Question about 1983 Toyota Land Cruiser

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Main fuel gauge

I have an 80 series diesel with standard fuel tanks.
The gauge of the main tank stays on half full permanantly. This is the case if the tank is full or completly dry.
On the rare occasion, it will work on corragated roads etc.
Could someone please shed some light on whether this could be a bad earth or sticking float?

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The sensors on the float go bad its on your fuel pump youd have to replace the whole unit

Posted on Oct 04, 2008


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It has to be the sender unit in the tank, or the gauge in the dash, or the wiring between them. In most cases, it is the sending unit-they are quite fragile often. Usually best to replace them (not very expensive-just difficult to get to.) The sending unit will be located with the fuel pump inside the tank. They are removed as one single unit.
There is a way to test if the dash gauge itself is working properly. You have to find the wire going into the fuel tank that is from the gauge, then with key on, ground that wire to the frame-you can use a jumper wire into the fuel tank electrical connector. When the wire is grounded, the gauge will definitely move to one place (either half full, or full-but it moves and stays there). If you see that, you know the sending unit in the gas tank is bad. Do not ground that wire for more than a couple of seconds, it is lo0w voltage, but it may cause a shorting problem.

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