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Old 10-14-2020, 09:52 PM   #1
IndianapolisRacer
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Default 1941 ford pickup oil pressure

My 1941 Ford pickup was converted to 12 volts , all instruments work except oil pressure gage which is disconnected at engine sending unit . I assume it needs some sort of voltage drop for the gage to work , where do I get a voltage drop unit so this oil pressure gage will work ?
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Old 10-14-2020, 10:02 PM   #2
JSeery
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Default Re: 1941 ford pickup oil pressure

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The voltage drop is required for the input power to the gauge (the battery connection to the gauge). You can have one voltage drop for all of the gauges or an individual voltage drop for each gauge. The sensor (or sending unit) is a ground path for the gauge. The early Fords used a current pulse system that varied the current flow through both the gauge and the sensor. Modern gauges and senders use varing resistance to accomplish this.
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