Ok so Im working on a dash for a garden tractor for a guy and it had a bunch of cracked solder joints on the pins of the connector. I fixed them and need to be able to power it up and calibrate the needles for the two gauges on it. They are only 3 pins on the gauge motors. My question is how do these motors function? Do they run off a variable voltage or is it a signal. Thanks if anyone could help. I will attach a couple photos of the board front and back.
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