Pinout of the towbar socket wires. Wiring diagram for trailer connection

Every year the number of motorists who install a towbar on their cars is growing. This is due to the fact that:

the number of organizations providing trailer rental services is increasing;
travel with campervans (caravan trailers) is becoming popular;
the number of owners of hydro and ATVs is growing;
carriages are widely used for transporting vehicles.

Also, many motorists install towbars and universal electrical connectors (sockets) "just in case", suggesting that in the future they may use trailers.

Consider the connection diagram of the towbar socket, so that later, without any problems, you can connect any tool on a rigid hitch.

Types, pinout and connection diagrams of the towbar socket

Several types of connectors are used for connecting trailers:

Semicontact (7 pin) connectors of the European type;
seven-pin (7 pin) American-style connectors;
thirteen-pin connectors (13 pin);
special connectors.

The most widely used 7-pin European type connector is found on most light vehicle truck trailers. Its scheme and appearance shown in the figure:

The peculiarity of the connector is that the receiving and its counterparts have both types of sockets (“male” and “female”).

This is for the sake of safely wiring the round connector in zero visibility conditions. It is almost impossible to install incorrectly or short-circuit the sockets with such an arrangement.

Each of the connector pins has a distinct purpose. The table shows the minimum cross-sectional area of the wires that are used to connect to the required element of the circuit.

Contact # 2 in many trailers may not be used. It is used to provide a constant + 12 power supply on light trailers.

Some motorists ignore the separation of right and left side lights, combining them schematically into a single wire. A slight "simplification" of the wiring leads to a violation of the "light parking" function (when the turn signal is turned on, the dimensions of the corresponding side light up in the parking lot). This function is used when parked on the side of the road.

Pinout diagram for 7-pin American connector:

A feature of the connector is the presence of a reverse contact and the absence of separation along the right and left rows of parking lights.

In some models of American cars, there is no separation of side lights and brake lights (they go along the same wire).

In many cases, the set of towbar connectors already includes conductors of the corresponding color and size.

This greatly simplifies the electrical connection process.

13-pin connectors are used to connect light trailers.

The main difference of this connector is that there are several contacts for negative and positive buses, backup contacts for connecting additional devices (for example, a rear view camera).

A feature of the connector is that large currents can flow through its contacts, in particular, for powering household electrical equipment, charging an additional battery.

Special connectors are sometimes used to connect to boat equipment. In this case, standard adapters are provided:

Modern trailers of a higher class have their own electronic equipment: ABS, ESP systems, on-board computers. Their interfacing with the vehicle's on-board system is also carried out with special connectors.

Features of the circuitry connection of the towbar connector in modern cars

In cars before 2000, analogue control circuits for rear lighting devices were used. The greatest difficulty in connection is the correct determination of the place of inclusion of the corresponding conductor.

This work was performed by many motorists by the "poke" method, connecting in series the contacts of the trailer connector to the indicator lamp. With the advent of digital control circuits for lighting devices and other electrical equipment in a car, this method has become dangerous.

Video - connecting the towbar wiring on the Nissan Note:

Digital control of electrical equipment assumes that thick conductors for rear dimensions, feet and other lighting devices do not go directly from the steering "dragonfly", "frog", relay and other switches to the lighting devices. This is where the supply voltage and digital control signals go.

A simple twist-type connection to the rear light conductors is inappropriate here. Even if you connect directly to the rear lights, which are now mostly LED, it is not a fact that the electronics will not give an error message and turn off these lights altogether, since the current consumption will be exceeded.

In this regard, matching units are used to connect the towbar electronics in modern cars.

They are completed with a set of necessary conductors, a connection diagram. The description of the matching blocks should contain a list of cars with which the block is compatible.

There are schemes on the Internet homemade devices... If you want to experiment, you can purchase an inexpensive radio amateur kit:

The connection diagram of such blocks is shown in a generalized form. You have to determine the specific wire routing yourself.

Video - UniKIT 2 connection diagram for Baltex towbar:

The procedure for electrical work when connecting the towbar socket

1. The first stage of work: determination of the connection diagram, the need to use a matching unit, the choice of the type of connector.

If at the time of the installation of the trailer connector, the latter is not yet available, or it is not planned to buy it at all, it is supposed to use only rental means, it is recommended to immediately install the 13-pin universal connector.

Video - why a 13-pin towbar socket is preferable in some cases:

In this case, using a 13/7 pin adapter, you can connect a regular cargo trailer without any problems.

There is, of course, the opposite option - adapter 7/13, but some of the user connections, including those, will have to be carried out outside the connector, which is very inconvenient.

If you have a car before 2000, it may not be necessary to install a matching unit. In this case, the rating of the fuses serving the turn signals and rear lights should be increased by 25%.

This can be avoided only in the case of using a rental trailer, they are checked by the lessor, and is responsible for performance and safety.

Before signing a trailer lease agreement, the lessor must check ALL functions of the lights and other devices of the car-trailer connection. In the absence of any signals, he MUST not release the trailer on the voyage.

Most typical malfunctions electrical equipment of the trailer:

"Rotting away" of electrical wiring, especially in the area of connections, contacts, rations;
short circuits in the area of rubbing parts;
failure of light lamps;
large leakage currents associated with the salt coating of roads and entering water bodies (boat trailers, especially on the sea coast).

3. At the third stage tracing scheme is being developed(what wire, what color, what section, where it goes, how it goes, where it connects, what it connects to, and, finally, how it connects).

In order. If the purchased trailer connector is equipped with conductors, there is no point in replacing them. Otherwise, you should choose conductors in exact accordance with the colors and cross-sections shown in the figures above.

It is most difficult to determine the path of the wires from the connector to the inside of the luggage compartment in such a way that it is invisible, the wires could not be damaged during operation and cause a short circuit, and the tightness of the cabin was not broken. In most cases, manufacturers provide a standard hole.

Connections can (and better) be made using the standard method: stripping + twisting + soldering + heat shrinking. All connections must be made at least with the ignition off. There is a connection option using special clips.

Such connections do not provide high currents, are not so durable, but in some cases they can be used when using cargo trailers.

For further action a minimum set of tools and accessories is required:

a set of locksmith tools for dismantling and installing interior elements in the process of laying cables;
a set of electrical tools, if necessary, a soldering iron, solder, flux;
wires, electrical clips, self-tapping screws, cambric, heat shrink, electrical tape, clamps;
multimeter;
control lamp;
mirror (when installed alone).

4. Connection... At this stage, it is necessary to be as careful as possible, it is better to sign each connection first, and only then do the electrical installation.

Electrical connections outside the passenger compartment must be “put on” in heat shrinkage (cambric, which shrinks when heated with an industrial hair dryer, can be done with a lighter).

Each car owner is trying to improve his car, changing its characteristics, increasing comfort. If there is a need to transport goods on a VAZ 2107, the dimensions of which do not fit into the luggage compartment, then in this case there is a way out - to install a towbar. Installation of the product is possible with your own hands, for which you need to prepare the necessary components and follow the step-by-step recommendations.

Hitch on a VAZ 2107 - what is it

Tow bar or hitch - additional equipment vehicle designed for hitching and towing a trailer. On the VAZ 2107, such a design is installed if there is not enough regular trunk. From the factory, the "seven" is provided with elements that allow, if necessary, only tow the car. As for the towbar, you can make it yourself or purchase a ready-made one and install it on a vehicle without the help of specialists from car services.

What are the towbars

Before you buy a hitch for a VAZ 2107, you need to find out what they are and what is their difference. Products are classified according to the type of hook and place of installation. For the car in question, hooks are:

simple design, when the hook is designed to carry loads up to 1.5 tons, fastening is performed on two bolted joints;
a quick-detachable hook on a coupling joint, which makes it possible to reduce the overall length of the vehicle;
face-type hook with a lifting capacity of 2-3 tons.

How the towbar is attached

The towbar can be attached in several ways:

into the holes provided by the manufacturer (there are none on the "seven");
into the technological holes of the body elements (side members, bumper mountings), into which the bolts fixing the trailer are inserted;
into the holes that are made specifically for mounting the towbar, with preliminary marking.

Homemade towbar or factory

Despite the fact that today it is not a problem to purchase a towbar for a VAZ 2107, some motorists still prefer to make such a structure on their own. This is due to the fact that factory products are not suitable for the owners by some criteria, and in terms of finance, homemade towbars are cheaper. Therefore, there are own ideas regarding the manufacture of trailed ones, especially since finding the necessary drawing today is not difficult. But before you start self-production coupling structure, you need to think well and weigh the pros and cons.

What can the installation of a homemade towbar threaten with? And there can be a lot of troubles:

Passing the technical inspection will be problematic, although this issue is being resolved: the trailed one can be removed for the duration of the procedure.
Structural breakdown due to improper manufacture or installation can be a significant problem. As a result, you can damage not only your car, but also become the culprits of an accident.

You need to understand that making a towbar with your own hands is a risk. If you purchase a certified product, you can be completely confident in the safety of this product.

Video: do-it-yourself hitch

Complete set of the factory hitch

Factory trailed is a design from manufacturers who have received a license for its manufacture, while firms are engaged in the manufacture of towbars for different brands of cars. One of the main advantages of a factory design is that the coupling part is tested. This speaks of the safety of the towbar, in contrast to homemade options.

The factory complete set of the towbar includes the following elements:

the metal part itself;
the installation instructions are usually in the form of a drawing;
fasteners;
socket and wires for connecting it.

What to consider before installing a towbar on a VAZ 2107

First of all, you need to take into account that a trailer for a VAZ 2107 from any manufacturer is a universal design. The unit is bolted to the rear bumper and body. Following the manufacturer's instructions, installation will not be difficult. However, before carrying out work, it is necessary to prepare the vehicle itself, or rather, its individual parts for installation.

In addition, you should take into account that with the installation of a trailer, the load on your "seven" will increase, and specifically on the bottom of the luggage compartment. To avoid unpleasant situations in the future, it is better to reinforce the boot floor, for example, with wide metal plates or washers during the installation process. Experienced auto mechanics are advised to treat the edges of the holes with mastic or primer after drilling. This will exclude damage to the metal by corrosion.

Installing a towbar on a VAZ 2107

To mount the towbar on the "seven", you will need the following tools and materials:

drill with a set of drills;
set of wrenches;
pliers;
primer;
insulating tape;
anti-corrosion mastic.

How to install a towbar

The process of mounting a hitch on a VAZ 2107 is carried out in the following sequence:

Remove the mat from the trunk.
Take a hitch and apply it to the bottom of the car for marking. An assistant holds the structure while a second person marks the installation site with chalk.
After marking, holes are drilled in the bottom and bumper of the car in accordance with the diameter of the bolts and the design of the trailer itself.
After drilling, the holes are treated with soil and covered with an anti-corrosion material.
Install and secure the hitch. The fasteners are tightened to the stop.
Connect the trailed socket.

Video: installation of a hitch on the "seven"

Towbar socket

The towbar, or rather its electrical part, is connected using a special socket. Through it, voltage is applied to the dimensions, turn signals and feet on the trailer. On the VAZ 2107, the electrical connector is connected to the standard wiring, which connects to the rear lights. The socket can have 7 or 13 contacts.

Where and how to install the socket

The socket is usually installed on a special bracket provided on the towbar from the factory. It remains only to secure the round connector and make the connection.

How to connect wires to an outlet

The towbar connector on the seventh model Zhiguli is connected in the following order:

The wiring that comes with the hitch is placed in a corrugated tube.
Dismantle the luggage compartment trim.
To lay the harness, make a hole in the floor of the trunk or use the bumper bracket.
Connect the wiring to the rear lights.
The harness is fixed with electrical tape or plastic ties.
All fastening areas and elements are treated with materials from corrosion, so that in the future it is possible to easily dismantle the device and prevent the spread of rust.

Video: connecting an outlet

The electrical connection of the towbar socket is made according to the diagram attached to the product. The wires from the socket are connected to the standard taillight connector in accordance with the color of the wires. To do this, remove the insulation from the standard wiring, twist the wire to the outlet, which eliminates the formation of unnecessary cables.

It is recommended to tin the ends of the conductors fixed in the socket, and cover the contacts of the block with contact grease to avoid oxidation.

The installation of a hitch makes the G7 a more versatile transport. By fixing the trailer, the car can be used as a small truck, which will allow you to transport various goods - from crops from the garden to building materials. The presence of the towbar also allows for better attachment of the tow rope when needed.

For many car owners, connecting the towbar is not difficult. However, this requires some knowledge of electrical engineering. First of all, this concerns the pinout of the trailer socket, then when you get acquainted with the connection diagram, you can guarantee that there are no problems.

Types of sockets and connection diagrams

Currently, several types of connectors are actively used to connect car trailers:

Semi-pin connectors of American and European types.
13 pin socket.
Special connectors.

The most popular among domestic motorists is the European seven-pin socket. Her main feature is the presence of female and male jacks on each of the connectors. The designers took this step deliberately to ensure the most secure connection in all situations. It is simply impossible to make a mistake when connecting the sockets in this case.

At the same time, the pinout of the towbar is not very difficult. Most often, the second contact is not used when connected and is optional for supplying a voltage of 12 volts. Sometimes car owners do not pay attention to the separation of the conductors in accordance with the side lights and simply combine them in the towbar socket connection diagram. However, this should not be done, as there will be problems with the normal operation of the light parking function used during a roadside stop.

Another feature of this type of connector is the presence of a reverse contact, as well as the lack of separation in accordance with the side lights. However, in some American cars, one conductor is used for this. Most often, the connection diagram of the socket of the trailer of a car is included in the delivery set, and all the wires are color-coded, which greatly simplifies the connection.

13 pin sockets are equipped with contacts for connecting additional devices, as well as positive and negative buses. This is their main difference. Do not forget - this connector is designed for a higher current, which allows it to be used, for example, for charging rechargeable batteries, as well as the supply of supply voltage for the equipment of the trailer-dacha. As for the special connectors, they can be used to connect modern models trailers equipped with their own electronic systems.

Connecting towbars of modern cars

In cars manufactured before 2000, was actively used analog circuit control of rear light devices. When connecting them, most often difficulties arose in correctly determining the place of inclusion of the desired conductor. Many car owners, when solving this problem, have sequentially connected contacts to a signal lamp.

However, after the active introduction of digital control schemes, such an approach began to pose a serious danger. This is due to the supply voltage and digital signals being supplied to the lighting devices. It is inappropriate in such a situation to use various twists when connecting the taillights. In theory, this is possible, but the car electronics can issue an error message and turn them off, because the current consumption indicator will be significantly exceeded.

To avoid these problems, it is recommended to use digital matching blocks. The manual should also contain a list of compatible vehicles. An inexpensive ham radio kit is also available. In addition to all the necessary parts, their kit includes a generalized trailer connection diagram. The pinout of the towbar socket in such a situation is determined by the car owner independently.

Algorithm of actions

The first step is to decide with a connection diagram, the need to use a matching unit, and also select a connector. If you do not plan to buy a trailer and only rented devices will be used, then you should immediately install a 13-pin connector.

Due to the availability of adapters on sale, it will subsequently be possible to easily connect a seven-pin connector to it. Although a reverse adapter can be found without any special problems, the 13-pin one is more convenient to use due to the presence of additional contacts. If a trailer is required to be connected to a car manufactured before 2000, then the need to use a matching unit may not arise. However, you will have to increase the fuse rating by a quarter.

The next step is to check the electrical circuits of the trailer.... If it is rented, then it is imperative to check its performance. The most common problems with the operation of the electrical equipment of trailers:

Short circuit in the areas of rubbing elements.
Failure of lamps.
Deterioration of the state of the electrical wiring in the connection zones ("decay").

Third stage involves the creation of a trace scheme. If the package of the purchased connector includes a set of conductors, then there is no point in replacing them. If they are absent, you should use wires of the same cross-section and color, which are indicated in the pinout. It is advisable to carry out all connections of conductors in the classic way: removal of insulation, twisting, soldering and subsequent heat shrinkage. The second option is to use clips. However, in such a situation, it is impossible to ensure the passage of large currents, and the connections themselves are not distinguished by high durability.

Immediately upon connection, you should be very careful and it is better to pre-compile a list of all connections. It should be remembered that all conductor connections must be insulated with heat-shrinkable cambric. To reduce the risks of contact with water, they should be pre-lubricated with grease.

The final stage of connection is verification. First of all, you should pay attention to the absence of short circuits by ringing all electrical connections. If there were no problems during the test, you can turn on the ignition and diagnose all functions. When the on-board computer reports an error, it is worth considering purchasing a matching unit.

Many motorists who are faced with the periodic transportation of certain goods use trailers for transportation. But in order for the car to be equipped with a trailer, first of all, a towbar should be installed on it. In this article, we will analyze what the trailer connection diagram looks like, and how to properly install the towbar.

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Towbar-mounted sockets

To correctly implement the wiring diagram for the passenger car you do not need to be a professional electrician. If you want to correctly connect the device to the car's electrical network, first of all, we recommend that you figure out the types of sockets that can be used. A special platform is connected to the towbar equipment, and the socket is already installed on it. It should be borne in mind that during installation, the outlet should be protected as much as possible from possible external influences that could damage it.

Today there are two types of outlets:

For 13 contacts. These sockets are usually used in cars in Europe and the United States. Additional contacts available in the socket are used to turn on fog lights and other electrical equipment. For example, if we are talking about a trailer house, then in addition to optics, you will need to bring out contacts to power all kinds of devices that are used in it.
With a pinout for 7 pins. 7-pin sockets are used in vehicles operating in countries the former USSR... In this case, contacts are used to connect side lights, turn signals and brake lights. In both the first and second cases, the contacts must be mirrored.

Photo gallery "Outlet diagrams"

Designation of terminals for connecting a trailer

In order for the car hitch to be correctly connected to the on-board network, you need to know which wiring to which pin to connect.

In accordance with the diagram, which is relevant for both types of sockets, the pin assignment is as follows:

Yellow contact. Used to connect left turn signal light and hazard warning lights.
To contact number 2 of blue color connect one of the rear fog lights if installed on a trailer.
To the exit white the mass is connected, that is, grounding. This contact should be connected to the vehicle body.
The green lead is used to connect the right turn signal light, as well as light signaling.
Element Brown color used for the left. It also powers the license plate light on the trailer.
The red output is for connecting brake lights. Under no circumstances should the trailer be used if this contact is not connected, as this may affect the safety of movement.
Black lead is used to connect right side lights... It should also be connected to the room backlight supply.
Pink contact. The purpose of this pin is to supply power to the reversing lights.
To the conclusion orange you need to connect the power from the car battery.
The next element is gray and is used to connect to the ignition switch. In this case, the work of the dimensions will be activated together with the inclusion of the dimensional optics.
Black and white element. This is grounding, therefore it is connected to the car body.
The output is blue and white. Usually this element is used as a spare, a signal wire can be connected to it.
The last pin is also the ground for pin 9.

It should be borne in mind that to designate the elements of the socket, other colors may be used that differ from those described above. However, only the most common ones that are used are listed here.

Hitch Connection Guide

So what is the correct way to connect the trailer to the car's electrical wiring? The installation and connection procedure should be carried out in the area of the harness connector, which is located in the area of the rear lights. Usually, cars have a special technological hole through which the light sources are replaced. It should be borne in mind that in the course of performing this task in modern cars, difficulties may arise, as practice shows, they are due to the incorrect operation of the optical indication. The very essence of the problem lies in the fact that the electrical circuit of the on-board network was originally designed for a specific parameter of current, as well as resistance.

Accordingly, performing an independent connection of additional voltage consumers, the parameter of the internal resistance of the electrical circuit will fall. As a result, this becomes the cause of increased current consumption, which contributes to an increase in power and activation of various protection systems. Such a system may "think" that there has been an interference in its work and, accordingly, will regard it as a closure. In order to prevent this, you can additionally use a special device - an adapter, which is characterized by increased resistance. With this adapter, the car owner can provide the most optimal power for the lights, while applying alternative options voltage sources.

Since you will have to additionally install a power source, this element should be connected to the car. If the adapter will not be used, then as an option, you can simply purchase a relay for side lights.

In general, the procedure is as follows:

First, the towbar is installed. Depending on the design features the car may have to dismantle the wheels and install a special frame.
Then the socket is brought out.
A hitch is connected to the towbar, all the corresponding wires are removed from it.
Then, in accordance with the pinout diagram, all electrical elements of the trailed equipment are connected to.

In this article, we'll talk about lighting sockets used on. There are two sockets on trucks. These sockets are called S and N type. Each lighting socket on a truck has its own purpose.

Lighting socket N type is used to transmit signals of dimensions, turns and stops from the tractor to the trailer. The S type light socket is used to transmit reversing signals and fog lights. Externally, the sockets may be no different from each other, or may differ in color: an S-type socket with a white cap, and an N-type socket with a black cap.

The main difference between the two types of sockets is the shape of the ground contacts. For an N-type lighting socket, all contacts of the same shape only have a ground contact larger diameter... The S-type socket has a hollow tube-shaped ground contact.

In addition to S and N type sockets, trucks are equipped with lighting, and. On our website you will find the common options for their connection, as well as information about those used on tractors.

Purpose and location of the S and N type lighting sockets

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