How to Repair/Replace A Broken Car Central Locking System

How to Repair/Replace A Broken Car Central Locking System
How to Repair/Replace A Broken Car Central Locking System

A car with a central locking system is quite convenient. But there could be times when the system is down for maintenance. The article gives suggestions for dealing with the problem at hand.

People are always looking for solutions to simplify their daily activities because our schedules are getting busier and busier. Mechanics invented a technology that lets us swiftly unlock and lock our cars a long time ago. This feature is known as “central locking” in vehicles. This device allows the driver to easily lock and unlock all doors in the car. If you’re always on the move and never have enough time to seek for your vehicle, you’ll appreciate the convenience of a central locking system that includes an alarm to assist you locate your car in a crowded parking garage or lot.

What is a car central locking system?

To sum up, the keyless entry and ignition system in a car relies on a remote control to manage who has access to the vehicle. It’s multifunctional, and among its uses is allowing drivers to lock and unlock their cars without touching them. Several other functions include opening the trunk and bonnet, applying the brakes, and starting the engine. Most cars provide central locking systems as a paid option. The electrical components, door lock actuators, and remote control that make up a car’s central locking system are the bare minimum requirements for a fully functional system. There might also be hood, trunk, and door assemblies available.

Why is your car central locking system not working?

Like most other things, the central locking system can break down. There are numerous causes that could result in a central locking system failure in a vehicle. Common culprits include:

  1. When your car’s battery dies or ceases functioning properly, every electronic component will need to be powered by an alternative means. Consequently, you should check your car’s battery to ensure it is in good working order. An inoperative battery could also result in a variety of complications.
  2. If the key fob’s battery is dead or malfunctioning, the electrics that operate the central locking mechanism will be rendered ineffective. Because the batteries in the key fobs last so long, some drivers may forget they have one. This is actually one of the most common reasons why a car lock won’t work. It’s as simple as changing the batteries in the key chain remote. However, if a fresh battery doesn’t solve the problem, you should call the dealership to have the key fob tested further.
  3. The fuse may be blown if all but one of the doors opens and closes normally. Replacement of the fuse is a cheap and easy solution to the problem.
  4. One door doesn’t open while the others do is another symptom of a bad solenoid, which can also cause the problem described before. However, swapping out a solenoid is more of a time and effort commitment than, say, replacing a fuse.
  5. A dead battery isn’t as prevalent as a damaged cable being the cause of a car’s central locking system not working.
  6. Jammed or poorly greased locks are two potential problems.

How to repair a broken car central locking system

There are other methods you can attempt if the ones described above don’t work to fix your car’s central locking system.

  1. Eventually, your car’s battery will fail and need to be replaced.
  2. The dealer’s diagnostic tests may fail to find the problem if the key fob is defective, in which case it can be replaced.
  3. You shouldn’t assume anything; instead, you should check to see if all of the doors are working. If issues persist, it is advisable to check the wiring and fix any damaged wires. If there isn’t a bare wire, a blown fuse may be to blame, and replacing it will solve the problem. However, if a solenoid fails, it needs to be repaired immediately.
  4. Spraying lubricant may assist unlock locks that “try” to move despite being jammed. Always use the recommended motor oil. Wait a few minutes before touching the locks again after spraying the liquid on them.
  5. If you plan on leaving your car in an extremely cold area, heating the locks can keep them from freezing and becoming stuck. Either a hair dryer or a lighter can do the trick if you want to get heated.

How to install a new car central locking system

Installing or replacing your automobile’s central locking system is best left to a professional garage, car dealer, or mechanic. In any case, if you want to make some modifications to your automobile, this little essay will show you the ropes when it comes to installing a car central locking system.

  1. Remove the trim
    First, remove the molding by unclipping the panels and rotating the winders in a counterclockwise direction. After that, you need to carefully peel away the condensation layer from the molding.
  2. Position the car locking system drives unit
    The door’s opening mechanism and the pane of glass are not impeded by the drive unit because it is installed within the door’s inner skin.
  3. Make some holes on your car and secure the drive unit
    Select the proper size drill and mark the screw’s placement before beginning. After that, secure the bracket to the door by screwing it in place, and then attach the clips to the back of the door panel. Next, make sure the engine is securely fastened.
  4. Route wiring and wiring the central locking
    Assembly instructions detailing each individual step are included in the kit’s box.


A central locking system is a must-have for any vehicle because of how convenient it is to unlock the car with the press of a button on the key fob. The problem is that eventually its electrical and other components will break down. In certain cases, it fails to work properly from the get-go. Therefore, keep the tips in this article in mind if you ever run into the problem. You may need to replace them, and you can do it yourself or have a mechanic do it.

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