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When the front gas tank is unhook out of a ford 150 how could the gas meter still be reading full?
Shorty9lives
Gas gauges work based on electrical resistance. When the float in the tank is moved up or down by the fuel level, it changes the resistance and the gauge reads differently. Some gauges read full if resistance is high and full is resistance is low.
If I understood the question, you unhooked the gauge and it is reading full, that is because you have opened the electrical contacts to unlimited resistance. But, if the gauge was always reading full, before you disconnected it, and that was the root of your problem, then the wire could be shorted to chassis ground and the gauge is reading the resistance of the entire truck.
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∙ 14y ago
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