How to Disable a Car Alarm

There are few things more embarrassing (or more annoying, if it’s a neighbor’s car) than a car alarm that won’t shut off. There are a number of reasons that a car alarm won’t turn off, and a few different methods you can use to silence the shrieking – and end the embarrassment.

Part 1 of 1: Turning off a car alarm

Materials Needed

Step 1: Familiarize yourself with the alarm. While it may not seem to be the ideal time to be reading your owner’s manual, in many cases user error is the problem. Verify you are following the correct procedure to shut the alarm off.

Step 2: Start the car. Put the key in the ignition and try to start the car. Almost all alarms, both factory installed and aftermarket systems, will shut off and reset when the car is started.

person putting key into drivers side door

Step 3: Use your key to unlock the driver’s door. This will usually turn off and reset the alarm. In the event that the driver’s side door is already unlocked, lock the door and then unlock it again.

person pulling fuse out of fuse box

Step 4: Pull the fuse. A factory-installed alarm will have a fuse in the fuse box; pull the fuse to cut the circuit and shut down the alarm.

Look for the fuse box on the left hand side of the steering column. Fuse boxes usually have a fuse diagram on the lid of the fuse box.

Most alarm fuses have an alarm label on them. If the fuse is not labeled, consult your owner’s manual for the location of the alarm fuse.

  • Tip: Some vehicles have multiple fuse boxes - check your owner’s manual for the location of the various fuse boxes.

Remove the fuse. If the alarm shuts off, you have pulled the correct fuse. If the alarm doesn’t shut off, re-install the fuse and try another one until you find the correct fuse.

Once the alarm has shut down, reinstall the fuse and see if this resets the system. If the alarm starts up again, it is time to bring in a pro to repair it.

If the alarm system is an aftermarket item, look for the fuse in the engine compartment. Consult the owner’s manual if you cannot locate the fuse.

person disconnecting black negative terminal

Step 5: Disconnect the battery. This is a last resort, as it will reset all of the electrical systems in the vehicle and your vehicle will not start until the battery is reconnected.

Disconnect the negative terminal (the black one) from your battery. The alarm should shut off immediately.

Wait a minute or two and reconnect the battery. Hopefully, the alarm has reset and will not start up again. If it does, try removing the battery cable again.

  • Tip: If this does not work, leave the battery cable disconnected and contact a mechanic or alarm installer to repair the system.

Step 6: Maintain your key fob. Most modern cars use a key fob to lock and unlock the doors and shut off your alarm. Unfortunately, the fob will not work if the batteries are dead, or it is simply not working.

Hopefully, if you’ve tried the above steps, the alarm has stopped shrieking and all of the dirty looks from the neighbors have stopped. If it was necessary to unhook the battery to stop the alarm, a professional mechanic, such as one from YourMechanic, should inspect the entire system to make sure everything works normally.


Next Step

Schedule Check Electrical Equipment

The most popular service booked by readers of this article is Check Electrical Equipment. 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 Check Electrical Equipment reviews

Excellent Rating

(16)

Rating Summary
15
0
0
0
1
15
0
0
0
1

Enrique

21 years of experience
244 reviews
Enrique
21 years of experience
Pontiac Torrent V6-3.4L - Check Electrical Equipment - Davenport, Florida
Great service again, thanks Ricky.
Suzuki Forenza - Check Electrical Equipment - Orlando, Florida
Enrique is always more than helpful and very friendly! He knows how to get the job done.

John

27 years of experience
1019 reviews
John
27 years of experience
Chevrolet Impala V6-3.8L - Check Electrical Equipment - La Marque, Texas
John knew exactly what was wrong with our car and saved us the headaches and wallet aches that I'm sure a shop would have put us through! He was prompt, knowledgeable and did a fantastic job. We won't hesitate to call on him again! Thank you, John!
Jeep Wrangler - Car is not starting - Friendswood, Texas
Extremely knowledgeable and honest. Will definitely utilize his skills again.

Ruben

14 years of experience
86 reviews
Ruben
14 years of experience
Jeep Liberty V6-3.7L - Check Electrical Equipment - West Hollywood, California
Rubens was very helpful. Thanks Ruben!

Ira

36 years of experience
259 reviews
Ira
36 years of experience
Saturn Ion L4-2.2L - Check Electrical Equipment - Tampa, Florida
He diagnosed the problem and will be coming back to do the work. Very knowledgeable

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 Install a Car Alarm
Whether you just bought a used vehicle without an alarm or just decided to opt for the extra security, installing an alarm system into your car is never a bad idea. There are a number of practical benefits, and in...
How to Program the Key Fob for Your Honda or Acura
Over Over time, it has become a convenience for us to have remote controls for different functions of our vehicles. Remote keyless entry is the most common, but many vehicles also have remote engine starting. We have become so accustomed...
How to Replace a Key Fob Battery
Key fobs allow easy access to your car. Once the key fob battery is weak or dead you'll lose your fob's ability to control remote functions.

Related questions

Door locks not working.
Hello, I would advise you to first check and see if you have a blown fuse for the power door locks. If the fuse is good then you will need the aid of a mechanic who can removed the door...
Security system malfunctioning
Your security system is likely controlled by a control module or computer of some kind. Considering that you say the alarm has a mind of its own, this may be a computer issue and will likely require scan tools for...
Alarm goes off randomly once or twice daily
Hi there. Deciding to replace or repair your vehicle is a decision you'll have to make. From the description you have provided, it may be that the only problem is a bad battery (https://www.yourmechanic.com/services/battery-replacement). When a battery has a sulfur...

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