Fuel Gauge

[Kimdeg123]

Currently having problems with my fuel gauge on my 1994 samurai 413. I have dropped the tank and run a new wire straight from the back of the gauge and another wire straight from the negative terminal of the battery, because the original wiring was cut/missing when bought.

When I dropped the tank, looking at the top of the sender it had three terminals, by connecting my live and neutral through power of deduction I managed to get the gauge working but this is only when the tank is dropped, as soon as I put it back up the gauge is either full or off gauge empty. Just wondering whether the third terminal is required or if I just need a new fuel sender unit?

Any help/recommendations will be greatly appreciated. Thanks in advance.

[SherwoodNash]

From distant memory when I did my SJ410 fuel tank replacement, l believe that one of the wires goes to the dash low fuel warning light?

I remember because my SJ410 doesn't have this feature.

Someone with a SJ413 will soon chime in, good luck