How To Check A Car Fuse Without A Multimeter: 2 Easy Ways

How To Check A Car Fuse Without A Multimeter

“You Don’t Need A Multimeter To Check Your Car’s Fuses!”

A fuse is a type of electrical device that is used to protect against overcurrent in an electrical circuit. Fuses are designed to “blow” or “open” when too much current flows through them, thus interrupting the flow of electricity and preventing damage to the circuit. It is usually made of metal or ceramic material that melts when it gets too hot, which breaks the circuit and prevents further flow of current. The car fuse is placed in between the battery and the electrical component that it is protecting.

If you’re like most people, you probably don’t have a multimeter just lying around the car. That’s okay! You can still check your car fuse without a multimeter. Read on to know how to check a car fuse without one. In this article, we will discuss two methods to test a car fuse without a multimeter.

How To Check A Car Fuse Without A Multimeter

Assuming that you do not have a working multimeter to check a car fuse, there are still a few ways that you can check to see if the fuse is blown. Many people think that this requires a multimeter, but there are actually a few ways to check a car fuse without one.

If you find that your car accessories have stopped working, it may be a blown fuse. Checking a car fuse without a multimeter is easy and only takes a few minutes. Below is the step-by-step procedure to test a car fuse without a multimeter.

Method 1. Visual Inspection

Visual Inspection Of Fuse
Visual Inspection Of Fuse

This method of testing a car fuse without a multimeter involves checking the metal element of the fuse visually out of the fuse box. A good fuse has a metal element bridge from one end to another end encased in semi-transparent plastic housing, which is visible from the outside, where you can detect a blown fuse.

On the other hand, a blown fuse has a broken metal element bridge between two terminals. To know how to inspect the fuse visually first safely remove the fuse from the circuit through a plier or fuse puller and visually inspect under good light.

You will see a metal bridge across two terminals. If you could see it. It means the fuse is good.

Visual Inspection Of Blown Fuse
Visual Inspection Of Blown Fuse

But, if you see a broken bridge. It means the fuse has blown.

One important point you need to know is that it is easier to spot a break in the metal element of a higher amperage rating fuse than a lower amperage rating.

I have already mentioned this point in my article the metal element size varies based on the amperage rating of the fuse. The higher the amperage rating the more width the fuse metal element has. It means you can quickly figure out a 30 amp blown fuse than a 0.5 amp blown fuse.

This is an Alert:
Bear in mind, some glass tube fuses are blackened due to the blowing, and it is hard to spot broken metal elements in the fuse due to its dirty housing case.

Method 2. Swapping The Fuse

This is another method of testing a car fuse without a multimeter. In this method, you can check an automotive fuse without a multimeter by swapping. You can quickly identify a good or bad fuse by exchanging a good fuse with a suspected fuse in a good working circuit within the car.

First, find out a good working circuit of the amperage rating fuse similar to the suspected fuse.

Removing The Suspected Fuse
Removing The Suspected Fuse

Remove the suspected fuse and put it in a good working circuit. Now, look at the circuit, if the circuit works with the suspected fuse. It means the fuse is good. The problem might be somewhere else in the circuit.

If the good circuit doesn’t work with the suspected fuse.

It means the fuse has blown.

This Is A Caution
Don’t put the good fuse in the suspicious fuse’s circuit, you might blow the fuse or the chances are that the circuit can burn.


Sign Up

    About The Author

    Leave a Comment

    Your email address will not be published. Required fields are marked *

    Scroll to Top