Manufacturers of car alarms pay a lot of attention to systems for protection against radio interference, remote monitoring, scanning of chip keys, etc. These measures help protect the security complex directly from hacking. The owner may also encounter problems with access to the machine for a simple reason - as a result of the termination of its power supply. This can happen if the battery is dead. How to open the car in this case? There may be several options for action. The choice of a particular solution depends on many factors, which will be discussed in more detail below.
The reasons for the "landing" of the battery
The battery pack can cease to function both due to the consumption of energy resource, and as a result of breakdown or external influences. In the first case, it will not be possible to restore the block's potential without a full charge, but such cases are rare. Even for a week, an abandoned car with a modern battery should provide voltage. Another thing is that when leaving on vacation, many motorists deliberately remove the terminals from the unit, stopping power supply. In this case, it is important to make sure that arming the machine will not lead to loss of access due to lack of power.
The situation with the causes of the second kind is much more complicated. How to open the car door if the battery is dead due to freezing or breakage? It remains to use alternative ways of access to communications and car mechanics. But before considering such options, it is important to find out exactly how the traditional key can be associated with the battery.
How is the mechanical lock connected to the electrical network of the machine?
It has already been said that the closest connection can take place if there is an alarm that is powered by a battery and blocks the door. Moreover, in some versions it also controls access to the hood with the trunk and windows. That is, the owner of the car will have to feel like a real car thief. Moreover, for the organization of communication "key-network" does not have to be installed a separate alarm.
Modern cars functionally offer the option of communication between electronics and a mechanical lock. In this case, all door manipulations are performed using a key fob with an electronic chip. Therefore, such car owners may well come up with similar questions in practice: the car is on an alarm, the battery is dead - how to open it?
It should be noted right away that the most effective way is to use physical hacking. But it is worth contacting in extreme cases, after evaluating the possibility of softer means of access.
Power recovery through a generator
A fairly simple way, but to implement it you need a set of appropriate tools. Among them are the following: a jack, a working battery (from another car), a backup and wiring. The principle of solving the problem will be to restore power, after which it will be possible to turn off the alarm and unlock the car door with a key. To do this, the car rises with a jack and is mounted on a support. It should be noted here that it is dangerous to perform these actions alone, therefore it is better to take care of your partner in advance, not to mention additional means of body insurance. How to open the car if the battery is dead with this scheme?
After installing the machine on a backup, you will need to get to the generator, and then find the output for the battery pack. Connect one end of the wire to this connector and the other to a pre-prepared battery. The channel must be positive, and the negative will be hooked to the mass of the car. Then it remains only to correctly use the alarm disarming scheme and open the door in the usual way.
Providing access through an immobilizer
This solution to the problem may work if a certain scheme for providing access through the immobilizer was arranged in advance. Stopping the alarm while preserving the shut-off function will not be relevant if the immobilizer lock is displayed in the first place. Its task is to terminate remote and mechanical access without an appropriate signal to the chip.
The advantage of this solution is that this blocker can initially be supplied with its own autonomous power system. For example, a lithium-ion compact battery is often used, which continues to operate regardless of the state of the automotive electrical system. It is this option of organizing access control that can help if the battery is dead. How to open a car using an immobilizer? To do this, it is enough to use the complete key, which was synchronized with the immobilizer chip.
Using air bags
This is a small pear-shaped pillow that is filled with air like a compressor. In order to gain access to the machine with its help, it should be inserted into the gap between the door and the body. This gap is important in terms of a mechanical shutter that can be unlocked if the battery is depleted. How to open the car with an air bag? The principle of operation is that as the pumping already introduced the cushion canvas will increase the gap. Further, using the wire, you can pry the door handle and open it.
If it's not about the battery?
It is difficult to find out if the battery really has sat down, causing the door to completely lock, without penetrating the interior. The same alarm may cease to be valid for reasons not related to the power grid. And even if you can’t open the car with a dead battery, the reason for this does not have to be power. It is possible that the mechanics stopped responding due to corrosion of the castle itself. In this case, you need to use WD tools. These are lubricating liquids with increased penetrating power. The oil will penetrate the larva, lubricate its parts and clean the key input channels.
other methods
If all of the above methods did not give a result, then you can return to the means of mechanical hacking. A method of breaking a window has already been noted, but there is a more sparing and economical option. Using a drill, “work through” the key lock, which will make it possible to enter the cabin if the battery is dead.
How to open the car, if the cabin provides additional anti-theft mechanisms? In such circumstances, you can act through the hood, but only on condition that it becomes possible to replenish the battery's energy - otherwise this way of bypassing the lock will not work.
Finally
In the case of electrical locks on the machine, the initial configuration of the disarming methods is very important. They need to be worked out while the car with its communications is fully controlled. Provided that the alarm is correctly configured, the question of how to open the car with a key, if the battery is dead, should not arise at all. Mechanical resistance must still be left independent. Those who expect to further increase its reliability, it is better to provide the same physical stoppers and blockers inside the cabin. As for the key fob with an electronic key, its role should also be independent and strictly defined. Optimally, if the keychain interacts with both the immobilizer and the local alarm.