You need a multi-meter that can read resistance. Basically, you are checking to see how much power loss there is when you run power directly through the sensor. Based on different temps, that loss will change. The loss is known as resistance. Basically, if you put 12v into a sensor and only 10v come out, there is a certain level of resistance in the sensor.
Tuesday, February 3rd, 2015 AT 5:06 AM