With your own hands, you must have at least the slightest idea of \u200b\u200bhow such electrical equipment works. More recently, such an installation could only be done by experienced auto electricians. But now in free access there is a lot of information about proper installation devices.
Anyone can study walkthrough and do all the work yourself. Even the alarm operating instructions describe in detail all the manipulations that are carried out on the car. There you will even find a description of the functions that you can program yourself. Installing a Sheriff alarm on a car with your own hands is no different from installing any other anti-theft system.
Car Alarm Benefits
Regardless of whether you have a new car or with a high mileage, it can become a tidbit for car thieves. If you buy a new car at a car dealership, then most likely the dealer will offer you to set an alarm. And they can even threaten that with the unauthorized installation of the security system, the car will be removed from the guarantee.
But you yourself choose where and which security system you will install. Such actions of dealers are illegal, they just try to earn the maximum. In the event that the alarm installer gives a guarantee for his work, he confirms that the installation is performed in accordance with all requirements. And a car dealership can refuse warranty service only if it is proved that the car broke down precisely due to illiterate installation.
Do-it-yourself installation
There are several advantages of installing an alarm on a car with your own hands. VAZ of almost all models are cars not very complex in design. They can be equipped without any problems with security systems of any type. You will receive the following benefits:
- Save a lot of money. If you go to the workshop, then an electrician will take a round sum from you - you can buy with this money new alarmand sometimes even two.
- Of course, you will receive moral satisfaction from the work done. The security system is a complex equipment that not everyone can install and configure correctly. If you do the installation yourself, you will also get useful installation experience security systems.
- If all control elements, as well as sensors, are installed in car dealerships and workshops, in the same places on all cars, without exception, then with self-installation you can choose any arrangement of components.
These are just the main benefits. self-assembly. Each motorist can bring some of their own characteristics. For example, add one or two additional sensors to the system and thereby increase the degree of security. At special desire you can even change the standard sound of the bell needed to alert you when someone is trying to enter a car.
Varieties and configuration of security alarms
Before installation, it is necessary to choose the most appropriate security system. First of all, decide on the manufacturer, then with the model. The cost of the device will depend on the number of security and service functions. To summarize, then all security complexes can be divided into three subgroups:
- The simplest car alarms in which there is an anti-grabber, anti-scanner, several outputs for controlling power mechanisms, electric locks, inputs for connecting sensors.
- Alarms having feedbackare equipped big amount sensors, and also allow when trying to get into the car to issue an alert on the keychain.
- The most advanced type of devices, since they can dial the number specified in the settings in the event of a break-in. In addition, it is possible to track the position of the car using geolocation.
The simplest car alarms
Also called "openers", as they have very few functions:
- Arming and disarming.
- Opening and closing all doors.
- When you try to enter the car, panic mode is activated, sound and light alerts occur.
- In case of unauthorized access, the engine start is blocked.
Among the shortcomings of such security devices, one can distinguish one basic one - a very simple protocol, according to which radio commands are transmitted. Therefore, installing an alarm on a car with your own hands will add only one useful function - remote opening of doors and trunk. Such devices are one-sided, and the range does not exceed several tens of meters. Among the advantages can be identified only low cost.
Feedback equipped alarm
If you need to install a car alarm with auto start, then you need to use just this type of device. This is the most modern designs, they have a lot of functions, a more advanced data transfer protocol. This means that when using this car alarm, you can not only control, but also receive information from the car.
For example, a driver can receive information on his keychain about whether the car is armed and whether hacking attempts have been made. The following features are also available for car alarms:
- Remote engine start for warming up in winter.
- Install turbo timer. The engine continues to idle so that the turbine compressor will cool down after arming.
- The inclusion of various modes of illumination of the passenger compartment and car body.
- Electric closers for windows or sunroof. When arming, if windows or a hatch were open, they will automatically close.
The range of this type of device is several hundred meters. The cost is at least twice as much as that of simple security systems.
GSM car alarm
The main unit has a GSM-module, as well as GPS geolocation. The signals from these two modules are fed to the microcontroller, which performs the functions of a computer that collects and processes information. The GSM module is similar in principle to a simple cell phone. It receives and transmits signals in the area of \u200b\u200bthe mobile network. The GPS module using the satellite allows you to determine the position of the car at a particular point in time.
Do-it-yourself car alarm installation according to the standard scheme. It is similar for simple systems as well as for more complex ones. Using the controller, all information coming from the sensors of the security system is processed, after which the parameters of the control signals are calculated. The driver can control his car using SMS and voice, as well as through a browser over the Internet.
Tools and materials for installation
Before you install it yourself, you need to collect the following tools:
- Multimeter - with its help, the voltage is measured, the wiring of the wiring is carried out.
- Set of flat and Phillips screwdrivers.
- Sockets and ratchet.
- Electric soldering iron.
- Scissors, nippers.
Still need such materials:
- Double-sided tape.
- Insulation tape and heat shrink.
- Plastic tie clamps (preferably black).
You need to have a few wires on hand different colorto add them if necessary while connecting the device.
Installation
DIY step-by-step installation instructions:
- Decide on the installation location of the central unit. The further you hide it, the more likely it is that when an attacker tries to break in, he will not be able to disable the guard. It is advisable to place the central unit deep under dashboard, there are enough free niches.
- Mark the position of the sensors in the passenger compartment. The shock sensor must be installed on the partition of the engine compartment.
- If the vehicle does not have limit switches, install them. In this case, the security system will be able to record the opening of doors, hood, trunk.
- Decide on how the startup lock will be held. For carburetor vehicles, it is best to turn off the power to the switch or short to ground the Hall sensor. On injection vehicles, you can open the power circuit of the gasoline pump, injectors, electronic control unit.
- Upon completion, connect the unit to the vehicle electrical system via a fuse.
According to this scheme, the installation of a car alarm with auto start is performed. The installation instructions that come with the device contain full description designs, and most importantly - detailed guide for programming all functions.
When installing an anti-theft system on a personal car, the main expense items become the purchase of a car alarm kit and payment for installation, which is carried out by specialized services. A rather complicated installation of an alarm on a car with your own hands will help to save money and will become a testing ground for novice motorists to practice disassembling and assembling doors, interior elements, and the car dashboard. In the course of independent work, you will thoroughly understand the functions of the anti-theft protective system, features of adjustment of sensors.
Choosing an anti-theft alarm model for self-installation
The complexity of the car anti-theft alarm system depends on the electronic filling of the control unit, the number of monitoring sensors, and additional functions of the security complex. Normal installation, configuration, regular prophylaxis of even the simplest car alarms allows you to put the system in remote control mode with the remote control, and remove the car from the security mode. Control sensors provide a car alarm response to attempts to open the hood, any door, trunk, glass blows, body damage.
Having decided to install an automobile anti-theft system yourself, evaluate own forcesworking skills. Unqualified disassembly, you can damage the mechanisms of the car, improper installation will disable the purchased car alarm. With a lack of skills, contacting a car service center will be more economical than repairing a car or buying a new anti-theft system.
The complexity of installing car alarms with geolocation, auto-start is already visible by the configuration of the security system, the number of sensors and wires
Novice motorists should not choose to self installation car alarms special models with:
- GSM modules, encoded by dialog signal transmission;
- remote start of the engine according to the timer, engine temperature;
- launch of turbocharged engines, automatic transmission;
- numerous additional features (with launching from a smartphone, in pager mode, turning on the Webasto type heater, separate automatic air conditioning systems).
For the installation of complex security systems, it is better to contact a trusted car service. Difficulties in installing expensive alarms are bypassing standard immobilizers, flashing factory protections. Professionals will be able to install a car alarm, while maintaining the standard wiring, the protective functions of the immobilizer. For installation, you may need additional modules, changing the CAN interface. The installation of anti-theft protection on cars equipped with start-stop systems, for which many popular car alarms are not suitable, is also a complex work.
For self-installation, it is better to choose a car alarm with a minimum set of sensors.
A simple set of car alarms includes a control unit, remote control, transceiver antenna, shock sensor, siren, cables for connection. Additionally, the alarm can be equipped with a separate programming unit.
Such an anti-theft alarm system can provide the main security tasks: respond to attempts to open doors, hood, trunk, turn on the ignition, break the windows of the car.
Practical steps for installing alarm elements
First stage practical work it becomes an attentive reading of the instructions, the selection of materials from the Internet, the preparation of tools and the workplace. Installation of the alarm system can only be carried out in an isolated garage. Disassemble the door, the locks of the machine is necessary only with the experience of automobile repairs. Unable to collect door mechanismsyou have to go to a car service with open doorStorage of the machine in this condition in the yard is not possible.
On the typical scheme places of the possible location of security alarm elements in the cabin and under the hood of the car are indicated.
A typical scheme is not a dogma for the car owner, the installation location of the control unit, sensors are selected according to the instructions for car alarms, manufacturer's recommendations. The main reasons for the self-installation of alarms, in addition to budgetary difficulties, are the desire to do everything with their own hands and the non-standard arrangement of elements of the security system.
The “heart” of car alarms is the central control unit that controls the security system. It is with him that the installation of the alarm begins.
Choosing a hidden location for installing the control unit becomes the main task of the installation. Do not install the unit in conspicuous places under the glove compartment or near the fuse box. The location of the electronic device under the hood disappears due to high humidity and engine temperature. Take the trouble to disassemble the dashboard and mount the power supply on a separate bracket.
The power supply of the security system, going through the control unit, is powered by two shielded wires. The negative wire is attached to the car body, the positive core must be stretched to the battery. Experts advise to solder all the electrical contacts of the security system, this is more reliable than the twisting of wires.
For simple anti-theft systems, the shock sensor becomes the main sensor, when installing it, a number of rules must be observed.
At the place of installation of the shock sensor, opinions differ. Auto mechanics mount the shock sensor on the metal of the body, attach it with plastic clamps to the wiring harnesses, and install it on the control unit body. In these cases, the normal operation is prevented by weak metal vibrations or the mobility of the tow, in which it is difficult to correctly adjust the sensitivity of the sensor. It is logical to mount the sensor in the center of the cabin, where it responds to influences from all elements of the car, but the owner of the car chooses the specific installation location for the sensor.
An antenna (transceiver) is connected to the control unit remote control car alarms for mounting which best place consider the windshield behind the rear-view mirror. Wires from the antenna to the right side it is better to stretch under the skin of the passenger compartment.
To ensure a response to hacking with light signals, the security system is connected to automotive optics. The wires from the control unit can be connected to the turn signals, brake lights, head light. You shouldn’t connect directly to the wiring, it’s easier to find the “emergency light” switch (for brake lights) and the dipped-beam relay of the head optics to connect.
The difficult moment of installation is the connection of the control unit to the central ignition lock. To connect to the central locking control unit, search for connection points, you need to carefully study the electrical circuit of the car. The designs of central locks are different for all car manufacturers, so you can’t give exact recommendations. For installation, additional relays may be needed, since standard power switches and fuses may not cope with the additional load.
To connect the door locks, hood, trunk locks to car alarms, you need to find the point of attachment of the standard wiring in the car diagram or “ring” the wires with a multimeter.
For a number of models, the search for contacts can be limited to the cabin backlight control unit, where electrical connections are grouped. The difficult moment of installation will be the disassembly of the door panels, in which you need to mark everything removed itemsKnow the dismantling and assembly technology.
The choice of mounting siren on the metal of the body of the engine compartment is not important. For a siren, any free space on the engine compartment metal is suitable.
When mounting, use strong bolted or screw connectionsexcluding falling siren. To protect against damp, causing false alarms, the siren can be covered with a plastic cap or plastic cover.
The installation of an alarm on a car with your own hands in the video is shown in great detail:
Anti-theft system adjustment and frequent errors
After self-installing the main unit and sensors, it will be much easier for you to fix installation errors, from which no novice motorist is safe.
The most common causes spontaneous (false) alarms become:
- Setting sensors to high level sensitivity. Beginning installers, having installed the sensor, forget to adjust it and mount the removed elements in place. The sensitivity level set by the manufacturer triggers sensors from loud music, gusts of wind, falling branches, and passing cars. To fine-tune some sensors, you have to reassemble the elements of the machine.
- Insufficient wiring insulation. Neglect of insulation leads to gusts of wires, their oxidation, breaking contacts. Violations of the integrity of the wiring cause the inclusion of the "Alarm" mode. When laying electric cables from blocking the gas tank, wheels, trunk lid, the electric wires must be assembled into bundles, securely fixed, avoiding grinding.
- Oxidation of limit switches. Soldering and additional insulation will help to avoid the rapid oxidation of electrical wiring contacts in the ends of the hood, doors, trunk.
- Humidity under the hood. Constant heating and cooling of the engine compartment during engine operation causes condensation to form on the alarm wires, the siren housing, causing spontaneous switching on. All alarm elements under the hood must be additionally insulated.
- The location of the wiring near the hot engine parts. It leads to overheating, insulation damage, burnout of wires. It is better to think over a safe arrangement of wires at once, without waiting for malfunction.
- Poor sensor mounting. Automobile vibrations, shaking of sensor supports during movement cause unwinding, destruction of improvised brackets and clamps. A dropped sensor, if it does not collapse, cannot function normally. Another common mistake is to tighten the fragile housing of the sensor with screws or bolts, which leads to deformation, destruction of the sensor.
Sensors with rotary knobs can be adjusted, buying sensors with an integral housing in the alarm kit, ask sellers for adjustment possibilities. The rotary control is set at the factory in the middle position or at maximum sensitivity.
Nowadays, there are many ways to protect the car from theft, but the most common is the use of alarms. The standard signaling systems in the new transport have the simplest set of functions, and, therefore, are not able to provide the necessary level of car safety. As a result of this, the installation of an alarm system, which has more functionality. Specialized alarms virtually eliminate the possibility of car theft and reduce to zero the probability of penetration into it. More about this later in the article.
Car alarm - a device designed to protect the vehicle from theft, as well as from theft of objects that are in the car. The car owner and others are notified of unauthorized entry into the car by means of sound and light signals.
Today, there are such types of car alarms:
- Spaced - individual elements are located in several places in the car interior.
- Monoblock - the main elements are in one place.
Monoblock alarms are more compact and easy to install, but remote ones are more reliable, because in order to neutralize all alarm components, an attacker will have to work hard.
In addition, there are three main types of car alarms:
Car alarm, which is included in the basic version
The following components are included in the alarm package:
Depending on the cost of the device, the package may not include one or another element, which can be purchased separately. The same applies to central locking mechanisms.
Tools assistants, appliances, supplies
Tips pros, why you need to use a multimeter, and not the principle of "light" when connecting the alarm outputs
Never use the “light bulb” principle to find the wires you need. In the car, such a check can lead to the failure of the generator relay, the closure of the airbags and much more.
Light alarm, connection methods
The light alarm must be connected to the light of the main headlights or to the turn signals. In the latter case, it is necessary to find the direction indicator wires in the alarm switch, in the first case, the connection is made to the relay control wire. Practice shows that light alarm it is better to connect to the wires of the direction indicators, and not to the dimensions.
Car central lock, how to connect the signaling system to the central lock in accordance with the instructions of the car alarm manufacturer
Connection to the central lock is realized by various schemesthat depends on the design of the device. It is located in a car in a hidden place. To find it, you should first study the electrical circuit of the vehicle. Find the connection point - as a rule, this is the central locking control unit. It can be located in such places:
- At the driver's door.
- On the central dashboard.
- In the cabin there may be a central locking control button.
There are also such car models where the central lock is completely absent. In this case, it must be installed.
Car alarm, connecting door open contacts
The connection point to the door release contacts should be determined. You can find this point in electrical circuit to your car. To save time, you can also visit specialized forums and search for help there.
Alarm shock sensors how to make adjustment
Shock sensors should be mounted as rigidly as possible to the vehicle body to improve vibration perception. It is forbidden to mount them near the air ducts, since in this case the alarm will be triggered by the movement of air currents and with strong heating in the open sun. Sensors need to be fixed with self-tapping screws.
To carry out the settings, first disable the armed mode and enter the programming mode. All changes that will be made will be saved in the device’s memory. The sensitivity of old car alarms is regulated using a special screw, in newer models this procedure is carried out by buttons. The sensitive scale has several levels that determine the degree of alarm response.
When adjusting, the weight of the vehicle, the method of mounting the security system, and much more are taken into account.
Engine blocking with ignition wire
As a rule, the motor is blocked by the ignition wire coming out of its lock. Without removing the six-pin lock connector, ring it to find the ignition wire.
To connect, find the wire at which the voltage is plus 12 V, when the ignition key in the lock is on the label "ACC". When you turn the key to the Start state, plus should disappear. This wire should be blocked.
To determine it correctly, remove the connector from the lock and close the constant plus with a jumper, and short the starter and constant plus with a second jumper. If the car starts, then this is the same wire. In addition, as soon as the machine starts up, immediately remove the jumper. The cord must be cut, insert the connector, and then check. The vehicle should not start. Then disconnect the alarm and ignition wires. Just remember to install the relay.
As you can see, installing the car alarm on your own is quite simple, albeit a little time-consuming. It is worth noting that one of the most important points is the choice of car alarms. Since in our time the market for security systems is represented very widely, one should approach this issue with all responsibility. Choose only high-quality devices from well-known manufacturers, otherwise your desire to save money can cost you a pretty penny.
Before setting the alarm on a car, it is advisable to study all terms related to this topic. The manufacturer’s website often has instructions for connecting points. It’s difficult for beginners to understand such “documentation”. And to bypass the immobilizer, if the signaling is equipped with auto-start, it can also be difficult. You can connect the crawler yourself, for which there are recommended schemes, but not the fact that as a result, everything will work. Other common problems and methods for solving them are listed below.
The ignition lock module is supplied with several contacts, but the voltage from the battery always goes to one - to the “30th”. There is also a contact “50”, which closes with the “30th” during the start of the starter. Use this information when mounting a signalization on any car, even an old one. In modern cars, many chains are used:
Chains of standard ignition locks
In general, to set the alarm on the car, you need to know the designation of all contacts.
Car Alarm Installation, as well as repair Starts by disconnecting the battery. Then you canmost ring which contacts are connected to terminal “30”:
- Pin “15” is part of the IGN1 chain;
- “15/2” - IGN2;
- The contact in the ACC circuit is designated as follows: 2, ACC, R.
You can determine the purpose of the contacts yourself, for which you do not even need to start the car. Use an ohmmeter, but do not forget to disconnect the battery!
Carrying out repairs or installation with your own hands, it is enough to remove the "negative" terminal from the battery.
Electrical relay contacts
To install a car alarm and connect it, it is enough to use standard elements and modules. Among them, there may be a relay, to connect which is enough to study basic instruction. You can set the alarm on the car, connect it according to the "basic" scheme, and then supplement the set of functions by connecting a few more relays. Then one of the winding leads (contact 86 or 85) is connected to the signaling output, and the supply voltage is applied to the second output.
Relay Pin Designations
In the absence of current in the winding, terminal 87A is closed to “common” (from the 30th). When triggered, the other two contacts close (30-87). Forconnecting relay, if it is controlled by electronics, a diode is installed between terminals 85-86. Many people know howalarm settingbut for some reason they forget about using blocking diodes.
The diode does not conduct current when the relay is activated.Scheme will be as follows: “+ 12V” is supplied to the cathode. Use this information and performingrepair.
Kit offered with installation
For the signaling or forimmobilizer Premium, do not search online for documentation. It is believed that neitherrepairs nor the installation of such systemsdo it yourself no one will perform.
What you have to deal with
Often, the manufacturer himself provides the information necessary for the installation of car alarms to be completed. It is better when a file containing a photo report and a diagram is provided. But this does not always happen:
- Sometimes a list is given where the connection points of the signaling wires are listed. The presence of such lists suggests that you can and should do the installation, including with your own hands.
- If the manual contains a universal scheme, this is already good.
- A brand such as Starline provides a setup diagram and photo report. Of course, any photo report refers to a particular car model. And for most models there are similar manuals.
There are schemes that apply to cars of a particular brand. It is better to use them:
Difficult twisting
You need to get a few "braids", for whichhands divide the veins into segments.Photo report The above only illustrates the principle: in practice, a small number of segments are used (3-5).
Often, a diode is required to break the cable. “Power” diodes are suitable for power wiring, but Schottky diodes are installed in the signal circuit. Justification:
- With its internal resistances, the PN junction causes a voltage drop (up to 0.5 V);
- Elements with PN-junctions can not be connected at all, but then the cost of installing a car alarm will increase significantly (Schottky assembly at 10A costs 50 rubles).
Let's talk about mounting the relay. To connect these elements, you can use the "socket". But often to increase reliability, the wire is wound to the petals with your hands:
Relay Mounting
Our photo report clarifies the meaning of what was said.
If the current switched by the relay goes tobypass ignition circuit usesoldering. To connect the signal wiring, it is better to use "sockets".
Programming
Installation of car alarms is the first and not the most difficult stage to create security systems. It is followed by programming. DIY connections can be made without error. But then it turns out that the signaling does not perceive the commands given to it by turning the key. This happens if you use a photo report published by car owners as a guide.
For programmingimmobilizer installed in the car, the limit switch should be fixed, the click of which is monitored. And for the signals, the role of the limit switch is performed by the contact "15".
IN car alarm installation cost included and the cost of customization. So, you have to do its programming. If aconnection points to the lock module were not used, they act like this: inbypass the circuit indicated on the standard diagram and passing through the terminal "15", connect the wire with the toggle switch. The lever is then thrownhands to emulate key turns.
Contact emulation "15"
Nevertheless, it is better not to supplement regular schemestheir inventions in the form of toggle switches. Their presence may lead to the need for repair.
A set of important requirements
The housing of the bypass module of the immobilizer is usually made of plastic. And this is no accident. Such a module is placed away from the metal so that it does not block itself by its hints. Another thing is interesting: the image of the module, if installed, is usually not shown in any photo report.
After connecting the signaling, program any option and then remove the battery terminal. If the settings go wrong, most likely the main unit needs to be repaired. The video at the end demonstrates something else. It shows how easy it is to hack alarms. Based on this information, do not make selection errors.
Burglar resistance testing
The safety of a car, especially a new one, is a very urgent problem for a modern car owner. There are several ways to protect a car, the most popular of which is installing an automatic alarm on it. Installing an alarm system in a specialized center takes little time and guarantees the quality of the work. But there are also disadvantages. The first of which is high price works, the second - the use of standard schemes for equipment placement, connection and wiring. But if you have a simple tool and certain skills, installing a car alarm with your own hands is a doable procedure.
Car Alarm Kit
When choosing an alarm kit, you should adhere to the rule that the cost of it should be 3-5% of the cost of the car. Installation on a car worth 300 thousand rubles of a security kit of 150 thousand will be clearly unreasonable. To install the selected alarm kit on the machine you will need:
- automobile set of metalwork tools;
- wire stripper;
- heat shrink tube and lighter;
- electrical tape in the color of the insulation of the car wiring;
- a multimeter or other device for measuring voltage and conductivity;
- double sided tape;
- splenitis or regular foam rubber;
- electrical circuit of the car.
Installing an alarm with your own hands will require accuracy and patience, you will have to disassemble the front panel, steering column cover and other elements of the interior trim.
Installation of equipment
At the first stage of alarm installation, you should deal with the alarm itself, for which you should study the attached instructions. Next, you need to understand the electrical wiring of the car, which will require a circuit of its electrical equipment. The next step involves choosing the installation location of the control unit and the signal device. If everything is clear with the first, it is installed in the most inaccessible place - under the front panel, the second is not so simple. It is usually placed under the hood, but each model of the car in the engine compartment has a limited number of available places where you can easily install a siren. The harder it is to get to the sound source, the harder it is to turn it off. When disassembling the front panel and steering column cover, plastic clips can be used, therefore it is better to use special plastic mountings for installation. This will protect the skin from damage.
To set the alarm you have to disassemble part of the dashboard
Mains connection
The alarm outputs must be connected to the direction indicators or the side lights of the car, to the bulb responsible for indicating the opening and closing of doors, as well as to the indicator lamp of the wound motor. If the panel of your car is optitron, then the only thing that can be connected is the turn signals. In order to install the wires, on back side the panel you need to find the lights that are responsible for indicating the inclusion of turn signals. We find a board of bulbs, tracks are applied on it. You need to find the 12-volt contact and check it, for which we connect the connector to the track, turn on the turn signal and throw the multimeter. If you find the required wire, the multimeter will indicate the presence of voltage at the moment when the indicator lamp lights up.
Note! The search for wires using the principle of "light bulbs" is unacceptable when working with the car's electrical system. The use of this method can be expensive for the car owner, because you can easily disable the entire power system of the car.
Actually, we are looking for the wire responsible for opening and closing doors according to the same principle. When the car door is open, the multimeter should be 12 V, and therefore, when closed door - equal 0. We find the control wire for starting the motor using the same method. However, if the tachometer takes over this function in your car, then you won’t be able to test it this way.
The alarm connection scheme provides for the connection of the control unit and the central lock of the car. This is best done by connecting to the lock enable relay. We will search for it by analogy with the previous steps.
Wiring
When laying alarm wires, they should be assembled in directions in bundles and wrapped with electrical tape. The electrical tape should not differ much from the factory insulation of the wires. This greatly complicates the hijackers finding wires that need to be cut. In addition, the use of electrical tape serves as additional insulation for wires, increasing reliability. The wires to the connectors are best soldered and insulated with a shrink tube, and then wrapped with electrical tape. When connecting wires, you can use special clamps, but their use significantly reduces the time it takes to determine the hijacker of the desired wire. When laying wiring under the hood (connecting the limit switch and siren), you should lay the wires along existing bundles of electrical wires, making them less noticeable.
Right installed alarm help protect your car from breaking
Powertrain Lock
Installing an alarm on a car also means blocking the engine during unauthorized starting of the machine. Most often, the ignition switch connector is used for this. To determine the desired connector, you need to ring the lock. The wire is selected that has voltage when the switch is in the "ON" position, and disappears in the "Start" position. To block the engine, remove the connector from the ignition switch and close this wire with a jumper to a constant plus, and a second jumper with a constant plus and a starter terminal. If the engine starts, then remove the jumper on the starter, the car is muffled and the wire found is cut. Next, the alarm wires and the cut ends of the wire are connected. The insulation of the compound should be carried out using heat shrink tubing and the same electrical tape.
Installation of car alarms on the example of the VAZ 2110
Installation of car alarms in a VAZ 2110 car can be divided into 2 levels: installation of all elements of the alarm system and connection to the vehicle’s electrical circuit. Perhaps the most labor-intensive work is the installation of electrical wiring in the doors and trunk of the car.
It looks like a central alarm unit with wires connected to it 
This is a shock sensor (shock sensor) connected to the central alarm unit 
It looks like a wiring harness connected to the unit leading to the sensors for opening / closing the trunk and hood, car doors, as well as a siren and lighting equipment 
If the central unit of the alarm you have selected has only one block, and you need to connect two sensors, connect in parallel
The process of installing an alarm on a VAZ 2110 car
- The hood and trunk opening sensors are mounted so that a short to ground occurs at the very beginning of the opening.
- To install the hood opening sensor, do additional mount. For this, we use the plate for fastening the electric door lock.
- After fixing the bracket, insert the sensor into it, adjust it in height and fix it in the selected position using the lower nut. Armed with an ohmmeter, we check how reliably the sensor is connected to the "mass".
- Similarly, the installation of the sensor for the trunk.
- As practice has shown, it is best to mount a siren under the hood on the connector of the right mudguard. Do not forget that the mouthpiece is better directed down to prevent moisture from entering it.
- The shock sensor (shock sensor) is fixed under the dashboard using self-tapping screws.
- The microwave sensor is best placed in the central part of the car. Well for this purpose installation is suitable instead of the standard rear ashtray. The ashtray must be removed, remove its holder and install the sensor in it. Sensor wiring is routed in the center tunnel lining. The sensor mount must be reliable so that it can perceive all body vibrations well.
- The central unit is installed behind the injection controller.
- The last step is the installation of the pager transmitter. We fix the sensor to the defatted windshield, having previously removed the film from it. The wiring from the sensor is hidden under the windshield pillar trim.
We make the bracket from the plate for fastening the electric door lock 
We fix the bracket 
Insert the sensor into the bracket 
We fix the sensor 
We check how reliably the sensor is connected to the “mass” using an ohmmeter 
Similarly, we install the trunk opening sensor 
It is best to mount a siren under the hood on the connector of the right mudguard 
Remove the ashtray 
Install the microwave sensor in the ashtray holder 
The central unit can be installed behind the injection controller 
The pager transmitter is attached to the windshield
We connect the wiring in accordance with the scheme attached to the alarm you selected.
Check
The installed car alarm is checked in all operating modes, it is configured for itself. When checking you need to consistently open all the doors, trunk and hood. When each element is opened, the burglar alarm should be triggered, and the engine should be blocked when an unauthorized attempt is made. It is also necessary to adjust the sensitivity of the shock sensor. To do this, there are holes in its case in which small bolts are visible under the Phillips screwdriver. As you can see, in order to set the alarm yourself it will take time, a simple tool and a little courage.
To summarize
- Installation of wires should be carried out as discreetly as possible; existing harnesses can be used;
- The siren is installed in the most inaccessible place;
- Wires should not be under constant voltageit may cause a fire;
- When the engine lock is triggered, an error should not appear on the instrument panel; a blocked circuit can be easily detected on it.