Symptoms of a Bad or Failing Anti-Lock Fuse Or Relay

Virtually all automotive systems that are electrical in nature run their power through some sort of system of fuses or relays and the ABS is no exception. Because fuses are essentially a bridge for power in electrical circuits, when they fail they can cause all sorts of problems for their respective systems and should be replaced. Fuses are usually installed into smaller individual circuits with low current draw, while relays are more commonly used for higher amperage circuits.

When they fail, they can cause all sorts of problems for the system that they were providing power for. Specifically, when the fuses and relays of the ABS system fail, usually the vehicle will display a few symptoms that can alert the driver that there may be a problem with an ABS fuse or relay.

1. Illuminated ABS Light

One of the first symptoms of a blown fuse or relay is an illuminated ABS Light. The ABS Light will become illuminated once the computer has detected that there is a problem with the system. If a fuse blows, or a relay fails, the computer will pick up the signal and activate the Check Engine Light to alert the driver that a problem has occurred. An ABS Light can occur for a wide variety of reasons, so if it does come on, have the vehicle scanned for codes to help shed some light on what the problem may be.

2. Tires are locking up regularly

Another symptom of a possible problem with a fuse or relay is a malfunctioning ABS system. More specifically, a failed relay may cause the ABS symptom to act up. If the relay is unable to adequately supply the ABS system’s electrical needs, it may cause the system to malfunction. In some cases, the ABS system may even activate at random times, sometimes even while the vehicle is in motion.

3. Blown fuse

One of the most obvious symptoms of a fuse or relay problem is a blown fuse. Fuses are designed to handle a specified amount of amperage, and are designed in a way that if the set amount is exceeded, the fuse will literally blow to protect the circuit. Close inspection of a blown fuse should reveal a dark and perhaps cloudy appearance on the inside of the fuse. The wire inside of the fuse should also be visibly split when the fuse is blown. A blown fuse will usually deactivate the entire system, or at the very least the circuit that it was responsible for powering.

Because the anti-Lock fuse and relays are what power the entire ABS system, they are very important electrical components to any vehicle. For this reason, if you suspect that your ABS fuse or relay may have failed, have a professional technician, such as one from YourMechanic, diagnose the electrical system to determine if the car needs the anti-lock fuse or relay replaced.


Next Step

Schedule Brake System Inspection

The most popular service booked by readers of this article is Brake System 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 Brake System Inspection reviews

Excellent Rating

(301)

Rating Summary
280
12
3
1
5
280
12
3
1
5

Johnny

33 years of experience
264 reviews
Johnny
33 years of experience
Toyota RAV4 L4-2.4L - Brake System Inspection - Sacramento, California
Johnny arrived early which was great, he performed the inspection in less than half an hour, and gave us a complete quote for all items needing attention, including the brakes as our main concern. Johnny is fast and efficient so I scheduled the work done by him.
Ford Escape - Brake System Inspection - Sacramento, California
The convenience is worth the cost. I was also tired of the dealership not really caring about my old car. Last couple of times I had to wait well over an hour to get my car after the dealership said "It's ready!". They also wouldn't fix the things I asked saying they didn't have time and I need to come back.

Jay

37 years of experience
947 reviews
Jay
37 years of experience
Chevrolet C10 Pickup V8-5.4L - Brake System Inspection - Moreno Valley, California
Knowledgeable, Professional, Friendly, and PATIENT! Sickeningly HONEST, as I tried to ply him with cash, alcohol, outside work, and wild dancing girls - although I wouldn't have "ratted him out" if he HAD accepted. A guy like this needs a "bigger cut" than what you are paying him ... because loyalty like his is hard to find these days! THANKS!
Volkswagen Jetta - Brake System Inspection - Moreno Valley, California
As usual, Mr. Jay provides efficient and professional quality of work. I would highly recommend him to any customer searching for a good mechanic.

Christopher

10 years of experience
114 reviews
Christopher
10 years of experience
Ford Explorer V6-3.5L - Brake System Inspection - Katy, Texas
Christopher was very knowledgeable and was able to address our concerns. We would trust him with future service needs.

Jesse

16 years of experience
61 reviews
Jesse
16 years of experience
Nissan Frontier V6-3.3L - Brake System Inspection - Flagler Beach, Florida
Jesse took the time to explain everything that was going to be done and why and then proceeded to repair my truck not only professionally but quickly. As a disabled Veteran and no longer able to perform work that was needed to be done it is nice to know a mechanic such as Jesse will take the time to explain all the various issues and what needs to be done before a blanket you need everything. After Jesse went thru everything I felt comfortable that all work was required and needed. 8 can safely say I will use yourmechanoc .com again and hope I can request Jess

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

Why ABS Control Module Replacements Can Be Tricky
Replacing the ABS control module can be challenging, as it is likely to be connected to many parts of a motor vehicle.
How to Replace an Ignition Relay
Common signs of a damaged or broken ignition relay include a low/dead battery, the car stalling or not starting, or loss of power to the dash lights.
Driving With ABS in Snow and Ice
The anti-lock braking system, referred to as ABS, does not work as effectively in snow, but does retain mild effectiveness on icy roads.

Related questions

ABS light is on
An amber ABS light means that there is a fault in the ABS system and there are codes waiting to be read. I would suggest having a certified mechanic, like one from YourMechanic, scan for codes and diagnose your ABS...
Crank no start
Hey there, thanks for asking about your 2002 Ford Crown Victoria. Burned wires can signify that there has likely been a short somewhere in the electrical system. Often times when this happens, it is quite easy for the car's computer...
All lights are working except my tail lights. What's the problem?
The front and rear parking lights are on the same circuit, so first, check to see if the front parking lights are working. If the parking lights are not working with the headlight switch in the on position, then locate...

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