How to test fuse with Multimeter

Your Fuse is creating trouble for you and you don’t know how to test it? No problem this article on how to test a fuse with a multimeter is for you. It doesn’t matter if you are a newbie, we will test everything in detail.

Before we get into how to check fuses with a multimeter. First of all, I will a little about discussing fuse and multimeter?

What is a fuse?

testing fuse with multimeter

Fuse is an electrical component used for the protection of electrical circuits under abnormal conditions. Fuses may have different shapes and sizes but their functionality will remain the same i-e protection.

We will discuss in detail on

  1. How to test  car fuse with a multimeter
  2. How to check the thermal fuse with a multimeter
  3. How to test the home fuse using a multimeter

What is a multimeter?

A  Multimeter is a tool for measuring electrical quantities like resistance, voltage, and current. All these meters (ohmmeter, voltmeter, and ammeter) that measure those quantities are combined to a single meter are known as multimeters. There are two types of multimeters:

1. Analog Multimeters

Analog multimeters work on the principle of moving coil meters. These meters use the deflection of an indicator needle to indicate the level of the measurement on an analog display.

2. Digital Multimeters

There are different types of fuse we will discuss them one by one. Different types of tests like continuity and resistance test will be performed on fuses. Let’s start

how to test car fuse with multimeter

To test the car fuse using a multimeter follow these steps

1. Remove the Fuse From Circuit

To check a fuse, remove the fuse from the circuit because we can’t check the fuse when there will be power in the circuit.

2. Set up the Multimeter

Here is how to test the fuse with a digital multimeter

  • Insert the black probe in COM port and red probe in mAVΩ port.
  • Now rotate the multimeter knob to 20 ohms represented by Ω (Omega symbol).
  • Also, check the screen of the digital multimeter. It must display 0.

3. How to Test a Car Fuse with a Multimeter

  • Connect the Red probe with one terminal of the car fuse.
  • Likewise, connect the black probe to another.
  • If the meter is showing 0 or nearly 0 its mean fuse is working properly.
  • While on the other hand if the meter shows 1 its mean meter is damaged.

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How to Test Car Fuses Without a Multimeter

To check the car fuse without a multimeter follow these steps

1. Take Fuse Out

First of all, you have to find the fuse. These fuses are mostly present in car engines. So open the bonnet and take the fuse out. In some vehicles, it’s present in the dashboard beside the Steering wheel.

2. How to check car fuse without using a multimeter

  • Place the fuse in front of the light
  • You will see a strip inside the fuse
  •  If the wire is broken its mean meter is damaged.
  • otherwise, it is working properly

How to Test a Thermal Fuse Using a Multimeter

If your thermal fuse has stopped working don’t worry about anything. Here we will discuss in detail How to test the thermal fuse with a digital multimeter.

1. Set the Multimeter to Continuity

  • Insert the black probe in COM port and red probe in mAVΩ port.
  • Rotate the multimeter knob to continuity with the radio wave symbol.
  • Connect both probes if the meter gives a beep then the meter is working properly.

2. How to Test a Thermal Fuse with a Multimeter

  • Disconnect the power supply or remove the fuse from the circuit
  • Now connect the black probe at one end while the red probe at the other end.
  • If the multimeter gives a beep sound fuse is fine, otherwise it is damaged.

How to Test House Fuses Using a Multimeter

How to test fuse with Multimeter

Are you facing trouble with your fuse? No worries this guide will show how to test house fuses?

1. Set Multimeter to Ohms

  • Insert the black probe in COM port and red probe in mAVΩ port.
  • Rotate the multimeter knob to ohms with the Ω symbol.

2. How to Test House Fuses with a Multimeter

  • Remove the fuse from the circuit or remove it from the power source.
  • Now, connect the probe at both ends of the fuse.
  • If the meter shows 0 or nearly 0 fuse is in good condition.
  • Likewise if the meter shows 1 so fuse is damaged.

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Frequently Asked Questions (FAQs)

Here is the question most people are looking for

What setting do you set a fuse to on a multimeter?

There are different settings on a multimeter to set the fuse.

  • Ohm setting: Rotate the multimeter knob to Ohms Ω and connect the lead at both ends of the fuse.
  • Continuity Setting: Rotate the multimeter knob to continuity and connect the lead at both ends of the fuse.

How do you know if a house fuse is not working?

Resistivity Test

  • Rotate the multimeter knob to Ohms Ω and connect the lead at both ends of the fuse.
  • If the meter shows 0 or near to 0 values it is fine.
  • Likewise if the meter shows 1 it’s damaged

Continuity Test

  • Rotate the multimeter knob to continuity.
  • Connect the probe at both ends of the fuse.
  • If the meter beep, this shows the fuse is working otherwise it’s damaged

How can you tell if a house fuse is blown?

If the house fuse is blown, the power supply of the house will be cut off. You can also perform a continuity or resistance test to check if the fuse is blown. Replace it as soon as possible.

After reading this article how to test a fuse with a multimeter? you will be able to test the different fuses. We have tried to cover tests of different fuses and look for more and try to add those in the next update. Do you have any questions or suggestions please let us know in the comment section below.

By inham

Inhamullah Jadoon is an Electrical Engineer and Founder of geekyengineers.com. He has huge experience in the field of Engineering and assisting Engineers in Software and Hardware issues.