✔ How To Check If A Resistor Is Good

How To Check If A Resistor Is Good

- May 01, 2018

If it is very far or much different than its rated value then the thermistor is faulty and should be discarded. An attempt to measure a resistor.

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Next obtain an electrical meter capable of measuring resistance.

How to check if a resistor is good. Test a resistor with an ohmmeter. Locate the fuse for the blower motor in the ownersservice manual. Occasionally you might be able to see that the resistor block is obviously broken elements are open.

Set an ohms range that is equal to or higher than the value of the resistor to be tested. Remove power from the circuit containing the resistor. The resistor value will be printed.

If you look at a resistor one end should have a gold silver or white band. Testing a resistor with an ohmmeter is the best easiest and most effective way to tell whether a resistor is good or not. However if any resistors are open infinite resistance the block is just condemned and replaced automatically.

Check the reading to determine if the resistor is good. Touch the red lead from the meter to one side and the black lead to the other. How to test a resistor.

Read the resistor value visually. Resistors do not hold a polarity so it doesnt matter which side gets the red or black lead. Set your meter to an appropriate range.

You will next need to determine the rated value of the resistor. If the resistor shows signs of blackening or charring. The next test is to apply heat to the thermistor.

Switches are tested using an ohmmeter or continuity tester. Before you can test a resistor you need to know its strength and tolerance. Isolate the resistor from the circuit.

Turn the resistor so that this band is to your right. If it is near its rated resistance value then so far it is good. How to check a resistor steps in order to test a resistor it is important to first disconnect one lead from the circuit.

To check to see whether a resistor is good or not we need to only perform one test and this is to check the resistors resistance value using the ohmmeter of a multimeter. This is the first preliminary test to check whether a thermistor is good. Attach the clip lead of the test light to a good ground like a bolt screwed into metal and touch the sharp probe end to the terminals on the fuse.

Test the fuse with the ignition key on using the 12 volt test light.