How to Test a Fuse with a Multimeter

Before you go out and buy a new fuse, be sure you know which one is blown. Although it is simple to visually test glass fuses for continuity, the majority of fuses are solid and cannot be visually inspected. So you should check the fuse with a multimeter before you purchase it.

Multimeters can measure current, voltage, and electrical current flow. You may test a fuse by measuring its continuity or ohms. So keep on reading if you want to know how to test a fuse with a multimeter.

What exactly is a Fuse?

When an electrical overload occurs, a fuse is just a little piece of wire enclosed in a particular housing that is designed to burn in half. All that remains is to examine if that wire will still be in good working order.

Even though the view is typically poor, the wire is often extremely thin, and errors are often. A 30-second exam is flawless and will tell you all you need to know.

How to Test a Fuse with a Multimeter?

There are several electrical and electronic components that must be examined today. It is advantageous to have test leads or a multimeter. You may check the state of your fuse box in your house or car in this manner. It is important to note that fuses might fail when you least expect them.

It is also required to inspect the fuse from the inside. In this scenario, learning to see inside a fuse will save you the hassle of testing your fuses with a multimeter.

It will be considerably simpler to tell the difference between a good fuse and a blown one. So here’s what’s important:

  • Consider a fuse’s voltage.
  • Calculate the ohms value.
  • Fuse testing in a fuse box
  • If a fuse has blown, measuring resistance is necessary.
  • Examine the circuits’ present status.

How do you use a multimeter to see whether a fuse has blown?

In this instance, visually inspecting a fuse for blowing may not be adequate. As a result, using a multimeter to eliminate all concerns is really beneficial. So, the goal here is to do an electrical test and determine what happened with a fuse.

  • To begin, make sure your multimeter is set to continuity mode.
  • This method of operation is currently available on the majority of the top multimeters.
  • Then, at one end of the fuse, one of the probes must be put.
  • Your multimeter’s other probe must likewise be inserted at the opposite end of the fuse.

The major goal here is to determine whether or not the fuse is in excellent working order. The multimeter should beep in continuous mode to indicate that there is continuity.

  • If you can check for continuity, the fuse is not blown.
  • On the other hand, the multimeter might indicate a high degree of resistance without generating a sound.
  • You could use an ohmmeter rather than a multimeter if your multimeter doesn’t even have a continuity function. So, choose an ohmmeter and set each waveform at the fuse’s opposite ends.

How to use Multimeter for testing Fuse?

You must utilize the continuity mode on your multimeter to be able to test a fuse using a multimeter. If your multimeter detects continuity, the fuse is in excellent working order.

If your multimeter does not detect continuity, it is most likely a blown a fuse. You’ll also need a digital multimeter with seven functions for this.

  • You’ll need to employ the resistance mode between each relay pole in this situation. All of the connections’ readings must be zero ohms in the appropriate pole.
  • At the same time, if the probes are placed in the corresponding pole, the contacts in that region should be seen as an infinite resistance reading.
  • After activating the relay, you can proceed. When the relay is turned on, you will hear a clicking sound.
  • You may also use your multimeter to check the solid-state relays.
  • To test this sort of relay, you’ll need the diode reading in this case. The voltage applied to the relay will be measured by the multimeter.
  • The meter will indicate zero or OL if a relay is not operating. A good relay, on the other hand, should yield a result of 0.5 or 0.7, depending on the type of relay.

Final Words

So this is all from us about testing the fuse with a multimeter. You’ll be safe from thereafter testing the fuses in your home. A multimeter may always be used to check a fuse. You may check if the circuits are in excellent working order here.

As a result, you should invest in a digital multimeter because you will almost certainly need it to test a fuse. This will check that all of the fuses in your house are operational. It’s also a method for detecting and avoiding electrical problems in your home.


What’s the best way to tell whether a fuse has blown?

Remove the fuse from its holder. In rare cases, a little screwdriver may be required to remove the fuse holding lid. Look at the fuse wire. If there is to see the wiring or a black and metallic smear inside the glass, the fuse has blown and must be replaced.

How do you tell if the fuse on a circuit breaker has blown?

Examine each fuse in your electrical panel to see whether a piece of metal has melted inside or if the glass pane just at head of the fuse has become discolored. In your home, you have a blown fuse.

How do you tell if a fuse has blown without the need for a multimeter?

One wire should be connected to the neutral/common side of the fuse, while the other should be connected to the line side. If there is enough voltage, the bulb will turn on. Transfer the wire from the line to the load side of the fuse. If the fuse is good, the light will turn on.

error: Content is protected !!