Signs Your Car Has a Blown Fuse

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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.


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YourMechanic Electric Problems Inspection Service

Average Rating

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Number of Reviews

513

Rating Summary
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Diego

20 years of experience
536 reviews
Diego
20 years of experience
Chevrolet Express 2500 - Electric Problems - Glendale, Arizona
Diego was professional & spent several hours on a Diagnostic...he was unable to isolate & identity the specific Battery drain problem, but did provide helpful evaluation number ranges to help with future eliminations.
Chevrolet Silverado 1500 - Electric Problems - Surprise, Arizona
Diego was very professional and explained to me what I need to do so this does not happen again. Very good person I will recommend him highly for future work. He knows what to do and quickly finds the issue to fix.... thank you for having him on your team. Best regards, Kent Robertson

James

15 years of experience
28 reviews
James
15 years of experience
Mitsubishi Eclipse - Electric Problems - San Antonio, Texas
All I can say he did an awesome job. Was very professional I would recommend him to all my friends and family!
Chevrolet Traverse - Electric Problems - San Antonio, Texas
Mr. Potter was very nice and professional. Checked on my problem with my car and told my my results and gave me an estimate...

Chris

21 years of experience
1777 reviews
Chris
21 years of experience
Hyundai Accent - Electric Problems - Rancho Santa Margarita, California
Chris showed up early and was very knowledgeable. He did an excellent job explaining his work and and patient with answering questions. Overall great experience.
Toyota Camry - Electric Problems Inspection - Garden Grove, California
I am happy with Chris recommendation, he also was professional, friendly and he also was early the appointment.

Damian

10 years of experience
430 reviews
Damian
10 years of experience
Chrysler PT Cruiser - Electric Problems - Sanford, Florida
DAMIAN SHOWED UP EARLY AND WAS VERY COURTEOUS AND PROFESSIONAL.I WAS VERY IMPRESSED WITH HIS ELECTRICAL KNOWLEDGE. HE FOUND THE PROBLEM WHEREAS ANOTHER MECHANIC SAID WE SHOULD JUNK THE CAR. THANKS DAMIAN
Ford Escape - Electric Problems - Palm Bay, Florida
Damian was very professional and courteous, he explained everything that he was doing. Found the door lock had corrosion and fixed it in a very timely manner. Will recommend him to friends and family.

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