Quote:
Originally Posted by Striper80
You can test very easily with a multimeter set to the ohm scale. If you connect the leads to the two sender connections and raise the float. The resistance should change corresponding to the position of the float arm. The sending unit is basically just a variable resistor.
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I connected an ohmmeter to the sender units before I installed them inside the tanks. I see the resistance changing as I lift the float. My question regards calibration. If I connect a meter in series with the sender, and 12v to the sender, how will I set the meter to read zero when the tank is empty and full with the tank is full? I don't see a rheostat or other way to calibrate the system...
Larry