How to Test Circuit Board With Multimeter

Testing a circuit board with a multimeter can help identify faulty components and diagnose problems in electrical systems. It is an essential skill for any electronics technician or hobbyist. With the right knowledge, you can quickly detect areas of concern and address them before they lead to bigger issues down the line.

How to Test Circuit Board With Multimeter

The benefits of testing a circuit board with a multimeter are immense. The accuracy and precision provided by the digital readout make it much easier to diagnose and troubleshoot issues on the board. Also, multimeters can measure both voltage and resistance, making it possible to pinpoint electrical faults in the circuit board more accurately. In this blog post, You will learn in detail how to test circuit board with multimeter.

Causes of Test Circuit Board With Multimeter

  • Measuring Voltage: Multimeters are used to measure the voltage passing through a circuit board to determine if it is functioning properly. By attaching the meter’s probes to either side of the circuit board, you can easily check for any irregularities in voltage passing through the board.
  • Checking Continuity: To check for continuity, you need to use the multimeter’s Ohm setting. This will allow you to determine if there is a complete connection between two points on the board. If no current flows through the path, it indicates an open circuit.
  • Testing Diodes: A diode is an electrical component that allows current to flow in only one direction. You can use a multimeter to test the functionality of a diode by setting it to the Diode Test mode and connecting the probes across the pins of the diode.
  • Testing Resistors: A resistor is an electrical component that restricts or regulates the flow of electric current. To test a resistor, you need to use the multimeter’s resistance setting and measure the resistance across its pins.
  • Troubleshooting: A multimeter can be used to help troubleshoot any problems with a circuit board. By measuring voltage, continuity, and other components of the board, you can quickly identify any faults that may exist.
  • Detecting Short Circuits: A short circuit is an unexpected connection between two points in a circuit that can cause the circuit to overload. By measuring current with a multimeter, you can detect any shorts and repair them before they cause any damage to your equipment.

By using a multimeter, you can easily test the components of a circuit board to check that it is working correctly. With its various settings, you can easily detect any irregularities and troubleshoot problems.

By Using a Multimeter

Step by Step Processes for How to Test Circuit Board With Multimeter

Step 1: Inspect the Circuit Board

Before testing a circuit board with a multimeter, it is important to inspect the board closely for any signs of damage or wear. Look for cracks on the surface, loose components, missing parts, and burnt spots. Make sure you have all the necessary tools before starting your test. A digital multimeter, a set of slip-joint pliers, and a flathead screwdriver are all necessary for testing the circuit board.

Step 2: Set Up the Multimeter

To test your circuit board, you need first to set up your multimeter. Place it on a stable surface and make sure that you have access to both the circuit board and the multimeter. Carefully connect the cable for your probes to the end of your multimeter. Make sure that they are properly connected before proceeding with any tests.

Step 3: Select a Mode on Multimeter

Choose either Resistance or Continuity mode, depending on which type of tests you plan to do on the circuit board. Place the probes over different components and test for continuity by reading the multimeter’s display. If there is continuity, it will read zero ohms.

Step 4: Test for Resistance

In order to check for resistance in different components, you will need to change modes on the multimeter. Set it to resistance mode, and place the probes over different components. Use your flathead screwdriver to check for any loose connectors or wires that may be hindering your test results. If you find any, tighten them with your slip-joint pliers.

Step 5: Check for Power Supplies

Test the power supplies, such as batteries and AC adapters, to ensure they provide enough voltage to your circuit board. If the readings are not what you expect, it may be time to replace them. If you find any damaged components or discrepancies in your test results, it is important to troubleshoot the issue. Consult a professional if necessary to get more detailed instructions on how to fix the problem.

Once you have followed these steps and performed all of your tests, you can be confident that your circuit board is properly functioning. Testing with a multimeter is easy and can help you spot potential problems early on.

Test the Power Supplies

Safety Precautions for How to Test Circuit Board With Multimeter

  1. Read the user manual and understand the safety guidelines before using a multimeter for circuit board testing.
  2. Wear protective equipment such as gloves, goggles, and face masks when using a multimeter on circuit boards.
  3. Before connecting any probes to your circuit board, ensure they are properly connected and secured.
  4. Before testing, turn the multimeter off to avoid accidental shocks or sparks.
  5. Make sure that all power sources are turned off before you use a multimeter on circuit boards, including batteries and AC outlets.
  6. Be mindful of other components around your circuit board when testing with a multimeter.
  7. Never use a multimeter on any component that is wet or damp, as this can increase the risk of electric shock.
  8. Test one circuit board at a time and avoid checking multiple boards simultaneously to prevent overload and damage to the components.

Following these safety precautions will help ensure that your circuit board testing with a multimeter is conducted in a safe and reliable manner.

Are There Any Special Techniques to Use When Measuring Resistance Levels on the Components of a Circuit Board? 

When testing a circuit board with a multimeter, knowing which type of measurement you are trying to take is important. To measure the resistance level on components of a circuit board, you will need to use an ohm meter setting. This setting will allow you to measure the resistance levels between two points in an electrical system by sending a small current through the circuit and measuring the voltage.

When Testing a Circuit Board

To start, make sure your multimeter is set to the ohm meter setting. Once you have done this, you will need to determine which two points need to be measured in order to take a resistance reading of a single component or group of components on the circuit board. Depending on the type of circuit board you are testing, the two points can range from a common ground or power source to two discrete points.

Are There Any Troubleshooting Tips That Can Help Diagnose Issues Before Testing a Circuit Board With a Multimeter? 

Several tips can help diagnose issues before testing a circuit board with a multimeter. One of the most important things to do is visually inspect the circuit board for any damage or signs of corrosion. If you notice any issues, replacing the components or seeking professional repair advice is best.

Another step to take before testing the circuit board with a multimeter is to double-check all wires and connections are secure and that all of the components are functioning properly. Any parts that appear worn or damaged should be replaced or repaired. Next, using an isolation transformer when testing the circuit board with a multimeter is good practice. This will help to protect your device if there is an electrical fault or short.

How Often Should One Test a Circuit Board With a Multimeter? 

Testing a circuit board with a multimeter should be done regularly. It’s important to check the board annually or semi-annually for any issues that may have occurred since the last test. You may want to perform more frequent tests depending on how often you use your circuit board. For example, if the circuit board is used in a mission-critical application, testing it every few months may be necessary.

In order to perform the test, you will first need to locate each of the wires and components on your circuit board. Then, set your multimeter to measure continuity. To do this, press the “Mode” button until you reach the “Continuity” setting.

Once you have done this, connect one of the multimeter probes to each wire or component on the circuit board and check for continuity. If there is none, then there is likely an issue with the circuit board.

Set Your Multimeter to Measure Continuity

What Additional Information is Needed Before Attempting to Test a Circuit Board With a Multimeter? 

Before attempting to test a circuit board with a multimeter, it is important to gather additional information. This includes understanding the type of board being tested and what components it contains, familiarizing yourself with the different types of readings possible from a multimeter (such as volts, ohms, and amps), and having knowledge of electrical safety procedures.

For example, the multimeter should be set to the appropriate range before testing since measuring too high or too low could damage the board. Additionally, it is important to ensure that any probes used are properly insulated and long enough to reach the contacts on the circuit board and stay in place during testing.

Finally, having an understanding of the schematic and drawing of the board being tested is essential since it will help identify which connections need to be tested and what type of readings should be expected.


In conclusion, testing a circuit board with a multimeter is important in troubleshooting any electronic device. Knowing the basics of how to use a multimeter can help you identify any potential issues before they become more serious and costly to repair.

With the right tools and some practice, anyone can learn how to test their circuit boards for problems. By following these simple steps, you can ensure your device runs safely and smoothly. I hope this article has been beneficial for learning how to test circuit board with multimeter. Make Sure the precautionary measures are followed chronologically.

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Enrique Howard

Hi, I am Enrique. I started my professional life as a handyman and did a lot of external and internal repair of home and office with a little bit of electric and plumbing support. I have extensive experience in tools testing such as drilling, turning, milling, and non-conventional machining like EDM. So let me help you on your journey towards becoming an enlightened DIYer with amazing tools that you can use on your project.

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