Mustang Instruments Tech Vintage Oil Pressure Senders
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Vintage Mustang oil pressure senders look like this. On the left is the larger sending unit for gauge use. The smaller unit on the right is for warning lights. The larger sender is a variable resistor, which varies gauge reading depending on oil pressure. The smaller unit is a simple on/off switch, which closes (oil light comes on) at 3 to 7.5 psi oil pressure. View Related Article
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