Recovry4x4

Start with page 2-120 or the PDF page 206 from TM 9-2320-361-20. It goes through the truobleshooting of all the instruments there. You should have has 28 volts or battery voltage at wire 28 where it is disconnnected from the sending unit. If you don't have 28V there the gauge or wire is screwed up. Rig a test wire from 28 terminal on the gauge to the tank sending unit and try that. Might just be a problem with that wire. Also take that test wire and run it to a known good ground. Gauge should read full (pegged) as long as that wire is NOT grounded. When that test wire is grounded, that tank should read empty.

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