Skip the auto shop - Our mechanics make house calls

Signs Your Car Has a Blown Fuse

blown fuse new

If you own your car long enough, you can assume that at some point, one or more of your automotive fuses will blow.

Usually, a blown fuse just causes a minor car electrical problem, like backup lights or interior lights not working, not being able to use your radio, losing a turn signal, or some of your climate control features not functioning properly. In rare cases, though, a blown fuse can mean that your car won’t start.

Problems that cause fuses to blow

If you have multiple problems, something could be seriously wrong in your wiring harness or computer system. These are serious issues, and you won’t be able to diagnose the car problem on your own – you will have to see a mechanic. But if it’s just one thing, odds are that it’s a fuse.

All cars use fuses, and if your car has an electrical problem, it could very well be because a fuse has heated up, melted, and interrupted the flow of electricity. Sometimes, a blown fuse indicates a larger problem, but they also blow for simple reasons, like the driver overloading the system by using every available accessory at the same time. They can also blow because they’re past their “best before” date.

Fuses can also blow if someone has replaced a bad fuse with one that is of a higher amperage. The most common amperages are 15, 20 and 30, and replacing a 15 amp fuse with a 20 or 30 amp, or a 20 amp fuse with a 30 amp, may result in a blown fuse. Worse, it could cause a more severe car electrical problem, because it can cause wires to melt. Conversely, replacing a higher amp fuse with one of a lower amperage will probably not power the component that isn’t working.

If you suspect you are experiencing electrical problems with your car, a mechanic can diagnose the problem and determine if it’s a bad fuse, or something more serious.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.


Post a question and get free advice from our certified mechanics.


More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...

Related questions

Q: Navigation system and CD player stopped working

Hello. Most units for this model are not serviceable. Besides updates and software-type repairs, if there is damage to the unit causing the issue, you must replace it. Now if there are issues with power supply, that's a different...

Q: Radio,clock, interior lights and fob don't work

Hello. If you replaced the fuse and it still does not work, then you more than likely blew another fuse also. I would first double check the fuse that you replaced to make sure that it is okay. If it...

Q: My gas gauge keeps fluctuating from empty to full and everything in between.

The symptoms you are having may be related to a mechanical issue, or an electrical issue. If the problem is electrical, you will want to check the wiring terminal that connects to the fuel pump. You may need to drop...