How to open the car if the battery has sat down

It is not a secret to anyone that the battery in a car is a thing that is not durable: it tends to gradually deteriorate and be discharged, especially in the case of long standstill (especially for those batteries that have already worked 2/3 of the useful life) . Thus, in 3 weeks, the charge of almost any battery can drop to zero, which, in turn, will make it impossible to open the car using the standard method due to the existing car security system.

Obviously, if the car does not respond to the remote control signal, and the alarm is still on, you can try to open the door with a normal key. However, there is one “but”: if before that the machine was opened exclusively with the help of a key fob, then this method may not work due to nitrous or clogged larvae of the lock.

Tip: to avoid such a situation, it is recommended to open the car with a regular key at least twice a month. This will help prevent the development of oxidative processes in the future.

But it’s not worthwhile to call the maintenance services in a panic attack, because you can open a car with a dead battery using several methods, which can be divided into three groups:

• The method of external voltage supply to the battery, located under the hood of the car;
• The method of external power supply to the voltage generator;
• Emergency methods.

Each of the methods belonging to one group or another differs in the approach to opening the car, but they are not universal, since the security systems of all car brands differ in their design.

External voltage supply to the battery

Obviously, in order to apply external voltage to the battery, located under the hood, it must be in some way open. For these purposes, a wedge pump is used, or, as this device is called in Russia, a pneumatic cushion with manual air pumping. In addition to it, you will also need:

• Copper wires with a cross section of 2 mm2 as long as possible (usually 1.5-2 meters);
• Portable or spare battery or other power source.

As soon as it was possible to connect the positive lead to the positive of the battery, it must be connected to the plus of the external power source, without forgetting to divert the negative to the mass of the machine (usually connected to an unpainted wheel nut). After the external power supply voltage, the car will be possible to start, and the battery - to charge.

Tip: you should always carefully check the correct connection of the positive and negative wires; a single mistake can lead to fatal consequences! If the pneumatic cushion is inflated to the maximum state, and plus and minus cannot be distinguished, you can use the camera on your smartphone.

External voltage supply to the generator

If, for any reason, it is impossible to lift the hood with a pneumatic cushion on a vehicle, it is possible to supply power from the outside to the generator; This option works in 95% of cases. To apply voltage, you must have:

• Jack and stand under the car;
• Portable battery or other external power source;
• Copper wires with a cross section of 2 mm2 as long as possible (usually 1.5-2 meters);
• Set of wrenches.

The first action will be lifting the car with a jack and special supports under it. Tearing off the front wheels from the ground is absolutely necessary, just a small gap is enough to make it possible to crawl under the hood.

Tip: it is important to always use a jack stand (as a last resort, ordinary wooden bars may be suitable). Their non-use, especially if the car is on an uneven surface, is dangerous to health and life!

After the front of the car is raised, and it generally stands firmly on the jack, you should crawl under the hood and remove the engine protective boxes with a wrench, as they block free access to the generator.Next, you need to find again the output where you can attach the positive wire from an external power source; minus is displayed on the car body.

Then you should gently lower the car back and try to start the car using the remote control.

Emergency car opening methods

The use of emergency methods of opening the car is not recommended, because in most cases they entail damage to or complete breakdown of any components of the car and, as a result, subsequent repair.

The first way is to use a thin wire (or thread) as a pulling tool, with which you need to hook on the handle opening the door inside. This method is suitable mainly for old models of domestic cars (until 2014 release).

The essence is simple: on a wire or thread, which must be gently pushed into the gap between the door and the body of the car, you should make a small size loop: it should pick up the handle up.If you can not push the thread, you can again use a pneumatic cushion.

If the door still does not open, even though the handle is in the upper position, you can hook the hood opening lever with an eyelet, which in some cars (for example, Chevrolet Aveo) is located below the driver’s seat.

The second method already uses, as an element for opening the hood, not a lever located in the cabin, but a lead cable located near the grille. This method does not require the use of a pneumatic cushion. Since the hood cable is usually either along one of the wings, or in the immediate vicinity of the grille, it can be just like a wire, just like in the previous method.

Advice: it is obvious that the intruders are aware of the two methods described, therefore one should rule out the possibility of performing such tricks by third parties in advance by constructing an individual defense.

The third method partially repeats the ones listed above and consists in using a metal ruler (a wooden one will quickly break) as the main tool for loosening the lock.From the outer side of the window, the seal is removed, and the ruler is pushed into the resulting gap in order to push the cravings. Again, this method is suitable for outdated domestic cars.

If the methods described above, although conditionally refer to emergency, carry damage of a local nature (for example, sealing window gum or hood cable), then the following is not recommended at all - it will be cheaper to call a brigade from a service center than to pay for repair or replacement of a part .

So, the easiest way to open the door using the “barbaric” method is to break the driver's glass with a hammer or other heavy object. In some cases, desperate car owners use a fist for such purposes, completely forgetting about security measures. If you need to get inside the car so urgently, you should first wrap the fist in any piece of fabric, wrapping the brush as tightly as possible.

Tip: on the windows of some cars there is a "window", which is relatively small in size and costs much less than the whole window. Obviously, it is better to break the window.

It is also possible to use spacers wedges for emergency opening of the car, which, diverging to the sides from the inside, force the door to obey and open. Such a method is likely to entail a break in the castle's larvae and, as a result, the subsequent repair of the entire security system of the vehicle.

In general, in order not to have to resort to any non-standard method of opening the car, you should always carefully monitor the battery charge and not allow it to fully discharge. To do this, just need:

1. Warm up the engine completely at least twice a month in case of a long parking of the car.
2. If there is a possibility, then simply completely disconnect all electronic systems of the car for the idle time.
3. Turn off dimensions, rear lights and music.
4. Regularly check the battery charge with a multimeter.

It is recommended to change the battery in the car every 3-4 years - this will additionally warn the possibility of its discharge. It should be remembered that the frequent use of external power sources adversely affects the overall performance of the car battery.

Video: how to open the car if the battery has sat down (Range Rover)