Ignition Fuse Keeps Blowing – How To Solve This Problem

As soon as you have turned the ignition key on,  it starts blowing immediately.

Perhaps you have faced it and driven to our site to find a way to get out of the problem. 

To diagnose a blown ignition fuse, first and foremost you have to know the valid reasons behind it. 

Fuses protect the overflow of electricity in your circuit. And when there is excessive electric supply, it starts melting the wires by a fire.

Then? What to do when the ignition fuse keeps blowing

Just keep reading the article until the end. We have written a step by step guide for helping you to solve the problem of blown ignition fuse. 

Some Basics Knowledge About Fuses

There are several types of fuses. Yet, all the types work in a basic theory. The power supply passes through the fuse by-way-of a little metal line or a source that brings a blockage in the whole system. If the current supply gets too it will be overheated. At this moment, the strip starts melting. Therefore, while diagnosing your ignition fuce you should check whether there is an electrical short circuit.  

The Major Causes Of Ignition Fuses Blowing

ignition fuse keeps blowing
source: https://www.suzuki-forums.com/

There are some valid reasons behind for an ignition fuse to be blown. Fuses protect the overflow of electricity in your circuit. That means an ignition fuse works as a protection of a circuit to restrict e

xcessive current flow. And then, it starts melting the cables by a fire.

But when it is in a vehicle, the malfunction will bring some other problems in the electrical system of that vehicle.  

Let’s know how a blown ignition fuse creates problems in your car.

Failed Ignition System 

Most often, the problem happens in the ignition switch or the cables connected to the system. Or, if the distributor contains a faulty or bypassed ballast resistor, then it may also blow ignition fuses. Yet, this is a rate case unless a poor wiring job has been done on the resistor. 

Again, the problem might be with the coil. 

Ancillary Faults

Some vehicle’s ignition system uses a mutual circuit with the motorized components. Let say, a fuel pump, power window motor, cooling fans, starter, and many more. 

It creates a huge chance of blowing your ignition fuse cause an electric motor constantly uses a particular amount of current and thus high voltage is created.  

Higher voltage speeds up your motor, and more amp supply creates more torque. But when the motor will slow down, there will be less voltage and higher amperage. 

In that case, your ignition fuse will be blown straight away. 

Wiring Or Computer Faults

Check all the wires throughout. There are several heated parts on an engine that may get burnt for the cable’s insulation and short them. 

When there is fuel injection, then the issue may be with an inward short in the computer. This is a serious issue. 

Multiple Circuits

Issues with ignition fuses often arise from problems across various circuits. An overloaded circuit, short circuit, or even issues with the ignition switch itself can lead to ignition fuse failure and, thus you might have trouble starting your vehicle.

Ignition Fuse Keeps Blowing – How To Solve This Problem

Below we have noted the ways you can solve the problem of blown ignition fuse. Follow the steps carefully to fix your blown fuse:

1. Disconnect Other Electrical Appliances

First of all, you have to have a clear idea of the place that caused the outage. Accordingly, you will be able to specify which fuse has gone blown. 

You can check the light switches of all points to know where the power is lost. Now, turn these lights off in the malfunctioned points and disconnect those units.  

2. Turn The Power Off

Now, you have to disconnect the main power supply source to your fuse box. Do it through the electrical panel.

3. Find The Fuse Box

This step seems simple, yet you may not even know where the fuse box is. 

If you know not where it is, then read the below article.

How to Find the Fuse Box or Circuit Breaker Box

4. Recognize The Broken Fuse

In this step, it’s time to specify the blown ignition fuse. Ignition fuse is a built-in cable that can melt and stop working if your circuit of the electricity level overruns a safe point. The fuse works as safety equipment to stave off an electrical flame. 

So, you can easily know the blown fuse by checking the condition of the fuses. 

5. Replace The Fuse


As the ignition fuse is no longer kept in the system, now it’s time to replace your ignition fuse with a new one.

Always ensure a fuse with the equivalent amperage grade. You can find the perfect fuse online on Amazon or by going to a hardware shop and asking for a matched one. 

Check these automotive ignition fuse replacement tools on Amazon. (And check which one suits your vehicle)





6. Check Your New Set Up

If you could set up the new ignition fuse, now the task is almost done. Turn on the major power supply and check whether the electric circuit is functioning or not. Plug it with the necessary utensils, and see the performance. 

If it’s still not working or blowing again, this time you had better seek professional help.

When You Had Better Seek Professional Help?

When the circuit breaker or ignition fuse is continuously falling or blowing, perhaps this is a major issue that needs a professional touch. If you find it difficult to work with it, then seek professional bits of help. 

As The Spruce noted, sometimes an ignition fuse may fail for short circuit problems generated from vague wire connections. Maybe there are broken wires or some inside wiring issues. 

In that case, if you just keep fixing the blown fuses, no solution would come from your work. Then, you had better go for professional mechanics to solve your ignition fuse problem. 

Can A Faulty Ignition Fuse Cause Your Car To Not Start?

In general, a faulty, broken or blown ignition fuse just brings some minor electrical issues in your car. Such as, it may cause your inside lights or backup lights not turning on, or the problem might be with your radio. There may be a turn signal, or few other features not working okay. 

Although, in some cases, your blown ignition fuse will cause the car no start problem.

Frequently Asked Questions

How do I know if my ignition fuse is bad?

You’ll know your ignition fuse is bad if your car doesn’t start or struggles to start. Other signs can include problems with electrical components like the radio or headlights. Visually, a blown fuse may appear burnt or the metal wire inside could be broken.

What happens if the ignition fuse blows?

Your vehicle may not start if the ignition fuse blows. Power from the battery to the ignition system is interrupted, preventing the engine from starting. Additionally, some electrical components may not function correctly if your vehicle’s ignition fuse shares circuitry with other things, like cooling fans or electric windows.

What fuse stops a car from starting?

Many fuses are essential for your car to start. The most notable ones are the ignition fuse, the starter relay fuse, and the fuel pump fuse. If any of these are blown, they can disrupt the power flow and stop your car from starting.

How much does an ignition relay cost?

The price of an ignition relay depends on the make and model of your car. Usually, they’re priced between $20 and $100. Note that this cost doesn’t cover the installation labor if you decide to hire a professional for the task, and in some cases, the best idea is to ensure a professional fits it to ensure it works correctly.


Ending the guide, you should be able to solve your ignition fuse problems by your own. But,  at times the ignition gets more complicated and simple fixes don’t fix it at all. 

At that time, you should call for technical support to a professional mechanic. 

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