Installing a car radio on a car with your own hands. Connecting a radio with do-it-yourself installation in a car (pinout of ISO and mini ISO audio system connectors) Connecting a tape recorder in a car with your own hands

Content:

Modern cars are equipped with a developed audio system, including a radio, an audio player equipped with disk drives and USB inputs for listening to music from external media. The most complete configurations in this regard usually contain a video player and a navigator with a screen of 7–8 inches. In addition, there is Bluetooth, through which you can connect a smartphone and, during a trip, connect with subscribers and talk without looking up from the helm. At the same time, the musical component is immediately modestly dulled in mute mode. Of course, speakers, a stereo system that sounds both from both sides - from the speakers installed in the doors, and from the rear.

So, full-sounding music, and even in the enclosed space of a car showroom, which, with the current design, has a completely musical form like a guitar soundboard, richly resonating at different frequencies and in different directions, turns practically into a small philharmonic hall on wheels. Especially when you consider that companies producing modern cars and taking care of its maximum comfort, the acoustic parameters are also designed for the most complete sound across all the usual frequency ranges - medium ( regular speakers), high (high-frequency speakers, low-frequency speakers, subwoofers. Ride for yourself, listening to enchanting sounds during a long trip. Or relaxing in nature. Or fishing. Or spending the night on a camping trip somewhere on the shore of a quiet lake, or in a small cozy mountain valley with quietly murmuring waterfalls...

Music is a part of our lives, so many who bought a car without this essential addition may very soon feel a certain vacuum of sound content. And for this reason, they can begin to search for an acceptable solution. Of course, if you are not complete fans of the surrounding undisturbed primordial nature, to which only wild nature sings.

Of course, since the time has come to add audio equipment to the car’s equipment, then it must be integrated into the entire technical complex accurately and organically.

Electrical network of the machine

The overall electrical network of a car, of which the car radio connection diagram is part, previously simply called the “ignition system,” has long become much more intricate and expansive. Its tasks are:

1. Start the engine from the battery.
2. Apply voltage necessary for the engine during operation (ignition).
3. Recharge the partially discharged battery from the generator, which has begun to produce voltage.
4. While driving, power the energy supplied by the generator and lights (headlights, turn signals, brake lights...).
5. Ensure the operation of the instruments on the panel.
6. Power up additional equipment.

Two points are important in her work:

1. When the car is parked with the engine turned off, the power source is the battery, which tends to discharge. Therefore, it must be used at this time in such a way that there is energy left to start the engine.
2. When starting the engine, the battery supplies the starter with a large D.C., which discharges the battery very intensively, and, in addition, can produce large voltage pickups in the entire electrical circuit. For this reason, all other equipment, including the power supply to the radio, must be turned off at this time to avoid burnout.

These points are taken into account during the factory production and installation of the car’s electrical equipment, so to connect something new, in particular, a car radio and speakers, it is good to use the connectors already available for this, rather than pulling wires directly from the battery. In addition to the danger of damaging the radio, there is a risk of discharging battery during parking, since the connection diagram of the radio may be as follows: during a normal power off, it may be powered by idling amplifier, why can you after long-term parking car in the garage suddenly discover its completely discharged battery.

How to connect a car radio

Standard radio equipment is connected to the vehicle electrical network under dashboard, which is what you need to take advantage of. Even if the purchased car is not equipped with a radio, the connector for its connection is currently installed on all cars. If it is missing (for an old car), you can purchase it yourself and, knowing how to properly connect the radio, do it yourself, using the markings of wires and contacts.

The connector is made according to the international ISO standard.

It includes car radio connectors:

If the radio connector is different, then it may come with wires, namely an adapter, for example, like this

If the car connector (on an old car) differs from the standard ISO, then adapters are also sold, for example for Mazda 2001.

By combining them, you can also achieve success. Please note that in the figures above, one of the ISO connectors is “female”, the other is “male”. By plugging them into each other, we get wires for a non-standard car radio for an old car.

The connector consists of two sections - A and B. Section A (black) is for power wires, section B (brown) is for signal wires. 12+ only yellow is considered the input power wire. Blue supplies 12+ power to the antenna, and red serves to open the circuit when the ignition is turned off. Black - mass.

On the left is the “mother”, the wires from which go to the car’s circuits, and on the right is the “male” wiring, which comes from the radio. That is, the wiring on the “mother” will be mirrored in relation to the wiring on the “father”.

Here the main power goes from the battery through the yellow wire to pin A4 of the black block. It never opens. And there is also battery power, but via the red wire. It goes through the ignition key, and when the car is turned off, the radio will not work either. This, of course, makes sense - taking care that the battery does not run out while parked. But there is also some inconvenience. We stopped for a picnic, but the music is as silent as a fish.

You can overcome this if you make a branch from the red wire to the yellow one and install a small switch on it. Then the main mode of operation will be with the usual opening after turning off the ignition key, and if you click the switch, the radio will work in the parking lot. To disconnect the red wire from the yellow one, you can come up with a special relay that resets this switch when the ignition key is turned on. This way we will ensure the correct connection and safe condition of the battery in the garage, even if we wanted to listen to the radio when the engine was not running on a trip, and then forgot to turn off this lever.

If there is no such relay, it doesn’t matter; when parking the car for a long time (in the garage, near the house), it will be enough to manually open the switch.

The brown block contains contacts that transmit an audio signal to the car speakers:

• white - to the left front (FL), B5, B6;
• gray - to the right front (FR), B3,B4;
• green - to the left rear (RL), B7, B8;
• purple - to the right rear (RR), B1,B2.

Wires of the same color are positive, wires of the same color with a black stripe are negative.

To connect the car radio, the diagram is shown below

Sequence of actions

1. Studying car wiring. Searching for an answer to the question: what is already in the car and is there a ready-made connection for the radio? Deciding what actions need to be performed, what missing parts to purchase and install.
2. Preparing for installation. The covers are removed, freeing access to installation sites (for example, speakers or speakers). The places for laying the necessary cables and connecting the speakers are being prepared. The necessary fittings for fastening are being prepared.
3. The installation site for the radio is being prepared. This may be a regular place, or you need to come up with something special. Previously, in old cars, the tape recorder was often mounted on some kind of brackets held on by self-tapping screws. But now, thanks to widespread unification, there is a chance that the radio will fit right away or with a little modification to its standard location. And connecting it will be a matter of two minutes.
4. We connect the wiring. Special attention When connecting, we pay attention to the integrity of the wires, the quality of the contacts - at low voltage this is of significant importance - and insulation. We always remember that one of the supply wires - red, yellow or blue - is insulated, and the second wire - black (ground) - is actually bare - this is the entire metal part in the car. This is not scary for us, but for a battery, short circuiting its wires is very unsafe. And, most importantly, such an incorrect circuit is a short circuit, leading to instant overheating of the wires and easily leading to a fire.

Generally speaking, everything is quite simple and accessible to do with your own hands.

Tools and materials

To do this you will need a knife, a screwdriver, and electrical tape. It is advisable to use stranded copper wires. The supply wires can be taken with a larger cross-section - 4 mm, and made into a separate twist. It is better to take the wires that supply the acoustic signal to the speakers from oxygen-free copper, specialized acoustic ones, with a cross-section also up to 4 mm. This is because speaker impedance is low and most of the amplifier's power can be dissipated in the wiring rather than in the speakers, resulting in poor sound quality and wasted power.

The reliability and quality of the contacts is very important; they must be thoroughly cleaned and soldered. Isolation also plays a big role. Silicone insulation provides beauty, strength and reliability. It is advisable to keep the colors of the wires the same as in the pinout diagram, or choose similar shades, so that there is less chance of confusion.

How to connect speakers

The radio can also operate on its own speakers. But without external speakers connected to the radio, this sound will be a “whisper”. Therefore, the crowning achievement of installation efforts in the car speaker system speakers will be connected to it, even if they are Chinese.

If the car is not equipped with a radio, then most likely there are no speakers, although modern cars They are made in such a way that there is still room for their installation and wiring. So it will tell you the path where you need to insert the speakers. To do this, you will need to remove the front door covers, install the speakers, connect them and put everything back in place. For new speakers, it is often necessary to replace the wiring with a new one that matches them. If so, then it is best to use acoustic wire with a cross section of 2–4 mm 2. And carry it out using the “expensive” old wiring. To connect, it is best to use the speaker connectors and select connectors on the wires for them. Don't get confused with polarity, this is important.

A car radio is an essential attribute for almost every driver, because listening to your favorite music lifts your mood and distracts you from unnecessary thoughts. Some motorists are content with the original factory player, but particularly demanding music lovers require a new, modern one, with an additional amplifier, speakers, and other accessories. In addition, the radio may fail or become obsolete. This is where the question of replacing this unit with a new one arises.
It should be noted that all drivers are divided into two groups of users: those who trust all processes, even the smallest ones, exclusively to service station specialists, and those for whom it will not be difficult or difficult, including equipping the car with a new radio, alarm system, and other systems.

Selecting a radio.

Radio tape recorders are different, and not only in design and number of functions, but also in size. Single-din (1DIN), or single-block car players are the most common in our time; they are installed mainly by European automakers. As for the American and Japanese manufacturers cars, then they mostly install double-din (2DIN), or models with two blocks. Recently, due to the active development of the multimedia market, the demand for dual music systems for cars has increased, because a large radio tape recorder can accommodate many different functions, and openings for disks and USB drives. Please note that the range includes radios that are sized only for a specific car model. Choose a car radio from a reliable manufacturer; do not be tempted by the price of cheap options; usually they are of low quality and short-lived.
So, the radio has been selected. Open the box to view the device's contents. As a rule, the following are included with the radio itself:

• instructions detailing how and where to install the radio;
• wiring;
• set of acoustic systems.

If desired, you can immediately purchase additional equipment, for example, a subwoofer, equalizers, amplifiers.

How to install the radio correctly.

1. Read the instructions for connecting the device. Make sure the installation diagram is clear to you.
2. Carefully remove the necessary part of the instrument panel to gain access to the player installation area. Unscrew the mounting bolts and remove from the niche old radio. Leave fasteners for fixation new radio.
3. To secure a new device, two methods are used - front mounting using a special frame, or side mounting. To install the car radio using the first method, remove the frame from the device body and install it in a special niche in the center console of the instrument panel. Unscrew the metal teeth so that the frame is securely fastened in the socket, connect the radio to the plug, and insert it into place. As for the second method, to fix the player, secure the block with the existing bolts, holes for which are located in the side parts of the device.
4. When installing the radio yourself, take care to carefully appearance devices in the instrument panel. As a rule, the installation kit contains a decorative frame that is attached to the panel and hides possible minor defects created during the work process. If you need to install a 1DIN radio in the hole created for a 2DIN radio, the empty space can be filled with a special shelf or a frame with plugs.

Connecting the radio.

The player can be connected either using wires, but without connectors, or using ISO connectors.
A very important point in the entire procedure for installing a radio on your own is the type of connection connectors that your car is equipped with. In fact, there are three options, it all depends on the brand of car:

• ISO connector;
• another connector developed by the automaker's designers.
• lack of connectors and wiring.

In the third case, if there is no wiring, you will have to stretch it yourself, removing the upholstery of the car. The car's wiring system provides for the connection of positive wires to the head units, and the yellow wire is always energized and is responsible for the memory of settings, and the red wire is responsible for powering the mechanisms, and is de-energized when the engine stops running, so that the turned on radio does not cause the battery to discharge.

If the car is equipped with a wiring system with ISO connectors, then connecting the radio is very simple - you just need to connect the mating parts of the device and connectors, and also insert the antenna plug into the corresponding socket. According to the ISO standard, there are two types of plugs: black, which is responsible for powering the radio, as well as its additional functions, and brown, which provides output sound signal to the car's sound system.

In cars with non-standard size connectors installed by the automaker, you will have to cut off the connectors and connect each wire separately, or install adapters, which are usually included with the player. Installing adapters not only increases the safety of the radio, but also makes it easier to connect new devices in the future. When connecting wiring, you should be especially careful, because incorrect connection can lead to a short-circuit in the system.

Some manufacturers provide “standard audio preparation” in their cars, that is, simplifying the connection of the playing device and speaker system. Before installing the radio in the car, the car buyer should clarify how this simplification was made: by laying the wiring, or by installing acoustics, rear or front. After successfully installing the radio in your car, before putting on the instrument panel cover, be sure to check its functionality.
Thus, installing and connecting an audio system to your car is as easy as .

Installing a radio - video instructions

For good, high-quality sound In a car, not only the acoustics need to be replaced. The primary source of sound is still the head unit (car radio). Therefore, installing car radios will help you achieve a properly balanced and decent sound from the audio system in your car.

All car radios are divided into 2 types: 1Din and 2Din car radios. There are no other "standard" sizes anymore. Single-din radios are CD-MP3 receivers that have been familiar to all of us for a long time and can be installed in any car.

Double-din car radios are a full-fledged multimedia station that combines a large touch screen, the ability to watch DVDs, connect a rear view camera, have navigation, output to additional monitors in the car, and so on. In other words, these are advanced technologies in modern car audio. Connecting car radios of 1din and 2din sizes occurs differently.

Installing 1Din and 2Din car radios in most cars existing today requires a special transition frame that allows you to close the resulting technological gaps. In some cases, a 1din size car radio is connected without such a frame.

In each car, the standard car radio has its own “size”, which differs significantly from the recognized world standards 1Din and 2Din. Standard head units can be either 1.5 Din or 1.8 Din, and they can also differ in shape: rounded, oval, tapezo-shaped, etc. Therefore, the installation of car radios in most cases requires the presence of a certain transition frame.

When installing a modern car radio, you will also need a special ISO adapter connector. The thing is that each car brand has its own connection and wiring standards. Therefore to standard car radio A standard connector is connected, through which the power supply and signals for sound playback are organized. To avoid cutting the standard wiring, we use special adapter connectors for each make of car.

Professional installation of car radios requires not only certain skills, but also knowledge of the devices of a particular car. Thus, if there is a standard amplifier in the car, when installing a new radio, it is necessary to either bypass or start the standard amplifier. Great value when installing car radios, it has the resistance of standard acoustics. There are cars, mainly from American and German automakers, that install 2-ohm speakers as standard. Under no circumstances should such acoustics be connected to a modern car radio, since the latter “supports” only a 4 ohm load. If such a connection to the car radio takes place, then the purchased innovation (radio tape recorder) will work in “overload”, which will lead to its inoperability. In this case, it is necessary to change the acoustics.

We provide professional installation of car radios in any car. By contacting us, only time-tested components will be installed in your car, which will bring all the positive emotions to the owner of the car!

Car radio installation price:

• Car radio 1din from 1500 rub.
• Car radio 2din from 2500 rub.
• Car radio with on-site monitor from 2500 rub.

Installing a radio in a VAZ

Today you can find almost any speaker head unit on the market. Different prices, different needs and finally, a car radio is purchased.
Almost every one of them today is equipped with a radio receiver and is capable of reading discs of any format. And if the choice of a head unit is not a problem for many, then installing a VAZ or other car radio becomes real problem.
In our article we will look at how car radios are connected. Installation on a VAZ 2107 or another model should be easy and quick if you study everything that is presented below.

Installation

Let's start our story from the very simple way. This approach is completely justified, because it is impossible to learn complex installation options right away and you need to start from the simple.
Before purchasing expensive equipment, you should decide on the choice of installer. If you intend to carry out such an operation on your own, then you need to know many secrets.
On the contrary, an inexpensive device is very easy to connect and there is no need to spend money on the services of a specialist. So, what does a typical speaker system consist of?
Of course, the main role here is occupied by the car radio, the installation of which we will install. But don’t forget about the four standard speakers that come included. You will need to connect wires from the head unit to them.

Note. All speaker components are installed only in places designated in advance by the automaker. This is done not only for the sake of simplicity, but also to avoid short circuits.

Starting the installation process

First of all, you should check the wires of the power supply, each of which should have its purpose written on it.
The wire can simply be painted a certain color:

• The red color of the wire will indicate a cable implying power supply of plus 12 V when the ignition is on.
• Yellow will mean constant feeding.
• The blue wire is the power going to the antenna.
• The orange wire is for controlling the backlight.
• The black wire is always negative.

Let's consider installing a head unit, which, in addition to playing CDs, is also equipped with a radio receiver:

• We study the block for connecting speakers (see). It consists of 8 plugs. Each speaker has two plugs. It turns out – 4 speakers x 2 = 8.

Note. The speakers can be installed as follows: two in the front doors, two in the rear parcel shelf.

• We are studying the player's power supply, which consists of 5 plugs.

Note. This does not mean that it should always be this way. There are different power supplies and they may have different quantities plugs: 5, 8, etc.

The connectors for connecting speakers and power are traditional. In other words, they (the plugs) have a specific purpose.
In our case, it is assumed that these pads are included with the car radio and there is no need to buy them separately:

• We purchase special connectors, which are very important when... Such components a priori eliminate the need to use soldering.
  These components are designed to connect an additional wire to the vehicle wiring. Typically, the connector has two channels: the main wire goes into through hole, and the additional one is deaf.

Note. In the contact part of the connector there are two slots for clamping the conductors through which current flows.

• As for the insertion point into the standard wiring, you can find it using the electrical connector diagram.
• After you have inserted the connector into the car wiring, you need to check the voltage plus 12 V and ground.
  This is done at the corresponding contacts of the block. We use the simplest probe - a 12 V car light bulb with two connected wires or a special one.

• We connect the wire blocks for the amplifier (which were not or will not be used during installation) with insulating tape.

Note. The wiring harness is a kind of block, it should be made in such a way that the wires for connecting the player are pulled out from there without excessive tension.

• Now you need to thread the wiring harness for the player and antenna through the special slides of the head unit.
• We insert the slide into the socket of the instrument panel console.

Advice. The slide must be installed without any distortion. Thus, the outer flanging of the slide must fit tightly to the edges of the player’s socket.

• Take a suitable screwdriver and bend the mounting brackets of the slide. We make sure that the sled sits securely in the nest and does not wobble.

• While we are not in a hurry to install the car radio, we once again check the voltage and ground on the required contacts of the power supply with a homemade probe.
• We connect the antenna cable to the radio.
• We also connect the remaining wires.
• We insert the radio into the socket of the instrument panel.

Connection diagram for car radio on VAZ 2105

At this point, the operation of installing the radio with your own hands can be considered complete. It won't hurt to use other step-by-step instructions.
In addition, it is important to look at photos and video materials during the work process. A priori price self-installation will please everyone, because in comparison it will be several times lower than what specialists will have to pay.

Not every one basic equipment a car of a certain make and model includes car radio. And even if you purchased a car with a radio, it is far from a fact that you will like it and be of suitable quality. Thus, installing a car radio in your car will never harm you. In fact, this is not difficult to do, all you need is a connection diagram for the radio and desire, as well as the information below.

What types of car radios are there?

To install the car radio yourself, you need to know the purpose of all the plugs and wires at its outputs. In addition, there are two types of radio tape recorders, which differ in format.

A single-block or single-din radio is more common here and in Europe.

Double block or double din are more common in America, Korea and Japan.

A two-block radio is larger in size than a single-block radio, which allows it to incorporate a greater number of multimedia functions.

When choosing and purchasing a car radio, keep in mind that it must match the make of your car.

Learning to distinguish between plugs

The plugs, like most others, have their own markings according to international standards. ISO marking installed for the manufacture and production of car radios and car wiring. If you use this equipment for other than its intended purpose, it will very soon fail.

Each audio manufacturer produces its own adapters to ISO standards, so there are a huge number of different adapter plugs.

How to connect a car radio - use your car brand's own plugs. Each brand of car is characterized by special plugs and adapters, with which you can switch from the original pads to the ISO standard.

If you are the owner of a car with standard wiring, then you do not need to bother with plugs and conductors, but just connect the car radio to it.

Radio installation steps

As you know, the main source of electricity in a car is the battery, but at the same time it can become the radio and speakers. How to connect a car radio without unwanted consequences? First of all, when installing audio equipment, do not allow the positive of the battery to touch its negative or any terminal of the speaker.

Also, you should not be powered by the plus or minus from the ignition switch or cigarette lighter; you always have the radio connection diagram in front of you, so power it from the battery! This will rid the speakers of interference and interference and drive them to full power.

To connect the plus, use a stranded copper wire, as short as possible, with a cross-section of 4 square millimeters or more. It requires a fuse with a rating of 10–20 A and good insulation. Mount it 40–50 cm from the battery terminal. In some cases, the manufacturer independently installs the fuse, which is very convenient for consumers.

Also try to find the negative wire as short as possible.

For convenience, you should use terminals with markings or different colors.

When laying wires, try to maintain as much distance as possible from other electricity consumers. Remember, the wires should not be twisted, they should be handled very carefully and carefully. First they are connected to the speakers, and then to the car radio. You should beware of the bare plus one touching anything else. Keep it isolated until you need to power the radio with plus.

How to connect speakers

The process of connecting speakers to the car radio requires special attention. Throughout the installation of the audio system, you should have the radio connection diagram at hand. It shows the correct connection of the speakers, which corresponds to the phases. There are markings on the speaker terminals indicating plus and minus. With its help, you will very quickly and easily figure out where the minus is and where the plus is.

Most often, audio system manufacturers make the wide terminal positive and the narrow terminal negative. Sometimes older cars do not have such markings, so use a regular battery to determine the poles. To do this, connect the plus and minus batteries to the speaker terminals. If the diffuser moves outward, then the phasing is correct; when it moves inward, it is incorrect.

Attention, connecting to the wrong phases leads to an 80% loss of sound quality . First, your speaker will fail, and then the radio itself. Unfortunately, this is the most common mistake made by car owners who installed the audio system themselves. At the same time, there is sound from the speakers, but there is not enough power.

Let's imagine that there is no free battery at hand, how to connect the car radio to the speakers correctly in this case? It’s very simple to turn on the radio and output sound to one of the speakers, turn it up to maximum. Next, distribute it equally across both columns. If the sound power increases, then you did everything right. If this does not happen, change the polarity on one of the speakers. This method is suitable for testing both front and rear and side speakers.

Important: When connecting speakers to the radio, observe the polarity and use insulation!

Wiring selection

The speaker wires of the car radio are also marked. There may be two or four pairs. A single-color wire without a black stripe indicates a plus, the same wire only with a black stripe indicates a minus. The first one is connected to the wide speaker terminal, and the second one is connected to the narrow one.

For a pair of side or front speakers in acoustics up to 20 W, the minus can be common. systems, each channel has its own minus or plus. They cannot be swapped or confused! Under no circumstances should you ground the speaker by connecting its negative terminal to the machine body. This will result in sound distortion.

Video - Auto acoustics in the car:

Low-power radios with manual radio tuning may include two or four colored wires and not a single pair with a black stripe. In this case, the negative of all speakers is connected to the negative wire of the radio, which is led to the negative of the battery or to the body of the car.

Remember short circuit threatens not only to damage the audio system, but also to cause it to catch fire, which is much worse.

When installing a radio at home, it is worth considering that almost every speaker system comes complete with connecting wires. They are not suitable for use in a car and are only needed to test the speakers upon purchase. They are characterized by a small cross-section of 0.25–0.5 square millimeters and will not be able to transmit power from the radio to the speakers without loss. You can use them only if the power of your speaker is 15–20 W and its diameter is 10–13 cm.

For main speakers high power(40–100 W) use special speaker wires with oxygen-free copper. They are characterized by a cross section of 1–4 square millimeters. On their transparent insulation you can see arrows pointing in the right direction from the car radio to the speaker.

Isolation is required

High-quality wires must have a good insulating background. It is best if it is made of silicone, as it will not burst in the cold. In addition, make sure that the cross-section of the wires corresponds to the power of the audio system. Lay the wires away from the wires of other consumers. Do not allow them to curl. They are laid closed throughout the cabin.

It is important that the wires do not fray. Limit their availability and do not allow them to come into contact with passengers' feet or luggage. From the door pillar, pull them through the hard cambric. In this case, the hinge should move in the body behind the door pillar. The main thing is that she does not make movements between the door and the counter!

How to position the speakers

It is very important when installing high power main rear speakers that they are placed correctly. For example, high-power oval speakers should be installed on the rear parcel shelf so that the short axis of the speaker is directed diagonally across the car, namely the rear right - and the rear left - towards the passenger. Only after correct placement begin to connect the speakers to the radio.

For good sound, do not cover the speakers with boxes or drawers. They need space, and quite a lot of space.

Place tweeters or, as they are also called, “tweeters” on stands windshield. The quad effect will be very bright if they are far enough away from the woofers. Direct the sound from the driver's tweeter to the passenger and vice versa.

When installing the speaker system in the cabin, carefully, carefully and securely fasten the wiring.

Video - installing a car radio using the example of Daewoo Lanos:

Let's sum it up

So, it is absolutely possible to install the car radio yourself. At the same time, you won’t spend too much time, but...

The main thing to remember:

• use only insulated wires;
• carefully read the radio connection diagram;
• lay the wires carefully, without bending or twisting;
• Before connecting the speakers to the radio, set the phasing;
• Use marked wires only for their intended purpose.

If you strictly follow the above instructions and tips, you will definitely do everything right. If you doubt your abilities, either call a knowledgeable friend, or go to a car repair shop.