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10-21-2023, 04:08 AM
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#13 |
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Senior Member
  
Join Date: Jan 2005
Location: CA
Posts: 7,022
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Re: Mystery Gauge
Some reproduction gauges are designed to operate without the stock external resistor. The external resistor on a stock temperature gauge sets the voltage applied to the winding that pushes the gauge toward cold. The sender controls the voltage to the other winding that pushes the needle toward hot. If your reproduction gauge has the resistor built into it internally, then adding an external resistor will decrease the total resistance between the cold winding and ground, which will increase the voltage applied to the cold winding and will make the gauge read cold. Adding resistors in parallel decreases the overall resistance. Try running your reproduction gauge without the external resistor.
Last edited by pjmoreland; 10-21-2023 at 04:15 AM. |
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