Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

How to find the cause of a blown fuse.

Model: (Various brands) Various
Part: Fuse box

The method shown in the video for testing fuses uses a DVOM tester in "diode check" mode. We can find the device on Amazon with the code B0BGXYLDCF at a price of €20.86, with free delivery in 10 days. We identify the circuit, visually inspect the wiring, and check that no aftermarket components have been installed, as this is indeed the most common cause for a fuse to blow. We look for signs of burning not only on the wiring but also on the connectors, sockets, and plugs of the components themselves.

A practical test that prevents blowing additional fuses is to prepare the circuit and configure the multimeter correctly; we connect the black probe to a good ground and use the red probe to touch the output terminal of the fuse holder (the one going towards the components, not towards the battery). If we hear a continuous sound, this indicates a short to ground: the circuit is closed where it shouldn't be. With the multimeter still indicating a short, we begin to disconnect all components of that circuit. After each disconnection, we check the multimeter again. When it stops sounding, the last component we disconnected is the culprit.

Posted on 14 December 2025 by ScegliAuto

Video tutorial

Related tutorials

How to Replace a Fuse
How to Replace a Fuse
(Various brands) Various There is always talk about where the fuse boxes are, but rarely about how to change them. This guide is generic and explains how to replace a fuse wh…
How to Test the Fuses in Your Car
How to Test the Fuses in Your Car
(Various brands) Various Let's see how to test the functionality of the fuses in your car. You will need a test lamp, which can be found, for example, on Temu with the code 6…
How to replace a blown fuse in a car
How to replace a blown fuse in a car
(Various brands) Various In this short video, we see how to replace a blown fuse in our car: the fuse extraction tool is usually found in the fuse box itself. We identify the…

Other guides you may be interested in

    Frequently Asked Questions

    • Vari - Where is the fuse box located on the Vespa GTS 125? Read answer
    • Vari - What is the "WSW" fuse? Read answer
    • Vari - Where are the fuses located on a Ligier X-Too? Read answer

How to Connect the Cables to the Battery of the Citroen Xsara Picasso?

In this tutorial, you will see how to connect the cables to the battery of the Citroen Xsara Picasso, useful if you need to recharge it or perform an emergency start. First, ensure the key is not inserted, then open the bonnet and move to the front of the left headlamp. Next, locate the bolt just behind the filter box and connect the positive terminal clamp to it. Now you can connect the negative terminal to any point on the chassis, such as the indicated point. Once the operation is complete, ensure you disconnect the negative first and then the positive.

Watch the video!


by ScegliAuto

More videos