Central lock control unit. Central locking - a device in front of which all doors open

The central lock is a mechanism that operates according to the electromechanical principle of operation. The process of connecting a central locking car to a security complex is a rather difficult task, which not every motorist can do. Therefore, in order to properly connect the alarm to the central lock, many motorists turn to service stations.

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Central lock design

Structurally, the central lock consists of the following elements:

1. The main module of the system, in fact, its center. It is used to ensure the smooth operation of all lock products.
2. Control buttons, as well as controllers of the security complex connected to the lock.
3. Drive devices. Depending on the machine and model of the central lock, they can be pneumatic or electric.

Preparing to connect a car alarm

To ensure the process of remotely turning on and off the locks in Renault Duster, Mitsubishi and other brands, you must first find the signaling access points. It is advisable to entrust the search for these elements to qualified specialists with experience in electrical engineering. Connection points are always marked in the schemes for security systems, as well as in the wiring diagrams for cars.

Security complexes are connected to locks by means of switching devices through electrical circuits. On passenger cars, control modules with connection points are mounted in specially designated places. Depending on the brand of car, the location of the elements will be different. But specialists usually know the place of their installation. But in new domestic cars, central locking control units are often installed under the center console to the right of the gas pedal.

The Technomania channel talked about connecting the central lock to the security complex in the car.

Connection of "signaling" depending on the type of central lock

Proper installation of relay connections and electrical circuits when connecting an alarm system should ensure synchronous operation of security systems.

Depending on the type of lock product, the installation and connection of the security complex will take place in different ways. Before performing the connection procedure, you must find the signal circuits.

To do this, you should understand the types of control modules for the central lock:

1. Block with negative polarity. When you close one of the signal contacts to ground, the locks will automatically close. Their opening is carried out by shorting the second contact to the ground.
2. The module is controlled by positive polarity. In this case, the procedure for opening and closing the doors is carried out similarly. Only +12 volts is applied to each of the contacts.
3. The module can work with a variable signal. One output of the device is connected to ground to the body, and 12 volts is supplied to the other. This will unlock the locks. When the polarity is changed, the devices are closed. If the voltage is supplied to the contacts separately, this will not affect the functioning of the devices in any way.

For the first case, you can find a way out using a control light. The light indicator is connected to the mass of the machine, that is, its body, after which each output is diagnosed separately. If you need to find a positive output, then the test lamp is connected to the positive contact.

CZ with negative polarity

Scheme for connecting the central lock with a negative potential

The outputs of the security complex used for central locking are divided into power and signal ones. If we are talking about a device with a negative polarity, then relays will be used for the connection. This refers to the elements with which you can unlock and close locks.

You can connect the alarm to the central lock in accordance with the diagram below:

1. The green contact is connected to the connector of the security complex. It is used to close door locks.
2. The white output also goes to the "signaling" block, designed to open locks.

In accordance with the diagram, the upper node of the system is made in the form of a closing relay. Open contact components are connected to ground, the car body. And the common outputs must be connected to the signal contacts of the locking device. Please note that you do not need to cut the cables from the processor module plug, you need to connect the outputs to them, which we described above.

In some models of security systems, not relay contact components are used as outputs, but low-current signal channels.

CZ with positive polarity

The connection diagram will look identical. Only normally open contact elements should not be connected to the vehicle body, but to the positive terminal. The upper relay is a locking relay, and the lower device is designed to open door locks. Signal contacts can be used instead of these components. But with such a scheme, the diode elements should point to the lock plug.

CZ with polarity reversal

Scheme for connecting a central lock with reverse polarity

A locking device operating with a variable potential is the most difficult to connect. The central lock processor must include a relay in its circuit. Two contact elements connected from the plug of the lock module to the actuators must be connected to the “signaling” plug. We are talking about the contacts located in the middle. When performing this task, it is important not to mix up the wires. When the upper relay is activated, the locks should close, and not vice versa.

The main features of this scheme:

1. A positive pulse is applied to contact number 1 when the central lock is unlocked, and a negative pulse is applied to component number 2.
2. When forced to open, the schema changes. The first output is grounded, and the second contact receives a positive pulse.
3. After connecting the components in accordance with the diagram, the contacts under the first and second numbers do not come into contact with the plug of the central lock control processor. This moment can be called a disadvantage, since the car owner will have to intervene in the standard wiring and break the connection.

Reverse polarity lock control is more relevant on US-made machines, and not on all models. And security systems, which are equipped not with relays, but with control devices, are not manufactured today.

Oleg 1974 spoke about the connection of the central lock to the block of the security complex.

Central locking with pneumoelectric compressor

Let's analyze an example of connecting the complex to a pneumatic locking device using the example of a Mercedes-Benz model in the 124th body. The car can be equipped with an immobilizer or work without a powertrain lock. This car model has a traditional compressor device, as well as pneumatic type actuators. On the doors of the car and in the lid of the luggage compartment, drives are mounted, equipped with switches, each with three contacts.

Circuit elements:

• accumulator battery;
• contact component of the ignition lock;
• module with safety elements;
• connecting device;
• buzzer switch;
• CZ processor unit with an installed compressor;
• contact component of the lock product drive on the front door on the right;
• contact component of the drive device of the tailgate;
• contact component of the drive mechanism of the driver's door lock.

The principle of operation of the circuit is simple - when the lock devices are unlocked, the electrical circuits on the contacts of the drive devices are closed. In accordance with our scheme, these are elements numbered 7, 8 and 9. When a mechanical action occurs on the stem, the lock is blocked, and the power cable closes to the ground. Such a development of events is carried out when the key is turned in the lock or after pressing the rod with a plastic tip. The module will respond to potential changes. When one door is locked, the remaining mechanisms are closed by activating an electric motor with a pumping device. The latter pumps air out of the drive elements, this leads to the inclusion of all rods and the closing of the locks.

1. Wiring diagram of the central locking Mercedes-Benz 2. Pneumatic device control scheme

When the locks are opened with a key, the control element is closed to +12 volts. The compressor mechanism is activated, as a result of which air is pumped into the drives, and the rods extend. This causes all locks to close. To connect such a mechanism, it is necessary to find a control drive in the machine, there are three in total. This component is cut, after which two outputs from the security complex are connected to it in accordance with the diagram. We recommend using the contact from the driver's door as it goes under the left sill trim.

The contact elements of the relay of the security complex are connected according to the above diagram. With its implementation, you will be able to make the pulses from the driver's door to the compressor device pass unhindered, the transmission will be carried out through the contact elements of the relay. This will allow you not to interfere with the operation of the pneumatic component. When arming, the relay will be activated, causing the common output of the device to open with a normally closed component. This will break the control circuit from the door. The relay's common contact will then close to the normally closed component. Such actions lead to the closing of the door lock, the command is carried out by the compressor device.

When connecting an alarm, you need to remember that the main feature of the central locking pneumatic system is its inertia.

Because of this, it may take up to three seconds for her to have time to close all door locks and contact elements of the control circuits. During this time, these components should switch to a negative output. Therefore, the alarm system relay must be held for the duration of this task in order for the entire procedure to proceed correctly. It is necessary that the pulse transmission time be 4 seconds. Almost all modern security systems have this function, if you have any difficulties with setting it up, we recommend that you refer to the instruction manual.

If you do not do this, then after the “signaling” relay switches to its original position, the electrical circuit between the compressor device and the control cable will be restored. If during this time the lock product does not have time to close, then there will be a plus on the main wire, respectively, the compressor mechanism will execute the command to open. As a result, the security complex activates the protective mode, but the car doors will not be locked.

SamodelTV channel spoke about connecting a security complex to a pneumatic lock using the example of an Audi car.

Which is better: alarm or central locking?

The central lock is usually used as a regular security device. It cannot provide full protection for the car, unlike the alarm. If there is only a central lock, an attacker can break a window and steal a car without hindrance by closing the contacts on the starter or ignition switch. As a result of the lack of a siren, the criminal will have enough time to hijack.

The presence of an alarm provides the following advantages for the car owner:

1. Reliable machine protection. The diode status indicator will warn about the presence of a "signal" of the criminal. An attacker may be frightened and not even try to break into a car.
2. . Many modern security systems have the function of blocking the power unit. If the criminal manages to gain access to the interior of the car and turn off the siren, when trying to start the engine will be blocked. It will be impossible to drive a car, it will not work to steal it.
3. The car owner will be aware of the car's protection status. All modern complexes have a feedback function. Its essence lies in the fact that the status of the machine is displayed on the pager with the screen. The display shows which defense zones are enabled. And if someone tries to break into the car and an alarm is triggered, the car owner will be alerted by sending a sound signal and a message to the remote control.
4. The presence of an alarm makes the procedure for controlling the machine more convenient. All modern complexes are equipped with good functionality. For example, you can set up a remote start of the engine by time or by command. Central locking cannot provide this.

Here we will consider how to repair the central lock installed in the car, more precisely, the lock control module. More often in publications, this module is designated as follows: “BU TsZ”, which means “central lock control unit”. It, as you can easily see, is a miniature box equipped with one connector with 6 or 8 pins. And although the cost of such blocks often does not exceed 300 rubles, there is no need to rush to replace them. Inside the case, you can find valuable details - this is a pair of relays that switch a current of 20 Amperes. If the repair is not successful, at least the relay can be unsoldered.

Varieties of BU CZ and connection

The control unit connector always contains 6 main contacts. Four of them are power (significant current flows through them), and two more are signal. "Ground" is connected to the signal wires, and the locks are unlocked or locked. Further, all this is considered in more detail.

BU CZ cars VAZ

If you see that more than 6 contacts are used, then you should not be surprised - all the rest of them are additional. By the way, control signals can go through additional contacts, in the absence of which it will be impossible to check the block.

Looking at the connection diagram of the VAZ-2110 central lock, you can once again make sure that the main contacts are always 6:

So the block is connected in the "Ten"

It is necessary to correctly determine what to connect the power to (in the figure, these are the pink and black conductors). Next, you need to find the conclusions going to the electric motors. Well, white and brown wires will often be control wires. When the brown cord is connected to ground, 12 volts are applied to the motors for 0.8 seconds, and the polarity of this voltage corresponds to “lock”. The white cord is responsible for "unlocking", and "mass" is never applied to both cords at once.

We disassemble the block, look for defects

Once again, we note that a significant amount of current can flow through the cords connected to the unit. We are talking about two supply wires, as well as conclusions connected to the motors. The approximate value of the current strength is 20 A (a maximum of 15 goes in the euro socket). And with such values, all parts are mounted on a textolite, which cannot but lead to the destruction of the "tracks".

BU CZ, printed circuit board

The foil track is covered with a layer of solder to increase its cross section. But, as you can see from the photo, ring cracks sometimes form as a result, breaking the connection between the track and the terminal. Such a defect is quickly corrected by soldering, but this is only the beginning.

Checking diodes that protect transistors

A DC relay cannot be used unless a diode is connected in parallel with the solenoid winding. This element, that is, the safety diode, is usually located next to the relay housing. So, it will be easy to find it.

Printed wiring BU CZ

Mode for testing semiconductors

When checking in one of the connection options, the display should show “1”, in the other - from 200 to 500 mV.

Suppose at least one of the diodes conducts current in both directions or does not conduct at all.

Then, in 99% of cases, you can do this: unsolder the relay and, with a clear conscience, throw away the block, or rather, what is left of it. The fact is that in the event of a breakdown or rupture of the diode, all transistors fail. However, you can give the unit one last chance: by installing serviceable parts to replace the old ones, you can check by connecting the unit “in place”. The value of the element called "diode" in this case is not important. The main thing is not to make a mistake with the polarity (it is indicated on the board).

Replacement of defective electrolytic capacitors

A part called a "condenser" is a cylinder with two outlets on one side. You can easily check the performance of the capacitor: just look at its cover and make sure that it has not lost its plane shape (not “swollen”). If the last condition is not met, the capacitor is replaced, observing the polarity of the connection.

Two parts need to be replaced

There are positive and negative conclusions, and on the imported part, the “minus” is indicated by a strip on the case.

When choosing new capacitors to replace faulty ones, the following requirements must not be violated:

1. Rated voltage must be 16 volts or more.
2. It is strictly forbidden to install a part with a larger capacity than provided: you will get a response time increased several times (instead of 0.8 seconds it will become 1.6). This will adversely affect the durability of the actuators mounted in the doors.
3. The size of the new part must match the printed circuit board. This requirement, oddly enough, is the most difficult to fulfill.

If you have repaired following the advice given here, check the unit for short circuits. Connect to the power terminal "Krona" from the tester (positive terminal), to the "ground" - negative. Try to apply a "minus" to each control wire - the relay should click. However, the last property is not typical for all blocks, but only for the most “primitive” ones. Usually, the control unit needs a lot of control voltages to operate.

This is how you can protect yourself from unpleasant consequences. Any control unit, even a faulty one, acts as a "buffer" between the battery and electric motors. If the repair is done with errors, you will get a non-working central lock (and even then, not always). And the actuators themselves, as it is easy to understand, will remain unharmed in any case.

All instruction on video

Connecting an alarm to the central lock is a rather complicated process, which is usually performed at car services. But if desired, this operation can be performed independently.

Connecting an alarm to the central lock - the main difficulties of the procedure

Today, motorists have the opportunity to choose any type of security system for their vehicle, focusing on their own needs and wishes.

But choosing the “most-most” alarm is half the battle. It still needs to be properly mounted and connected to the central lock.

Specific connection points of the security device are selected depending on the following factors:

• type of acquired alarm (without or with remote control);
• model of the vehicle on which the system is planned to be installed;
• the location of the main security mechanism (block).

Before starting work, you need to decide on the type (CL) of your car. The most common types of CZs are:

• controlled by a positive impulse;
• driven by negative impulse;
• with variable polarity.

Connecting an alarm to the central lock with a negative and positive impulse

In this case, when a “minus” is applied to a pair of lock wires, they close or open. Finding such wires is relatively easy with a probe (tube). It is necessary to alternately close the wiring that exits the car doors from the driver's side. As soon as the right pair of wires is found (the door opens or closes), the problem can be considered solved.

In those cases when it was not possible to find the wires, you will have to "dig" in the central locking unit. It will need to find a special relay in it that is responsible for closing / opening doors, and then solder the security system wiring into it.

Working with a lock controlled by a "positive" pulse is similar to the scheme described above. Only the right pair of wires in this case, as you yourself understand, will have a polarity with a plus sign. In other words, positive wires should leave the alarm.

Connection diagrams for voiced types of central locking with a built-in relay, therefore, will be as follows:

• “Negative” impulse: NC (normally closed) contacts are not needed, NO (normally open) contacts are connected to the “minus”, common contacts go to the control wires.
• "Plus" pulse: open contacts are connected to positive, closed contacts are not used, common ones, as in the previous version, are connected to the found control wiring.

Features of connecting the system to a lock with variable polarity

In this case, the car alarm should be connected directly to the power car wires, which are again searched for with a probe. First, with its help, a negative power wire is found (the device should be connected to the plus, and then press the corresponding button on the alarm, determining the required wire). Similarly, they are looking for another wire (power).

VAZ-2110 is an additional option, not included in every vehicle package. In fact, a fairly cheap mechanism, easy to install, repair and use, but with the slightest breakdown, the car owner faces difficulties. It is not very convenient to check whether the lock flags are lowered before each exit from the car. It is much easier to close all the locks by pressing one button on the alarm remote control or by turning the key in the driver's door cylinder.

Central locking on cars of the tenth family

The main function of the device is clear from the name: with its help, all car door locks are unlocked and locked simultaneously. The operation of this device can be carried out both in conjunction with a car alarm, and without it. The basis of the device is the VAZ-2110 central locking unit, which is a small circuit that includes several semiconductor elements and electromagnetic relays. Instead of the latter, not relays, but transistor power switches can be used.

Despite all the advantages of the central control of locks, you should not trust him completely, especially if certain sins were observed behind him. With minor failures, one or more locks may not be fully locked. The reason for this may be a malfunction of the electric motor, the gearbox included in its composition, or the control system. To carry out even minor repairs, you need to know the device and principle of operation of the central lock.

Main Components

The central lock (VAZ-2110) has the following components in its design:

1. Semiconductor control unit for electric drives.
2. Gearmotors act as motors (there are 4 in total - one for each lock, but if there is a drive to unlock the trunk, then five). These are small electric motors, on the rotors of which there are gearboxes.
3. allowing to determine the state of the lock (installed in a gearmotor mounted in the driver's door).
4. Wires, connections, fuse.

The central locking VAZ-2110 can operate in several modes:

1. The drive of all locks occurs when unlocking / locking the driver's door.
2. When arming and disarming the car alarm. Provided that the alarm and central locking control units are connected.
3. If there is a remote control function for the central lock from the key fob. Such control systems have a fairly low cost and can be used on cars without alarms.

The main causes of breakdowns of the central lock

If the central locking of the VAZ-2110 does not work, the reason for this is some defect in the actuators - gearmotors. In the entire structure, they are the most vulnerable point, since they are affected by the greatest load. These devices move during operation, which accelerates the production of elements included in their design.

But there is one important detail - the VAZ-2110 cars were discontinued more than ten years ago, which already indicates that any of the cars will have problems associated with the "obsolescence" of the elements. The wiring is destroyed, the gearmotors become unusable, even the transistors in the control unit can fail over such a period due to frequent overheating. Therefore, it is necessary to carefully study all the symptoms of breakdowns and methods for their elimination.

Central locking actuators

It is with their help that the central locking of the VAZ-2110 is controlled. They are mounted in the doors, have a plastic case. Flashbacks are rare, but they do happen. Especially if the device is subjected to a large load or the motor is often triggered. In the case of a physical defect (melting, destruction), the following symptoms appear:

1. On the door in which the defective activator is located, the unlocking / locking function stops working.
2. The fuse fails due to excessive loads on the supply circuit.

Causes of breakdowns of activators

Almost all components of the activators are made of plastic. It is strong enough to withstand heavy loads. But there is also a marriage, and a violation of the work of locks. In the latter case, there is a sharp increase in the load on the motor, the gears are able to collapse, disengage. The castle will buzz, but the flags will not be lowered (or not raised, depending on the current state).

But such a manifestation of breakdowns can also be caused by incorrect installation. This is only if work has been done relatively recently that directly or indirectly relates to the elements of the central lock. Violation of the adjustment of the rods is the first bell to the fact that the entire system will not work properly. The lock on which the adjustment is incorrect will not work, while the others function as they should.

central lock

Every motorist who has ever encountered him knows where the central lock (VAZ-2110) is located. It is located under the central part of the dashboard, right on the floor. It is quite simple to distinguish it: the block is made of plastic, a wiring harness with a block at the end fits it. Having removed the cover from the unit, you will see a small board in it with It is this unit that is responsible for the functioning of the entire system. And the reasons for the breakdown can be as follows:

1. In case of malfunctions of activators, an increase in the load on them, an increase in the current in the power circuit occurs. This leads to significant overloads, fuse failure, destruction of printed wiring tracks. With prolonged thermal loads, soldering is destroyed, the mounting legs of the elements lose electrical contact with the entire circuit.
2. Age plays a big role, therefore, over time, contacts in electromagnetic relays may be destroyed. Transistors are not eternal, with overloads they can also fail.
3. Burning the fuse leads to the fact that the whole circuit does not work - the central lock does not respond to anything. There is a fuse in a special rubberized or plastic case, in a break in the red (sometimes pink) wire. Please note that fuses of a higher rating cannot be installed, as this will lead to melting of the wiring and fire.
4. The plug connection of the control unit is one of the most vulnerable places. Next to it is a stove (a source of heat), and the driver's shoes, on which there may be dust, dirt, and water. All this together causes the appearance of oxidation on the block. You can get rid of it with the help of special solutions or sprays (WD-40 and the like). If the condition of the pad leaves much to be desired, it is easier to replace it completely.

Control unit electronics

The VAZ-2110 central lock circuit consists of semiconductors and electromagnetic relays. But the latter are not used in all models of central locking. After all, it is much more efficient to use them, they work on the principle of a relay, but there is no physical exertion. As a result, mechanical wear is completely eliminated. But the chance of breakdown of semiconductor elements is still present.

In the event of a breakdown of the central lock on the top ten, it will either be constantly set in motion, or it will completely cease to respond to actions. To check the operability of the control unit, it is necessary to connect alternately to the yellow and red wires of the driver's door gearmotor. Preferably directly on the connection block to the control unit. If the flags rise and fall normally, then there is no point in sinning for a breakdown of the electronics, you need to look for the reason in other components.

Breakdowns in the wiring

The next important element of the entire system is the wiring. The operation of the central lock depends on the condition in which it is. If there are frayed wires, cuts, then this will inevitably lead to either spontaneous operation of the activators, or to their inoperability. Most often, the wiring is destroyed at the bends - between the door and the body. To check the integrity, you need to carry out the continuity of each wire separately. Just do not forget to turn off the power, otherwise you will damage the multimeter.

Limit switch malfunctions

The limit switch allows the control system to understand what position (locked or unlocked) the door is currently in. With its help, a signal is given to unlock and lock on the VAZ-2110 central locking relay. In the event of destruction, such a pattern can be observed in which the signal for unlocking is received, but there is no signal for locking. To make repairs, you need to completely change the driver's door activator. These elements are not subject to repair, therefore, in case of breakdowns, only a complete replacement will help.

Connecting a car alarm to the lock is a time-consuming and difficult process, which is recommended to be carried out in a car service. Having a desire and having read this instruction, it is quite possible to do it yourself. A strong argument in favor of personally connecting a security device to the central lock is that, violating the installation algorithm adopted by professionals, it becomes much more difficult to break into a car.

Varieties of elements of the central lock

Central locks have a simple structure:

1. input sensors. These are lock microswitches and machine door limit switches. The microswitches determine the actual location of the central locking elements. Limit switches determine the location of the doors and send a message to the control unit.
2. Executive mechanisms(also called actuators). They are DC electrical machines that are connected to the converter. Pneumatic actuator may be used.
3. Control block. Acts as a transmitter of certain messages to the control units, as well as to the actuators of the trunk roof lock and to the gas tank hatch.

The scheme of the central lock in the car

Do-it-yourself car alarm connection

Security mechanisms are quickly installed in car services. Consider how to connect them yourself. This process has several parts. The result directly depends on whether you follow the instructions.

Before directly connecting the alarm to the central lock, you need to familiarize yourself with the structure of the lock itself. After that, we are looking for access points that are shown in the diagrams of instructions for using and installing the device on a vehicle. Alarms like starline a91 are universal, they are suitable for installation on cars with different types of engines (turbocharged, diesel or gasoline) with both automatic and manual transmissions.

Work materials

To install the alarm you will need:

• insulating tape;
• screwdriver;
• protective LED;
• driver's door activator;
• soldering iron (with rosin and solder);
• the alarm itself.

Important! Do not start the connection without first reading the theoretical material.

Step-by-step instruction

It is worth remembering that the methods of installing the security mechanism may differ from each other (most often it depends on the manufacturer). After all the materials have been collected and all the introductory information has been read, you can begin the installation.

1. Shock sensor connection. This stage is easy. The sensor is connected to the block through a switching connector with three pins (which is located on the right side from the bottom of the block body). Connect the LED indicator connector on the left side of the alarm unit housing. Connect the button to the contact located on the bottom of the alarm unit housing.
2. Central locking. We connect the yellow wire and the yellow wire with a black stripe to the positive terminal of the battery (“+”). We connect the orange wire and the orange wire with a black stripe to the negative terminal of the battery (“-”). Connect both remaining white wires to the central ignition lock actuator.
3. Signaling. Has 10 wires of different colors.

Video: connect the alarm

Consider their connection:

• yellow wire(uppermost) connect to the contacts of the relay power coil. Normally closed contacts of this relay are inserted into the place of the break in the power supply circuit of the ignition coil. You need to cut the cable that connects the relay power coil and the ignition switch. The ends formed after cutting must be connected to two relay contacts (green wires). Then, connect the wiring coming from the ignition switch to another contact of the relay coil;
• black wire you need to connect to the negative terminal of the battery (the orange and orange-black wires from the central lock are also connected to it);

  Important! It is necessary to disconnect the battery for the period of connection, so as not to damage the electrical wiring of the vehicle.

• both wires are brown connect to the turn signals (the first to the right side, the second, respectively, to the left);
• connect the pink wire to the siren (to its red wire). The black cable of the siren is connected to the housing or to the negative pole of the battery;
• red wiring connect to the positive terminal. The yellow and yellow-black wires of the central lock must be connected to it;
• green wire(also called "trunk opening minus"). To be able to implement this function, you need to install an additional relay and connect this wire to its supply coil;
• orange wire connect to the brake pedal switch;
• white wire (ACC) must be connected to the ignition lock (to the contact that closes when the key is turned, and the supply voltage appears on it);
• blue wire connect to the door limit switches.

What difficulties may arise and how to overcome them

The connection process is quite time-consuming, so users may experience some problems:

1. The problem of choice with a wide variety of security systems. Buyers, choosing an alarm system, first of all, should be guided by their wishes and ideas about the functional features of this device.
2. Installation of a car alarm to the central locking system. To solve this problem, it is necessary to determine the points of connection of the security mechanism, taking into account a number of features (a type of signaling, the exclusivity of the car, the location of the central unit of the car alarm of the vehicle).
3. The problem of choosing an installation scheme (color designations of various mechanisms may be intended for other functions). It is advisable to use the original diagrams for your car alarm model.

Did you know? The most expensive car in the world is the Italian sports car Lamborghini Veneno Roadster, worth $4.5 million.

Connection diagrams

We present a universal connection scheme.
Wiring diagram Despite the rather time-consuming process of installing a car alarm with your own hands, the efforts spent will not be in vain, because this will save a good amount of money (most often, the cost of professional services is equal to the price of the alarm kit itself).

Did you know?The most stolen cars in the world are brandsMercedes-Benz (C-Class), BMW 3, Infinity (G-series).

In addition, it will bring a lot of pleasure to those who like to do everything with their own hands.