A fuel gauge on a tractor works the same as an automotive fuel gauge. The most important thing to remember is that the gauge and the sending unit must be a matched pair. For example, a Chevy gauge and the sending unit are both operating in the zero- to 90-ohm range. There are several different gauges and sending units so, unless both are being replaced, the operation range must be found for a proper indication.
Turn the ignition switch on. Touch the negative lead on the voltmeter to a good ground and touch each side of the fuses with the positive lead of the voltmeter to check for blown fuses. Replace any fuse that does not show power on both sides of the fuse.
Check for 12 volts to the rear of the fuel gauge on the terminal marked BAT+ by touching the positive lead of the voltmeter to,…