Hi all.
In today's review, we will talk about the universal central lock (and to be more precise, the control unit) that I ordered on Aliexpress. It was bought for installation in a Dodge Intrepid car. I have always wondered for some unknown reason that American engineers provided a central lock in the car, but did not equip it with a remote control. It would seem a trifle, but the constant use of a key to open / close doors through a keyhole does not bring much pleasure, especially if there are packages in the hands :) So it was decided to do something about it.
Initially, the option of installing an alarm was considered, but in the end it was decided to abandon this idea. After all, even the most budget option would cost about $50, and who needs an Intrepid from 2003? :) Unless the "pioneers" would be driven away, although even that is not a fact. So it was decided to look towards the Chinese comrades from Aliexpress.
The result of the search was the monitored lot. The main reason for buying this particular model was that this set does not have separate key fobs that would have to be carried along with the keys. The key fob is combined with the key, just like modern cars.
It took a little more than a month for the parcel to get from China to Belarus, you can see detailed information about its movement.
The unit is shipped without any original packaging. My copy came in a regular plastic bag. Of course, it will not work for a gift, but since putting it on yourself, this moment does not really matter. 
The package included, in fact, the unit itself, a wiring harness, two key fobs, connection instructions (in English), as well as a couple of pieces of double-sided tape. 
This photo clearly shows the biggest disadvantage of this purchase - there is no decorative sticker included with the keys to close up the recess in the case. It is clear that the block is universal, but they could have put a couple of stickers with some kind of neutral inscription or picture in the kit. So you have to come up with something yourself.
The instructions describe the capabilities of this kit, as well as how and what you need to press in order to achieve the desired result. 
It also has a wiring diagram for the control unit. 
In principle, there is nothing complicated and, having found all the necessary wires in the wiring of the car, everyone is able to cope with the installation of the unit.
I have no complaints about the workmanship of both the block and the keys. Everything looks nice and neat, nothing is broken anywhere. There is also no foreign smell from plastic.
The wiring harness is connected to the back of the unit in a special connector. There is also a connector for connecting a diode indicator (just from the "pioneers") and a reset button. 
On the opposite end there are a couple of stickers, one of which, as I understand it, denotes something like a serial number. The keys have stickers with the same number. Apparently, in order not to confuse keys / blocks related to each other. 
The halves of the control unit housing are connected with a couple of self-tapping screws, so there is no problem getting to the insides. This is what its uncomplicated filling looks like: 
A board with a one-sided arrangement of elements, the soldering quality is standard for Chinese electronics: everything is more or less neat, but they could not completely get rid of the flux. 
Each key has a blue diode that lights up when a button is pressed. The buttons themselves are pressed pleasantly, the stroke is small, the clicks are not very loud. Everything is at the level of ordinary keys. 
The sting of the key is removable, rests on a small screw. So changing is not a problem. But you can not change it, but carve it from an existing workpiece (if it fits in shape). In our case, a replacement was carried out. 
The key body consists of two halves. You can put a chip in one of them, if there is one, and in the second there is a “stuffing”. 
The key is powered by two CR2016 batteries. I do not know how long they will last, but I think that for a couple of years for sure. 
In principle, there is nothing more interesting both in appearance and in the device of the block, so you can proceed to install it.
There is nothing particularly difficult with this, the main thing is to find all the necessary wires :) In the case of the Dodge, they are in the same harness that goes to the fuse box, which is above the left knee. 
It took about an hour to install the block. If we add the time spent on finding all the necessary wires and disassembling / assembling the cabin, then it took a total of 2 hours. As a result of all the work, the block was placed in the same place: 
Since this unit is universal and fits any car, it makes little sense to describe what wiring should be connected to. Dodge has wires of one color, another car has a different one. Yes, and Intrepid is not a very popular model :) However, if you have any questions - ask, I will try to help.
The health check showed that everything works exactly as it should. The doors and trunk lid open and close without any problems. As for the triggering distance - from the window on the 12th floor to the car, standing at a distance of 15 meters from the entrance, it finishes without problems. But it is in a straight line and without obstacles. In the parking lot, it works from 10 meters.
Summing up everything that was written here, I can say that this central locking control unit turned out to be efficient :) So far, no problems with operation have been found. So given the low cost, ease of installation and good functionality, it turned out to be a very useful addition to the car. So the purchase was 100% satisfied. But it is important to remember that this is just a remote control unit. It's not an alarm or central locking. Installing this unit allows you to remotely unlock / lock the doors and nothing more :)
That's all. Thank you for your attention and your time.
I plan to buy +20 Add to favorites Liked the review +34 +56This article will discuss the problems of the central lock on conventional activators.
The photographs show conventional central locking activators.
The diagram below shows the connection of four activators to the relays built into the alarm. Sometimes these relays are called the built-in central locking interface. But they may not be in the alarm, then there are at least two low-current outputs for controlling external relays. An example of built-in relays is Fortress alarms, on the contrary, the absence of a relay is Cher Khan 2 or Excallibur ATV900 alarms.
According to the diagram, if points B1 and B2 are connected to the connector, then external relays are connected to them and, accordingly, B1 will be the unlocking contact, and B2 the locking contact. Point A may or may not be connected to a connector. In the latter case, the power supply for the common point (A) of the relay is taken from the signaling power supply or from the power supply of the activators (at one of the points D).
Brief description of the operation of the scheme.
The control impulse for opening/closing the central lock arrives at point B1 or B2. The corresponding relay is activated.
The switching of the activators themselves occurs by the power contacts of the relay. One relay and its power contacts are called the locking relay, the other is unlocking. It can be seen from the diagram that the activators are connected to the 30th contacts of the relay and in a calm state, through normally closed 87a contacts, there is a mass on both outputs of the activator. Now, if any relay is triggered (contact 30 is briefly connected to the positive on pin 87), then voltage will be briefly applied to the corresponding output of the activator and, accordingly, the activator rod extends or retracts, thereby closing or opening the door lock. Since all actuators are connected in parallel, all doors will open (close).
Let's analyze the options for malfunctioning the central lock.
Troubleshooting.
Troubleshooting is best to start with the power wires.
Troubleshooting is more convenient to carry out with an LED probe and a pointer multimeter. It is necessary to make a reservation that both tools have their drawbacks when conducting verification. The LED at a voltage of 1-1.5 volts will not glow and will not show a voltage drop from 12 to 10 volts, and the pointer device, due to its inertia, will not have time to respond to short pulses of the central locking control.
Let's start checking.
Power must be connected to the fuse block.
The fuse must be intact.
If the fuse is blown, check the chain of points D ... with an ohmmeter for a short circuit with the mass of the car, if a mass is detected, check the wires and eliminate the short circuit. Possible relay malfunction, sticking of contacts, see
Insert a fuse. We are trying to make the central lock work from the key fob.
If the relay clicks are not heard, it is necessary to check the power at point A and control at points B1 and B2.
There are relay clicks, the fuse is intact, the central locking does not work.
- We check the power supply at points D ... and on contacts 87 of both relays. If there is power before operation, and when the relay is activated, it disappears, then there is poor contact in the power circuit, from the fuse connection point to the relay contacts themselves.
- We check the power mass with a LED probe at points E and up to contacts 87a of the relay. If the LED on the ground wire lights up when the relay is triggered, then there is a bad ground on the body, connectors or other connections.
- We check the control power impulses on the 30th relay contacts. If there are no pulses, then carbon deposits are possible on the relay contacts, see article.
If pulses are present, then a wire break is possible in the area from 30 relay contacts to the activators themselves (the activator winding may be broken).
If during sequential check at points C1-2 and C2-2, when closing or opening on both wires plus appears at the same time, it means a break in one of the wires, before checkpoints.
The fuse burns out with one or any operation of the central lock. As mentioned above, this is a short circuit between the wires of the activator, or both wires are frayed and shorted to ground, or one of the power control wires is shorted to ground.
In the photo you can see a low-quality transition of a VAZ car. Such a laying of wires causes the above mentioned defect.
Five-wire activator.
The two wires of this activator, as usual, are power control. The remaining three wires are connected to a microswitch inside the activator.
One of the three wires is the central contact and, depending on the position of the activator rod, it is closed to one of the remaining two wires.
Such an activator is also called a master lock. With the help of a separate central locking module, it is possible to organize the closing of all doors by controlling, either mechanically with a key, or by pressing the driver's door lock button in the cabin. This method of controlling the central lock is also used by domestic manufacturers.
Central locking modules may differ slightly in control signals, this will be discussed below. Here it can be added that some alarms have a separate wire to implement a similar function (for example, Fortress F1).
This control method has a drawback. When the mask is turned, all the locks will open at once, although it is better for car security that the locks open in stages and close at the same time.
And another drawback is the precise and reliable adjustment of the mechanical fastening of the thrust. If the movement of the activator rod is not completely or on the verge of being triggered, then in some cases it is possible that all the doors will either not close or open. The most annoying thing is that opening can happen by accident in the absence of the owner. This is especially true on domestic cars, where there are always backlashes, gaps, cracks in which dirt gets in and is deposited on the lubricant, preventing the activator from reliable operation, not to mention the corrosion of mechanical parts.
Factory central locking of domestic cars.
Modern domestic cars are increasingly equipped with a central lock, which is controlled by a key from the mask or by raising and lowering the lock button in the driver's door. I have come across three options for implementing the central locking function.
The first option - a conventional two-wire activator was installed in three car doors, and a five-wire master lock was installed in the driver's door.
The central wire of the lock master microswitch is connected to ground (usually black), the remaining control wires (white and brown) to the central locking unit. Depending on the presence of a mass signal on one or another control wire, the central locking module will give a command to "close or open" all activators via the power wires. In this (original production time) version, an additional signaling was simply connected to these wires and controlled by a ground signal.
The second control option is similar to the first, but at the same time, in order to control the activators, it was not enough to send a ground signal to the wire, for example, "closing", it is necessary to disconnect the "opening" wire from the mass before that. What happens in this case is if you control the key or the door lock button, but connecting the alarm is a little more difficult.
There are two signaling connection schemes in these cases. In the first case, the switching of the low-current control circuit and when the signaling unit is removed, the central lock does not work completely. In the second case, the driver's door activator is cut off from the common power circuit and its control is transferred to the alarm system; when the alarm unit is removed, the operation of the central lock does not change.
Also, the VAZ manufacturer wanted to save on the driver's door activator and began to insert only a switch there. In this case, for a complete central lock, it is necessary to install an additional conventional activator in the door by connecting it to standard wires. And cut off the power control of the driver's door activator control from the general wiring and transfer it to the signaling as in the diagram of the second option (see above). An additional activator will control the alarm through the mechanics, the central lock switch and, accordingly, the remaining doors.
The last third option is the central lock module of the Volga car.
The driver's door of the Volga also has a five-wire master lock, single-wire control. More precisely, by the presence or absence of a mass signal on this wire. The central contact of the activator microswitch is connected to ground. The connection diagram is as follows.
The disadvantages of this option are similar to those described above.
Mechanical failures.
Mechanical failures have already been mentioned above several times, but still I will repeat.
Incorrect installation of activators, backlashes and gaps in mechanisms, moisture and dirt ingress into mechanisms, rust corrosion, poor-quality activators of a domestic or Chinese manufacturer.
An example of installing activators.
Send questions, comments and suggestions on the article.
Possible schemes of various connections will be placed gradually in the article "Interesting schemes".
Allowing to increase the convenience and efficiency of vehicle protection. But not every motorist knows the device and the principle of operation of such a system. Where is the control unit located, is it possible to securely protect your car with a central lock, how to install the device - read about this below.
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Characteristics of the central lock
Principle of operation
Remote control central locking is not a vehicle component, but the general name of the block diagram of a car locking device. The main purpose of such a scheme is to open and close doors at a certain moment. Depending on the system, central locking can also close the gas cap. It is noteworthy that the central locking control unit with remote control can be turned on both when the engine is on and off.
As for the principle of operation, it consists in the following. When the driver turns the key in the car door, a microswitch is activated, which is responsible for protection. The impulse from this element of the system is transmitted to the unit, and from it to the rest of the device components. When the impulse hits the block, all executive components start to work, resulting in a complete blocking or unlocking of the doors. It should be noted that the impulse that comes from the switch to the unit does not allow the drive to turn on again (the author of the video is China ruS).
But if necessary, it is possible to completely lock the car doors using a non-contact method. To do this, just use the remote control - it has a special button that transmits the necessary impulse to the antenna. Thus, the central locking unit sends a similar command to the actuators to lock or unlock the doors. If the system is connected correctly, the locking mechanisms can activate the nodes responsible for automatically raising the windows.
If the vehicle gets into an accident, the device lock is deactivated automatically. In this case, the so-called passive block is included in the work, ensuring the full opening of the doors if necessary. But if as a result of an accident there was a malfunction in the functioning of one of the elements, the central lock may simply not work.
Peculiarities
After installing and connecting the central lock on a car, you can greatly simplify the procedure for closing and opening doors. Without exception, all central locks are universal devices, respectively, you will not have problems choosing the required option. The standard kit contains the main control module, the lock itself, as well as an electric drive for installation and connection. It should be noted that any central lock always works both from the key and the remote control, combining such a device with an alarm is not a problem. As for the remote control, then, as a rule, after installation and connection, it can transmit a signal at a distance of no more than 10 meters.
To ensure greater comfort during vehicle operation, the system module can be additionally equipped with an activator. The activator is a device for closing the tailgate. Thanks to the activator, it will be even more convenient to open and close the fifth door. As in the case of a conventional central lock, the activator works both from the remote control and from the key. One of the features of such a system is the ability to encode certain functions. For example, you can program an activator or a central lock so that these elements automatically turn on if the vehicle speed exceeds 80 km / h.
Device
As for the device of the system with an activator and a remote control, its main components are the executive components (actuators), input regulators, as well as the unit itself. Limit switches (limit switches), as well as switches of the system itself, are used as input regulators. The main purpose of the limit switch is to fix the current position of the car door, as well as further transmission of the impulse to the central bank (the author of the video is Simple Things).
The switches are designed to detect the current position of the components of the system design with an activator and a remote control. There are two more switches on the central locking cam itself, one of which performs blocking, and the second, respectively, unlocks. There are two more switches in the system - they are designed to remember the position of the central lock. The last switch is installed on the fixing component of the position of the lever device - it allows you to determine the state of the door.
The switches transmit impulses to the computer, subsequently they are sent to the central module. As for such a component as an actuator, in fact it is a conventional DC electric motor directly connected to a gearbox that is simple in design. In addition to these components, a pneumatic drive can also be used in the system, but this is more true for older Mercedes and Volkswagen cars.
Installation guide
How to install and connect a central lock with an activator and a remote control with your own hands:
- First of all, the battery is disconnected, after which the lining is removed from the doors. Remove the entire trim, including all screws and clips. It is also necessary to untwist the facing panel under the steering wheel.
- Next, you need to decide on the place where the device will be mounted. According to many experts, the best option would be to install the central lock in the lower left corner, since even when the glass is lowered, it will not affect the operation of the central lock in any way.
- The next step in installing a system with an activator and a remote control will be the installation of lock activators. All of these activators are mounted in the corresponding holes in each door. If there are no holes, then they will need to be drilled on their own. Activators are fixed with self-tapping screws.
- Next, you need to connect the activator to the lock rod. In this case, the most important point is the alignment of the center of the stroke of the rods. After these actions, from the activators, it is necessary to put the fixing elements on the rods of the manual block. Immediately after connecting, you should immediately check whether the circuit is operational.
- Then you should lay the wiring. The chain that comes from the activators must be securely fixed, use clamps for this. Clamps do not need to be installed at the bottom of the door, as moisture often collects there. To do everything right, it would be more optimal to purchase a special corrugation or rubber pipe that will protect the wiring from environmental influences and bends.
- The next step is to dismantle the control panel (dashboard), you need to find the place where the wiring passes, usually it is behind the glove box. You need to connect the activator drives, then insulate and route them. The resulting chain must be laid under the control panel, as well as the glove box.
- Now you need to mount the feed-through tube in the rack.
- Then you need to connect a fuse to the connector, and then connect it to the central locking unit. Ultimately, the center console will need to be assembled.
- Next, the wire is connected from the remote control system to the vehicle. The negative output is connected to the car body, and the positive output is connected directly to the fuse.
- When all the connection steps are completed, it remains to check the performance. To do this, connect the battery and check how all the doors close. It's also a good idea to check the wiring. If everything works fine, assemble the trim and other interior elements in reverse order.
Video "Installation of the central lock using the example of a Daewoo Sens car"
A detailed description of the process of installing a central lock on a Daewoo Sens car is presented below (the author of the video is Lesha Master).
For motorists, the comfort system is of particular importance. Isn't it convenient when all the doors on your car, the fuel tank cap, the tailgate are locked and unlocked at the touch of a button on the key? Such a mechanism is related to auxiliary systems and is called the central locking of the car.
The functions of the central lock can be controlled centrally and decentralized. What does this mean?
- Centralized - a single electronic control unit for all doors.
- Decentralized - in addition to a single control unit, there are more blocks: one for each door.
Consider the central locking device as a comfort system and the principle of its operation.
The control unit, input sensors and actuators that perform the executive function, all these are the nodes of the “central locking” mechanism.
The whole system is controlled remotely from the control panel. The remote control is a radio transmitter, which is located in the handle of the ignition key. From it, the signal is sent to the antenna of the central control unit. Remotely, the central locking functions work at a distance of up to 10 meters.
Input sensors in the lock mechanism are microswitches and door limit switches. To fix the current position in the design of the car door, microswitches are used. To transmit a signal to the control unit and fix its current position there, a limit switch is used.
The front doors of the car are equipped with a cam mechanism and microswitches that fix the position of the lock. Moreover, the surface of these cams has a special profile. The "Lock" signal generates one of the two microswitches, the other generates the "Unlock" signal.
Two more microswitches form a signal of the central locking device about the current state. When triggered, they will transmit "Unlocked" (Unlocked) or "Locked" (Locked).
The lock drive has a lever mechanism. To fix its position and determine the current position of the door, another microswitch works. If the door is opened, the switch contacts close. In this position, the vehicle's central locking mechanism cannot be activated.
From all switches, signals are sent to the electronic control unit. Which processes them and sends them to the central unit. The processed signal is then redirected to the control units for the front doors, to the actuators of the rear door locks, the fuel cap lock or the tailgate. In other words, the door control units receive a signal that activates the actuators for locking doors and other locks.
The actuator is the very actuator, the door lock. It is combined with a gearbox and is a DC motor. The gearbox, rotating the electric motor, gives the mechanism a reciprocating motion - this is how the lock cylinder works.
In addition to the electric drive, there are pneumatic designs of actuators. For example, well-known German factories and used pneumatics in their cars. Pneumatic actuators are almost non-existent these days.
Video about the central locking systems of the car and their principle of operation:
The central locking system functions regardless of the ignition state of the machine. Whether it is on or off - it does not matter, the mechanism will work.
Locking the front door with a key, you start the function of the microswitch responsible for blocking. This happens as follows: from the switch, a signal is sent to the unit that controls the door, then it goes to the central control unit, which controls all the door units, the electric motors of the rear door actuators, the tank lid and the trunk. All actuators are started and the car doors are blocked. To prevent the electric actuator from being triggered again, a microswitch signal is generated in the central locking device. You can unlock the door in the same way - by turning the key in the lock.
To lock the doors of your car at a distance (remotely), there is a button on the ignition key or there is a separate key fob with buttons. When pressed, a signal is sent to the receiving antenna in the central control unit. There, the “message” is processed and the command leaves the center for peripheral units (on the door, locking the fuel tank cap and trunk). Actuators, which actuate the button on the ignition key, ensure that all doors in the car are locked. As well as fixing the doors, the alarm is turned on remotely with the button. Additional comfort will be the remote control of the windows of the car. It will cost more, but it turns out 3 in one: door lock, connection of a security alarm and automatic lifting of the lowered windows.
It is worth noting that in the event of a traffic accident, all doors will automatically unlock. This is done by transmitting a signal from the passive safety control unit to the central control unit. And the command to actuate the actuators leaves the center, all the doors are opened.
Video about the reasons why the central lock does not work:
Wiring diagrams of the central lock
Central locking control circuit for a VAZ 21099 car. It can also be used for VAZ 2110 and 2115 cars.
Wiring diagram for the Central Lock on the Mitsubishi Lancer 9 series.
Wiring diagram for connecting to the central lock on the Volkswagen Polo. Everything is done on one wire. To open the doors, a minus is applied to it, and for closing - a minus through a 1 kΩ resistor.
Scheme of negative control of the central lock. It is often used in VAZ 2110 cars, as well as some other foreign cars of Japanese and Korean production.
Scheme of positive control of the central lock. Usually they use this scheme on American-made cars, for example, on Fords - Mondeo.
Video about installing a central lock on Daewoo Sens:
Video about installing the system on the VAZ 2107:
Connecting the alarm to the central lock takes some time. Connecting a car alarm to the central lock (CL) looks not easy. If the type of lock on the car is known, there are no difficulties. In the article below, we will describe the connection of alarms to the central lock, of various designs.
Preparing to connect a car alarm to the central lock
Connecting an alarm requires studying: regular locking devices installed. The central lock of the machine is an electromechanical operating principle system. and central locking require coordinated work. The central lock assembly consists of nodes:
- The control module, responsible for the synchronous operation of all locks, is connected by the provided connectors to the electronic protection of the car against theft.
- Buttons, sensors, alarm connection to the central lock.
- Central locking drives - are available in electric and pneumatic versions. Car alarms are often connected to electric locks with an electric drive.
The connection of electronic protection to the central lock of the machine is performed with a preliminary search for access points. Only a specialist who understands electrical engineering can find access points by strength. The points are indicated in the diagrams: instructions for installing car alarms; cars.
On passenger vehicles, control modules, with vehicle protection connection points, are placed in the places designated for them. Car alarms are connected to the central lock through the cabin wiring switching unit. Different brands have their own locations, but they are known to specialists.
The placement of blocks at the bottom of the front panel is common. On older brands of vehicles, they are located to the left of the steering column. On new Russian models, the blocks are located to the right of the gas pedal.
Basic principles for connecting an alarm to a central lock
Connecting electronic anti-theft protection to the central lock is allowed by options. On car alarm diagrams, the contacts used by the relay in the car are indicated.
Methods for connecting car alarms to central locks:
- positive impulses.
- negative impulses.
- alternating polarity.
Below we present the signaling connection with the central lock.
positive impulses
Connecting a car alarm to the central lock of the car, with positive impulses, is done by two schemes:
- (A) is used when the central lock is controlled by an electronic module.
- (B) - when controlling internal drives.
The use of scheme (A), when connecting the electronic protection of the car, is typical for brands: General Motors; Volkswagen Passat; Renault; Kreisler; parts of BMW, Ford models.
The essence of connecting the central lock with a car alarm is to apply an impulse - 1 s to the control wires. The control module is working. By connecting the contact of the multimeter or "control" to the positive terminal of the car's battery, the wires of the door bundle are pierced alternately with a free probe. Electric locks are triggered when the desired wire is punctured.
The procedure is performed by qualified specialists. Connecting an alarm according to this scheme simulates closing, opening locks with buttons.
By connecting electronic anti-theft protection - circuit (B), they achieve control of the central locking drive by positive potentials. The contact group of the drive is connected to the contacts of the machine alarm relay. The pulse duration is set to 4 s. – drive response time. Power is supplied through a fuse.
Negative impulses
Negative central locking control is widespread in many car brands, car alarm connection is typical for passenger cars: Opel; Toyota; Honda; Fiat; Volvo; Citroen; parts of BMW models; VAZ 2111.
The central lock is controlled by applying a short negative pulse - 1 s to the control wires from the car's electronic protection. The car alarm is connected according to the previous scheme (A). The difference is that wires are connected to the contacts of the alarm relay, supplying a negative pulse of 1 and 4 s to the central lock.
A good example of connecting a car alarm to the central lock with a negative pulse is the VAZ 2111.
alternating polarity
The third type of electronic central locking control is the alternate supply of positive and negative impulses to the drives. It is more often observed in cars manufactured in the USA in the period 1990 - 2000. Three schemes have been proposed:
- Power buttons;
- Central lock control module;
- Electric drives.
The first scheme is more common in cars manufactured in the USA between 1990 and 2000, based on the use of door buttons. Door buttons are connected to the contacts of the electronic protection relay. Turn on, turn off the protection copies the lock, unlock buttons. To the wires of the buttons working for opening, closing, the corresponding impulses are signaled - positive or negative. Power is supplied through a fuse designed for a current value of 10 to 15 A.
According to the second scheme, the alarm connection is implemented through the central locking control module. Electronic security wires on the vehicle are attached to the break in the power conductors of the actuators. The master who mounts must successfully understand the signaling and central locking circuits.
The third reverse connection scheme is based on the supply of signals from the car alarm key fob to the central locking of the car. The pulses are fed through the machine alarm relay, which reverses polarity with a period of 1 s.
When connecting the electronic protection of the car against theft to the central lock, difficulties arise. To eliminate negativity in the process of connecting the nodes, you should stock up on diagrams, tools, devices when connecting the alarm to the central lock. It is advisable to read on the forums about the possible difficulties when performing connection operations to the system.
Many car alarms are connected to central locks. Modern alarm systems do not care what drives are used in the locks. Central locks are controlled by positive, negative pulses, as well as variable polarity, transmitted by car alarms.
