Legend
Posts: 1049
Joined: Tue Nov 08, 2016 3:18 pm
Location: Manchester ( Damp and Miserable ) and that's just the wife...
MMOC Member: Yes

Re: Fuel gauge reading too high

Post by Sleeper »

Do you have a multimeter or Voltmeter ?
Check the output of the voltage stabiliser.... 10V.

John ;-)
timberman2004
Minor Friendly
Posts: 21
Joined: Thu Mar 19, 2015 7:54 am
MMOC Member: Yes

Re: Fuel gauge reading too high

Post by timberman2004 »

thanks chaps, ...shall do and report back
timberman2004
Minor Friendly
Posts: 21
Joined: Thu Mar 19, 2015 7:54 am
MMOC Member: Yes

Re: Fuel gauge reading too high

Post 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 ?
Sleeper
Minor Legend
Posts: 1049
Joined: Tue Nov 08, 2016 3:18 pm
Location: Manchester ( Damp and Miserable ) and that's just the wife...
MMOC Member: Yes

Re: Fuel gauge reading too high

Post 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 ;-)
timberman2004
Minor Friendly
Posts: 21
Joined: Thu Mar 19, 2015 7:54 am
MMOC Member: Yes

Re: Fuel gauge reading too high

Post 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
Post Reply