Skip the auto shop - Our mechanics make house calls

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

Anti-lock fuse

Bad or Failing Anti-Lock Fuse Or Relay Inspection

by a top-rated mechanic at your home or office

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.

HAVE SYMPTOMS OF CAR TROUBLE?
Get an $80 diagnostic
by a top-rated mechanic at your home or office.

Get a quote · Book an Appointment · Our expert mechanics come to you.

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.

HAVE SYMPTOMS OF CAR TROUBLE?
Get your car fixed at your home or office.

Get a quote · Book an Appointment · Our expert mechanics come to you.

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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Still not sure about your car's issue?
Diagnose your car
What kind of issue are you experiencing?
Brakes are squeaking
Car is not starting
Car is overheating
Car is shaking (vibrating)
Fluids are leaking
Heating and A/C
Smoke or steam is coming out of the car
Warning light is on
Icon-warranty_badge-02

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

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

More related articles

Symptoms of a Bad or Failing Flexible Clutch Hose
Common signs include difficulty shifting, low clutch fluid, and feeling no resistance at the clutch pedal.
P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem What the P0121 code means P0121 is a generic OBD-II code which indicates that the Engine Control...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...


Related questions

Q: Short in turn signals

Hi. If the fuse is blowing, you have a short to ground. If the parking lights flash with the turn signals or the brakes, check all 4 bulbs. There are two filaments in your turn bulbs. When either burns out,...

Q: Converting to hydro-boost braking system on a 1990 Thunderbird Super Coupe

It depends on what you want to do. If you want to keep the car, I would convert it to hydro-boost brakes. It's a better system. Forget about that ABS system. The old ABS systems didn't work all that well....

Q: Wire burnt to the fan relay in fuse box

It sounds like your vehicle is experiencing some sort of electrical problem. As these problems are sometimes difficult to diagnose, I would recommend having a professional technician, such as one from YourMechanic, examine the fuse box, and conduct any other...