the signal wire runs from the left side pin in the sender when looking at the back of it's plug with the key at the top. If you've got power and ground to the other two pins at the sensor already then you only need to get the signal wire up to the cluster. In a series 2 MX83 it's pin 4 in the white 16-pin plug behind the glovebox that connects to the flying lead of the dash loom, yellow wire. In a JZX81 engine loom they're it's in the same plug/position.
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