Temp and petrol gauges
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Lurker
Vespa Gts 300
Joined: 24 Sep 2020
Posts: 3
Location: Scotland
Thu Sep 24, 2020 3:05 am quote
Seem to be having a problem with both gauges on my gts 300 , on start up the petrol gauge always registers full and the temp gauge goes off the scale . I have tried another speedometer and it does the same , also checked all connections etc anybody else have this problem and no of a fix ?
Ossessionato
2016 Vespa GTS300ie abs/asr/ess Settantesimo '70'
Joined: 11 Jun 2011
Posts: 3310
Location: East Anglia, a dryer region of the UK than Israel
Sun Sep 27, 2020 1:14 am quote
Hi and welcome to the site.

This is a short somewhere in the speedo head or wiring leading to the head. It's difficult to be more precise than that at the moment. If you are unable to fix this yourself then I'd take it to a dealer. It can get complicated in knowing what to check. I take it you have checked wiring plugs to the speedo head to make sure they are tight and undamaged?
Veni, Vidi, Posti
In garage: Yamaha Tricity 155 Urban 2019 - MV Agusta 125 RS 1956
Joined: 21 Jul 2007
Posts: 5641
Location: Latina (Italy)
Sun Sep 27, 2020 1:24 am quote
ECU...it controls everything ... the seller has a pc that checks and eventually makes a reset, maybe that's the problem.
Welcome to MV from Latina, Italy,
Long live Scotland!
Lurker
Vespa Gts 300
Joined: 24 Sep 2020
Posts: 3
Location: Scotland
Mon Sep 28, 2020 7:52 am quote
No Iíve not got it fixed yet but Iíve done the obvious stuff , connections, different speedo etc and itís still the same



Lurker
Vespa Gts 300
Joined: 24 Sep 2020
Posts: 3
Location: Scotland
Mon Sep 28, 2020 7:53 am quote
When started



Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: 26 Aug 2007
Posts: 39542
Location: Pleasant Hill, CA
Mon Sep 28, 2020 8:04 am quote
There's definitely a ground problem somewhere. I'd be checking the engine case to battery -ve first (very quick and easy), then the ground connection to the dashboard (a bit of a PITA to get to).

The ECU has nothing to do with the temperature gauge or fuel gauge, so you can rule that out.
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