How To Reset Anti Theft System Cadillac Deville

A car anti-theft system is highly effective in protecting cars from getting stolen and other suspicious activities. But the downside of this system is that sometimes the anti-theft alarm goes off without any threat or may not start. The owners of Cadillac Devilles often face this issue. That’s why it is essential to know how to reset the anti-theft system Cadillac Deville.

The easiest way to reset the anti-theft system in the Cadillac Deville is to close all the doors first with the physical key. Then enter the car and put the key in the ignition. Move the key to the off-and-on position twice without starting the Cadillac. If the security light pops, the anti-theft system is successfully reset.

You may need to reset the Cadillac Deville anti-theft system for various reasons. Whatever it is, learning how to do it in more than one way can come in handy. I have explained everything on this topic in today’s article. So let’s not waste any more time and go to the point.

How To Reset Anti Theft System Cadillac Deville?

If you need to reset your Cadillac Deville’s anti-theft system, do not sweat on it. The process is pretty simple. There are a few ways to do that, but you can do it in two simple ways:

Closing Doors
Reconnecting The Fuse

Method One: Resetting Anti Theft System By Closing Doors

It is the simplest and quickest process to reset the anti-theft system effectively. Honestly, almost all anti-theft system users know this trick. But if you don’t know this already, here is how you can do it.

Step 1: Close The Doors

You already have the physical key to your car. Lock all the doors using the key. Make sure to check if they have been locked properly.

Step 2: Unlock The Driver Side Door

After locking all the doors, use the key again to unlock the driver-side door. You do not need to unlock other doors. Once you have unlocked the door, get inside your vehicle.

Step 3: Put The Key In Ignition

Put the vehicle key in your Cadillac’s ignition. Then turn the key to the ON position first and then turn it to the OFF position. You need to do it twice, but without starting the car.

Step 4: Wait For The Security Light To Pop

If you have done the previous steps correctly, you will notice that the security light is popping. If it does, you have successfully reset your Cadillac Deville’s anti-theft system.

The door closing process usually works for most people. But if that fails for you, which is unlikely, you can keep the key in the ignition in the on position for ten minutes and then in the off position for ten minutes. Doing it two or three times will flash the service light, meaning you can start the car.

Method Two: Reseting Anti Theft System By Reconnecting The Fuse

Now, this process is very little known by car owners. But this process is known by mechanical experts. Nevertheless, you can try this method if the other method does not work for you.

Step 1: Start The Car

Unlike locking the door in the previous method, you need to begin this process by starting your car. Then walk to your car hood.

Step 2: Find The Fuse Box

Open your car hood and get to the fuse box. You are likely to spot it on your left-hand side under the hood. If you have found it, open the box.

Step 3: Find The CTS/ECM Fuse

You will notice several diagrams on the lid of the fuse box. There you need to find the CTS or the ECM fuse. It is the name used for the anti-theft fuse.

Want to find the fuse quickly? In Cadillac Deville, you will find this fuse on the eighth position from bottom to up.

Step 4: Reconnect The ECM Fuse

This is the final stage to reconnect the fuse. But before that, you need to disconnect it.

Once you have spotted the ECM or anti-theft fuse, disconnect it and reconnect it. Do the same one more time, and it will reset the anti-theft system.

Both of these methods are known to be effective by users and Cadillac mechanics. I believe they will work out for you too. If for any reason, you don’t find any luck resetting the car in these ways, you need to take your vehicle for Cadillac service.

What To Do When An Anti Theft System Does Not Start?

The anti-theft system can come with certain drawbacks. And the most common one is the car not starting.

But why does it happen, and is there a way to fix this issue? Let me explain!

When your Cadillac Deville’s anti-theft mode is on, it will interrupt the power supply when it detects any suspicious activity. Thus, it immobilizes the engine and prevents the car from starting.

The good thing is this situation is fixable. If the security system does not let your car start, you can try various methods. Here are a few such tips that you can follow.

If You Are Inside The Car

When you are inside the car, and the security light is ON on the dashboard, start the ignition by inserting the key. Then turn the key slightly to the right and wait for around 10 minutes. If it turns off the dashboard light, you can start your car.

If You Are Outside The Car

If you are outside the car, lock and unlock the car door with the physical key and wait a moment. It will help the security system identify that the original key has been used. In some cases, you may need to do it a few times before starting the car.

Check The Key

That innocent-looking car key can be the culprit sometimes. It contains a chip that sends code to the alarm system if it gets suspicious. It can also happen if the key is broken or damaged.

In that case, you can use the spare key. If that does not work, start the engine with the key and wait ten minutes.

If the security light turns off, you need to turn off the ignition. Wait for at least twenty seconds before starting the car.

Key And Steering Wheel Trick

Sometimes, the anti-theft system locks your car’s steering wheel if you turn it after turning off the car. It also prevents you from turning the key inside the ignition.

If that happens, try moving the steering wheel in the opposite direction while trying to turn the key. At one point, the lock will give away, and you will be able to start the car.

FAQs About Reset Anti Theft System

Is Resetting The Anti-Theft System Different In Every Model Of Cadillac DeVille?

Almost all Cadillac Deville cars have the same anti-theft system’s resetting process. If you have knowledge and experience with one model, you can easily handle the others.

Is There Any Relationship Between Anti-Theft And Car Starting?

There is hardly any connection between these two. However, it is not uncommon for the car not to start because of the anti-theft alarm. But it is not something you cannot fix by yourself.

Why Is My Cadillac Anti-Theft System Not Working?

Vehicle anti-theft alarm systems do not always go off when someone is trying to break in. sometimes, when you bump the steering wheel too much when turning off the car. It will lock the steering wheel and make it impossible to start the car without turning off the system.

On the other hand, an anti-theft system can also go off if something or someone pumps it into it. But it does not mean the system is faulty. It is just an accidental situation, which shows the safety system is still active.

How Do I Avoid Setting Off My Car Alarm By Accident?

The best way to ensure the car alarm does not go off by accident is to lock the door using the transmitter once the car is vacant. Always ensure to use the transmitter to lock the doors to prevent setting off the alarm in any other way.

How To Turn Off The Car Alarm Without Having A Remote?

To turn off the car alarm without a remote, you need to put the key to the driver-side door’s lock and turn. If that does not set off the alarm, get inside the vehicle and turn the key inside the ignition. After that, starting the car will turn off the alarm system.

Video on How to Bypass Cadillac Anti-Theft System

Final Words

The anti-theft system is reliable and keeps your car safe. But unfortunately, this system can end up creating minor issues like going off without reason, not going off at all, or preventing the car from starting. That’s why knowing how to reset anti theft system Cadillac Deville comes in handy.

The easiest way is the first method I have provided in this article. This method does the trick almost all the time.

But exceptions can happen, and that’s when you can try the other method and tricks. And if nothing works, your last option is to seek help from professionals.