Sub tank gauge - always showing empty when full, worked again - then stopped (1 Viewer)

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Joined
Jul 31, 2022
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3
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183
Location
Brisbane AUS
Hi team,

The sub gauge on my LX470 has never worked while I've owned it. Main gauge works fine. The closest I got to an answer was a thread in LCool about Toyota Australia doing full cluster replacements. Tried 1 hour no battery, pulling the fuses dealing with the fuel system, etc etc - no luck.

I just put up with it.

However - after getting a rear wire run so my rear camera would work with the shiny new T'eyes CC3, my main tank was running low so I switched to the sub tank and voilá - the gauge worked!

But alas - when I restarted the car it was back to empty and flashing orange light - there's a NZ and Australian term for that... I have a feeling the installer may have (temporarily) resolved a wiring or connection issue.

Question - where does the main/sub tank wiring run, and if possible a diagram :)

TIA
 

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