Symptoms of a Bad or Failing Fuse

Fuses are simple electrical devices that are designed to stop electronic circuits from being overloaded. They come in many shapes, sizes, and designs, however, most automotive fuses use a strip of wire that will melt or break if the amount of current that is passing through it exceeds the amperage rating of the fuse. The fuse will blow in order to protect the circuit, wiring, and components from possible damage due to excessive current. When fuses blow or have any issues they can cause problems with functions and accessories of the vehicle. Usually a bad or blown fuse will produce a few symptoms that can alert the driver of a potential issue.

Accessories or functions lose power

One of the first symptoms of an issue with a fuse is loss of power to one or more of the vehicle’s functions or accessories. Fuses are installed in line of specific circuits in order to protect those circuits from potentially overloading. If those circuits do become overloaded, for any reason, the fuse will blow and cut off power to the circuit in order to protect it from the possibility of damage. If you notice that any of the vehicle’s functions or accessories, such as the radio, wipers, power windows or locks, etc, suddenly cease to function it may be related to a fuse.

Fuse is blown

Another, more direct symptom of a bad fuse is a blown fuse. If the fuse is bad, upon retrieval and inspection the wire inside of the fuse will broken, burnt, or otherwise disconnected. A blown fuse will have to be replaced with a new one in order to restore function to the circuit. A blown fuse should also be investigated to determine what caused the fuse to blow in the first place.

While most fuses should last a long time as long as the vehicle’s electrical system is operating correctly, over time electrical systems and components can develop issues that cause fuses to blow. If you find or suspect that one or more of your fuses is blown or may be having an issue, have the vehicle inspected and diagnosed by a professional technician, to determine if the fuse should be replaced, and if another problem may be present.


Next Step

Schedule Vehicle Engine Electrical Inspection

The most popular service booked by readers of this article is Vehicle Engine Electrical Inspection. Once the problem has been diagnosed, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. YourMechanic’s technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM. We currently cover over 2,000 cities and have 100k+ 5-star reviews... LEARN MORE

SEE PRICING & SCHEDULING

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

Recent Vehicle Engine Electrical Inspection reviews

Excellent Rating

(17)

Rating Summary
16
0
0
0
1
16
0
0
0
1

Terry

26 years of experience
326 reviews
Terry
26 years of experience
Chevrolet Avalanche 1500 V8-5.3L - Ignition Switch - Glendale, Arizona
Terry was on time, efficient, effective and professional. Would/will request him again.
Chevrolet Silverado 1500 - Oil Change - Phoenix, Arizona

James

30 years of experience
862 reviews
James
30 years of experience
GMC Terrain L4-2.4L - Vehicle Engine Electrical - Windermere, Florida
very profesional,he did explain items properly

Victor

35 years of experience
223 reviews
Victor
35 years of experience
Chevrolet G20 V6-4.3L - Vehicle Engine Electrical - Albuquerque, New Mexico
he took the time to find out what was going on with the electrical system, I appreciate that

Juventino

21 years of experience
13 reviews
Juventino
21 years of experience
Jeep Wrangler L6-4.0L - Vehicle Engine Electrical Inspection - Harbor City, California
VERY knowledgeable mechanic, very professional, communicates his point clearly and listens intently to your concerns. Can’t say enough, at my wits end with this vehicle issue and now I can sleep at night.

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.

GET A QUOTE

Related articles

How to Replace Your Car's Fuse Box
A fuse box organizes all of the car's fuses and sometimes relays as well. A fuse box will usually fail from physical damage or electrical issues.
How to Replace an Instrument Voltage Regulator
The instrument cluster has a voltage regulator that fails when the panel is dim or flickering, reads erratically, or is totally inoperable.
How to Check Your Car Brake Lights
Car brake lights are essential for driving safely. Check the brake lights and brake fuses regularly to keep the brake system working well.

Related questions

Car won't crank up as well as some other electrical issues

This sounds like a BCM (body control module) malfunction. This could have been caused either by a low voltage issue (https://www.yourmechanic.com/article/how-to-check-the-voltage-of-a-car-battery) or a voltage spike. If the electrical system is dead, there is a power fuse that comes from the...

My alarm won't stop going off

This is a common issue with many Volkswagen models and is often times related to the security system. The doors and trunk have sensors on them that are armed when the car is locked or the alarm is set. Occasionally,...

Tachometer and temp guage

Hello. Thanks for writing in about your 1994 Mazda 626. The fuse that powers the gauges are the meter fuse 15 amp. It is located in the joint box. If this doesn't fix the issue, consider YourMechanic, as one of...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com