If the needle has moved further from the original starting point, this means that the gauge is working properly. Wait a few minutes, then take another reading. Now, take the temperature gauge outside and place it in direct sunlight. If the needle on the gauge moves, make a note of how far it shifts from the original reading. Write down this number or remember it mentally. Start by taking a reading of the gauge when it is at room temperature. Now that you have your multimeter set up and know how to take readings, you can begin testing the temperature gauge. Make sure that there is no electricity running through the sensor, as it could damage it. To test whether or not the dip sensor is working, place the probes of the multimeter on either side of it. Make sure to attach the leads of your multimeter to the correct terminals on the back of the gauge. You’ll want to measure the voltage at the gauge’s terminals while the engine is running. Start by taking measurements with your multimeter. Place one lead on each of the sensor’s terminals. Disconnect the sensor and remove it from the engine. You will find it on the side of the engine, usually near the thermostat housing. Once you have found it, you will need to remove it from its location. It may be located under the hood or near the radiator. In most cases, it will be a small black box somewhere on the engine. The first thing you need to do is find the temperature sensor. In order to test a temperature sensor with a multimeter, you need to be able to measure resistance. This means that they have a certain resistance at a given temperature, which changes as the temperature changes. Most temperature sensors use resistance to measure temperature. How to Test a Temperature Sensor with a Multimeter ? Use extreme caution when using one and never use it to test live electrical circuits.
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