I finally found a postive grounded gas gauge from a&i, It says 12v on it. I used a circuit tester on it (2-AA batteries, 3 volts), my fuel sender is 30-250ohms, when the sender is at it's highest resistance using the 3 volts, the gauge reads empty and then reads full with 30ohms resistance. it reads full all the time in both with the 12 volt tractor battery. But, the gauge only works in both cases , when the ground is negative. U.K.mf 35 tractors were 12 postive grounded, why is my U.S. tractor postive grounded when the rest are negative? It's a pain in the butt! I'm trying to get my supplier to replace the gauge, it's got to be deffective!
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