Car trailer socket pinout

Connection diagram of a car towbar to a trailer

Publication date: August 10, 2016.

The presence of a traction hitch (TCU) in a car allows you to transport cargo using a trailer.

However, it is not enough to simply purchase and install the most suitable tow bar for your car, you also need to connect it.

The fact is that for the safe operation of a trailer, signal lights must be working on it, allowing other road users to navigate your actions.

You can connect the towbar electrics yourself without extra costs or specialized tools. You just need to understand the type of wiring and purchase the appropriate adapter if needed.

European and domestic wiring

On the trailer hitch itself, under the protective cover, there is a special platform - a towbar socket. Its connection diagram depends on the number of contacts. Typically, domestic cars use 7-pin sockets, while 13-pin products are more typical for foreign cars from Europe and the USA (American cars are also produced with 7-pin sockets).

By and large, the pinout of the towbar connector differs only in the presence of additional pins for activating the electrical components, which are installed not in ordinary trailers, but in full-fledged trailer houses.

If we are talking about a standard device for transporting things, then the towbar connector is more suitable for it, the pinout of which will correspond to 7 elements.

Let's consider the European wiring option, where:

The towbar wiring is also connected according to the domestic scheme:

Left turn signal (yellow).
Fog light (blue).
"Earth".
Right turn signal (green).
Free.
Brake lights (brown).
Side lights (black).

If the pinout of the towbar does not match the trailer (let’s say you plan to operate a domestic trailer by connecting it to a foreign car, or vice versa), then you just need to purchase an adapter and make the connection according to the diagram described above.

It's time to move on to practical recommendations on how to connect the towbar socket to the car yourself.

Connecting the towbar socket to the car

Before connecting the towbar socket to the car, you need to make sure that its body, cover and plug are sealed. To do this, pour water over this part and see if there are any leaks. If the structure is not airtight, then the weak points will need to be treated with silicone after the final stage of installing the tow bar.

The outlet itself is connected in two ways:

Standard. In this case, no changes are expected to the vehicle's electrical system. If the trailer and trailer hitch have the appropriate connectors, then a circuit for such a connection is not required - you just need to insert the socket into the socket.
Universal. In the case when we are not talking about standard equipment, but about an additionally purchased towbar or trailer, a more complex connection is most often required.

If everything is clear with the standard version, then there are two options for connecting the tow bar to the car wiring using a universal method.

Option 1

This method is suitable for situations where the car does not have a modern control unit, which makes it possible to connect the wires directly to the electrical circuit. This means that the wiring coming from the connector is connected to the wires of the rear light elements.

To do this, you first need to refer to the trailer socket connection diagram, which can be found in the accompanying documents and instructions.

Next, the socket itself is connected in the area where the car’s rear light harness block is located.

Most often, in this place you can find a special technological window provided by manufacturers in order to simplify the procedure for replacing damaged light bulbs.

Healthy! In this case, you must have an extra wire for the second turn signal.

To connect the outlet this way, you can use crimp clips or simply strip the insulation from the wires, connect them and secure them by soldering. It is also worth considering that in order to connect everything correctly, it is better to arm yourself with a wiring diagram of the machine.

Option 2

If you are the owner of a modern foreign car, then most likely it has complex electronic components installed that will not allow you to connect the trailer using the first method.

The fact is that the installed control unit constantly monitors the optics located in the rear of the car.

As soon as more current consumption begins in this area, this will be perceived by the system as an error.

To avoid this problem, an additional element is used, which is called a matching block. This device is connected to the car’s standard electrical system, and it becomes a kind of intermediary, allowing the signal to be seamlessly transmitted to the light elements of the trailer.

Healthy! The control unit simply will not “see” the additional element, and accordingly the driver will not receive any error messages.

If you do not want to buy a matching unit, then you can use a little trick - use a relay. By and large, it will serve as a control element that supplies voltage to the side lights of the trailer. The relay can also be installed for brake lights and fog lights (if installed).

Once you have connected the trailer and checked that all systems are working properly and the lights are on, be sure to protect the internal components from moisture. Silicone is used for “gaps”, and to protect the contacts from oxidation it is recommended to treat them with graphite lubricant.

In custody

When connecting a towbar, it is important to follow the diagrams so that all elements work correctly. If you doubt your abilities, then it is better not to take risks and turn to specialists who will do everything according to all requirements for a small fee.

Source: https://avto-moto-shtuchki.ru/jelektronika/100-shema-podkljuchenija-pricepa-raspinovka-rozetki-farkopa.html

Trailer connector connection diagram (towbar socket pinout)

15.08.2013

The article shows the standard electrical pinout. Those. If you installed the towbar in a specialized service, you can safely buy a new trailer for your car. If you installed the towbar yourself, then we hope this article will be useful to you.

If you need a trailer wiring diagram and towbar socket pinout, you can use the information below.

Contact no.	Code	MZSA wire color	Wire color GOST 9200-76 page. 10 (11)	On some Ukrainian trailers	Signal	Wire size
1	L	Yellow	Yellow	Green	Left turn signal	1.5 mm2
2	54G	Blue	Blue	Red-white	Option, a fog lamp is being launched in Russia	1.5 mm2
3	31	White	White	Black	Earth (-)	2.5 mm2
4	R	Green	Green	Yellow	Right turn signal	1.5 mm2
5	58R	(No wire)	Brown	Rose red	Right side marker and license plate light (sometimes reverse)	1.5 mm2
6	54	Brown	Red	Blue-white	Brake lights	1.5 mm2
7	58L	Black	Black	Blue-black	Left clearance	1.5 mm2

Please note that on MZSA trailers nothing is displayed at the 5th signal. Accordingly, if the side lights on your MZSA trailer do not light up, most likely the signal in the towbar socket is output only to the 5th contact, and not to the 7th.

Some Russian trailer manufacturers, when installing a reversing light, connect it to the 5th terminal, and leave the 7th contact behind the dimensions.

For long and trouble-free service of the electrical outlet, we recommend that after connecting the contacts, coat them with lithol or grease, and securely treat the place where the wiring harness enters the outlet with sealant.

The connection diagram for a 13-pin trailer socket is discussed in a separate article.

Source: http://kupi-pricep.ru/blog/rozetka

Connection diagram for a car trailer socket: methods and their features

There is a widespread belief among motorists that connecting a tow bar is not that difficult, and any beginner can handle this job.

In principle, if we talk about connecting a trailer to a car, then there really won’t be any difficulties. However, if we talk about connecting the trailer's electrical system, this may puzzle many car owners.

And often, to complete the job, a towbar connection diagram is required.

Here we will not consider the advisability of having a towbar on a car, since in such cases this towbar is vital. Most often, they have a special platform where the towbar socket is located. And this outlet has a special cover that provides protection from negative factors.

Most often there are sockets that are equipped with 7 or 13 contacts. Cars that drive on Russian roads are usually equipped with 7-pin devices. As for sockets with 13 contacts, they are more common on cars used by residents of Europe and the USA.

These sockets differ from each other in terms of the use of additional contacts. With the help of the latter, you can use such additional devices as fog lights and other electrical components of caravans , which are often found in Western countries.

How to connect a towbar socket

When faced with an outlet connection problem, an owner can consider one of two methods:

standard;
universal.

The first method can only be considered if the towbar, like a car trailer, has the appropriate connectors that allow the connection to be made. Then the owner can do the work without even having a trailer wiring diagram in hand.

Indeed, in this case, all actions will be reduced to combining the socket with the socket . Often, information about the pinout of the towbar socket can be obtained from the vehicle’s operating instructions. This is exactly what should be done, since the owner will not have to change the electrical system of his car in any way.

However, what most often happens is that owners have to resort to a universal method. However, to get a more complete picture of the features, both of these options will be considered below.

First way

The design of the car does not include a modern electronic control unit. This allows you to connect electrical wires to existing electrical circuits without resorting to any splitters. In other words, all the work will come down to connecting the wires coming from the connectors to the rear lighting equipment.

Connection technology

The first thing you need to do here is to familiarize yourself with the socket connection diagram. Next, the socket needs to be connected to where the harness connectors of one of the rear lights of the car are located, using suitable connectors for this.

Upon careful examination, a technological window may be discovered there : manufacturers make it intentionally so that the owner does not have problems if replacing burnt out light bulbs. However, we should immediately prepare for the fact that there will be an extra wire left, since we will have to connect the second turn signal.

A similar problem can be solved as follows:

by connecting to volumetric clips;
You can first strip the wire of insulation, then connect it to the wire that comes from the outlet, and then secure the connection using soldering.

Second way

Owners of modern cars with rather complex electrical components should not use the first method of connecting a trailer. One of the functions of the control unit is to constantly check the condition of the rear optics . At the moment when it turns out that the current consumption rate has increased, a corresponding error signal will be sent.

In such a situation, specialists usually resort to the help of a device called a “matching unit”. It is also used when it is necessary to configure the transmission of control signals using a multiplex bus.

The first thing to do here is to connect the matching unit to the car’s standard electrical system. Next, the unit is switched on, from which the corresponding signals will be sent to the trailer’s lighting equipment. Now the car's control unit will no longer be able to recognize the device, which is why the owner can easily connect the towbar.
If, when examining the car, you find a connector that has a slightly different design than the one used on the trailer, then it is best not to try to solve this problem yourself, but to seek the help of specialists. Of course, you can always do everything yourself, but to do this you must have on hand a wiring diagram for the socket and pinouts. Quite often, owners who have certain skills are able to solve this problem without outside help. The same scheme is used to connect a cargo trailer.

Important nuances

The main thing you should remember is that connecting the trailer's electrical system is a mandatory procedure. Therefore, you should not underestimate the importance of this operation, thinking that other road users will be attentive while driving.

If you choose to neglect this, you may be subject to a fine . So whenever you get ready to hit the road, take a couple of minutes to make sure your trailer warning lights are working.

Conclusion

If you are the owner of a car that you use together with a trailer, then you should take care of connecting the electrics to it.

If you wish, you can do this work yourself; to do this, just find an outlet, after which, focusing on the connection diagram, you can quickly and inexpensively complete the job.

But if this is your first time doing this work, then you will definitely need an outlet connection diagram .

Particular attention should be paid to the fact that there are different methods for performing this operation, which you should be aware of even before you begin solving this task. Therefore, first of all, you should theoretically prepare for connecting the outlet so that you do not waste your time and energy.

Source: https://elektro.guru/elektrooborudovanie/dlya-avtomobilya/shema-podklyucheniya-rozetki-dlya-pricepa-legkovogo-avtomobilya.html

Trailer socket connection diagram: connector pinout

A car trailer significantly expands the capabilities of the car. It can be used to transport large loads, transport a snowmobile or a jet ski. And sometimes a boat.

In order to make using a trailer safe, you need to not only install the tow bar correctly, but also connect the electrics. Cars have several different trailer socket wiring arrangements.

Installing a tow bar

To install a towbar, you do not need to have special knowledge of car repair. Anyone who is used to changing wheels themselves can install a tow hitch.

Modern cars have standard places for installing a tow bar. Therefore, to install it, you need:

Place the machine on a viewing hole or lift.
Carefully inspect the side members. Under the layer of factory anti-corrosion mastic there should be strips of adhesive tape covering the fastening nuts. They are rigidly welded to the body.
Place the towbar under the trunk floor and align the eyes of the towbar with the nuts on the body.
Use the bolts supplied to secure the tow bar.

When buying, you don’t need to try to take the cheapest tow bar. It can cause a lot of inconvenience during installation. Original products are easily distinguished by the quality of workmanship and coloring. You should also try to attach the purchased towbar to the trailer. Its head may not fit the hitch.

How to connect electricity to a car trailer

Onboard electricity is supplied via a standard trailer socket connection. Domestic cars use seven-pin connectors. This variety is more common than others.

American and some European cars use thirteen-pin connectors. This is due to the ability to connect not only trailers, but also motorhomes. They require a lot of power from the electrical line. In addition, using this socket you can additionally connect: a rear video camera, parking sensors, and fog lights.

In Russia, connecting the towbar socket is different from abroad. Therefore, imported trailers have a different pinout and it will not be possible to connect them to a Russian outlet without modification.

Direct connection

The trailer socket connection diagram has 2 types. Depending on the number of contacts, they are connected in different ways. Here is a pinout diagram for a 7-pin socket.

No. Designation Connected element Wire cross-section Wire color 1 L Left turn signal 1.5 mm Yellow 2 54G Free 12 V wire for any option 1.5 mm Blue 3 31 Vehicle weight 2.5 mm White 4 R Right turn signal 1.5 mm Green 5 85R Right side lights and license plate light 1.5 mm Red 6 54 Brake lights 1.5 mm Brown 7 58L Left side lights 1.5 mm Black

The colors shown in the table correspond to the standard colors of the wires that supply electricity to the optical elements.

In this trailer wiring diagram, there is no reverse gear in the socket pinout. Because the vast majority of trailers for passenger cars are not equipped with appropriate warning lights.

Connecting a 13-pin socket

The pinout diagram for 13 pins is a little more complicated.

No. Designation What is connected Wire color 1 1L Left turn signal Yellow 2 2 Rear fog lights Blue 3 3/31 Ground for contacts 1 to 8 White 4 4R Right turn signal Green 5 5/58-R Left side lights and license plate light Brown 6 6/54 Brake light Red 7 7/58-L Right side lights Black 8 8 Reverse alarm Black-red 9 9 Constant voltage up to 35 A Brown-white 10 10 Voltage through the ignition switch Red 11 11 Main mass White 12 12 Reserve wire Red-blue 13 13 Ground for contact 9 White

If the on-board computer does not check the rear wiring, the connection diagram for the trailer socket remains standard.

Self-installation

You can install the electrical system of the tow bar yourself. This will take about 2 hours. The electrics have a simple diagram for connecting the trailer plug to the socket. The connector must provide an easy and reliable connection of electrical wiring.

In order to install a socket, you need:

Open the trunk of the car and remove the plastic or felt trim. It is better to dismantle the fastening clips with a spatula-shaped puller with a slot. In this case, the clips will remain intact and there will be no need to buy new ones.
Inspect the rear of the luggage compartment. Where the bumper is attached, there should be rubber plugs through which the wire passes that powers the license plate illumination. Through this rubber band, you need to insert a bundle of wires into the trunk to connect the towbar socket.
Inspect the tire going to the taillights. Divide the bundle into individual wires.
Strip no more than 1 cm of insulation on each wire. You need to connect the wires from the outlet to the exposed areas. The connection is best made using crimp locks for quick splicing of wires. It's better quality than twisting.
Secure the socket to its bracket using bolts.
Check that the connection is correct. To do this, you need to hook the trailer to the towbar and check the operation of the light alarm.

If the trailer's electrics work, you can install the trim.

How to find a fault

In damp weather, the socket contacts oxidize. Dirt also gets on it, which worsens the contact in the connector. For this reason, the trailer lighting stops working. How to identify the cause and eliminate the problem?

For a simple check of automotive electrical systems, there is an indicator, popularly called a “control”. It is a light bulb with two wires with clamps at the ends.

The trailer socket wiring diagram makes it clear which lighting fixture corresponds to which socket. You need to check with an indicator the connector responsible for the inoperative flashlight.

To do this, one clamp of the indicator is fixed on the iron part of the towbar, which will serve as ground, and the second is inserted into the connector being tested. Check with the electrics on. If the connection has poor contact, the indicator lamp will not light up.

To fix the problem, you need to disassemble the socket and clean the contacts with sandpaper.

Optical device matching

In some modern cars, light signals are controlled not directly, but through the on-board computer. It tests the front and rear optics for increased electricity consumption. Thus, the system protects the wiring from short circuits and from installing high-power lamps.

In these vehicles, it is not possible to directly connect a car trailer socket. The system will generate an error. To bypass it, install a block that matches the power of the rear light optics with the car’s computer.

The matching unit is built into the electrical circuit and connected to the wiring.

Installation materials

In order for the socket of a passenger trailer to work flawlessly, it is better not to skimp on material. To work you will need:

Stranded wire with a cross-section of at least 1.5 mm. The insulation must ensure operation under conditions of temperature changes.
Corrugation for laying wires in a single bundle. It will additionally create protection.
Socket. You need to make sure that the lid closes tightly without distortion. And the O-ring ensured tightness. The terminals inside should not be loose, otherwise this will lead to poor contact.
Connectors or crimp locks for splicing wires.

The socket operates in an aggressive environment, so you can additionally use silicone grease or grease to protect the contacts.

Source: https://www.nastroy.net/post/shema-podklyucheniya-rozetki-pritsepa-raspinovka-razyema

Connecting a towbar - diagram and pinout of the towbar socket

Many motorists believe that connecting a tow bar is a simple and quick procedure. In fact, connecting a trailer to a car is really easy. At the same time, connecting the trailer's electrical system can already raise a lot of questions. In such cases, you will need a towbar connection diagram.

We will not discuss the presence of the towbar itself on the car, since it is unrealistic to do without a towbar in such situations. As a rule, towbars have a special platform on which the towbar socket is located. In most cases, this same outlet is equipped with a protective cover.

The most common types of sockets have 7 and 13 contacts.

In our country, 7-pin devices are usually used, but 13-pin sockets can be seen on many cars used in Europe and the USA.

Essentially, the difference lies in the use of additional contacts necessary to activate fog lights and other electrical components of caravans that are popular abroad.

How to connect a towbar socket

The socket can be connected in only two ways:

standard;
universal.

The use of the standard method is only possible if the tow bar and trailer of the car (and truck) are equipped with the appropriate connectors.

In such cases, a trailer connection diagram is not needed at all, since you just need to insert the socket into the socket. Very often, the pinout of the towbar socket (provided that standard equipment is used) is included in the machine’s operating instructions.

This is an ideal option as it does not require any changes to the vehicle's electrical system.

But in most cases, motorists are forced to use a universal method. We will consider two scenarios.

Option one

The car is not equipped with a modern electronic control unit. Thanks to this, electrical wires can be directly connected to existing electrical circuits. That is, the wires that come from the connector are connected to those connected to the rear lighting equipment.

First you need to study the trailer socket wiring diagram. Then, using suitable connectors, we connect the socket at the location of the harness block of one of the car’s rear lights.

As a rule, you can find a technological window there, which manufacturers make to simplify the procedure for replacing burnt out light bulbs.

True, there will still be an extra wire, because you will have to connect a second turn signal.

To accomplish this task, you can find crimp clips or simply remove the insulation from the wire, connect it to the wire coming from the outlet, and secure the result by soldering.

A car electrical wiring diagram will definitely come in handy at this stage. By the way, we recommend watching the video, which will help you make sure your actions are correct.

The connection diagram for the towbar socket should be at your fingertips.

Option two

If we are talking about a modern car with complex electronic components, the first option for connecting a trailer will not be the best choice. The control unit tests the rear optics.

When it determines that it is drawing more current (as a result of the connection to the trailer optics), the driver will receive an error message. In such cases, specialists use the so-called “coordination block”.

It is also used in the case of transmitting control signals via a multiplex bus.

The matching unit is connected to the standard electrical system of the vehicle, after which the unit itself transmits the corresponding signals to the trailer’s lighting equipment. The car's control unit does not “see” this device, so problems with connecting the towbar no longer arise.

If your vehicle is equipped with a connector whose standard differs from that used on the trailer, we advise you to use the services of specialists.

If you want to save money, see the trailer socket connection diagrams and pinouts published in this article. If you have some skills, you can solve the problem yourself.

Connecting a cargo trailer is carried out in a similar way.

Do not forget that it is mandatory to connect the trailer's electrical system. You should not neglect this, counting on the attentiveness of other road users. This is one of the faults for which you may be fined. Before you hit the road, take one minute to check that your trailer's warning lights are working.

Source: http://avtopub.com/podklyuchenie-farkopa-shema-i-raspinovka-rozetki-farkopa/

Electrical wiring for a car trailer. How to connect the electrical wiring of a car trailer? Methods for connecting the electrical wiring of a car trailer. How to connect the electrical wiring of a car trailer with your own hands

Many car owners who periodically have to deal with the transportation of certain goods use trailers for transportation.

However, in order for the vehicle to be equipped with a trailer, a towbar must be installed on it. As for its installation, it is quite easy to do it yourself.

It is much more difficult to connect the electrical wiring of a trailer, which is required by the rules of the road.

Car trailer wiring diagram

To connect the trailer wiring to the vehicle, two types of 7-pin and 13-pin sockets are used.

The connection diagram for the socket of a towed vehicle (hereinafter referred to as BTS) also depends on the standard of the country, which is why a trailer with Russian wiring cannot be connected to a socket with European wiring without modification.

If you connect it without modification, the right side lights of the trailer will not light up, which can cause an accident at night.

13-pin sockets are usually used in cars in the USA and Europe. Additional contacts that are in the socket are used to turn on fog lights and other electrical equipment.

For example, if we talk about a trailer home, then in this case, in addition to optics, it will be necessary to output the contacts required to power the various devices used in it.

7-pin sockets are used in cars that are used in the countries of the former USSR. In this case, contacts are used to connect brake lights, turn signals and side lights. In both cases, the contacts should be mirrored.

Car trailer connection diagram

In order for the car trailer to be correctly connected to the on-board network, you need to know which wire to connect to which contact.

The trailer connection diagram for a Russian 7-pin socket is designed as follows:

Left turn signal.
Reverse light.
Earth.
Right turn signal.
—
Brake light bulb.
Dimensions.

And here is the European (universal) pinout:

Left turn signal.
Reverse light.
Earth.
Right turn signal.
Right side marker lamp and license plate illumination.
Brake light bulbs.
Left parking light.

They are actually the same, except for the fifth point.

Pinout for 13 terminals:

Left turn signal.
Rear fog light.
Ground for terminals 1-8.
Right turn signal.
Left side illumination of license plate and dimensions.
Stop signal.
Right side illumination of license plate and dimensions.
Reverse light.
The voltage is 12 V 35 Ampere, which is constant.
Voltage 12 V 35 Ampere, which is supplied after the ignition is turned on.
Earth.
Signal wiring.
Ground for the 9th terminal.

How to connect the electrical wiring of a car with your own hands?

In principle, when you buy a towbar for installation on your car, all the materials required for connection are sold with it. If not, this kit will need to be purchased separately. For this you will need:

Set of wires.
Towbar socket for connecting a trailer.
Fasteners.
Mounting plate.
Connection diagram for tow hitch with socket pinout.

In addition, you will have to take care of the tools that you will need for the job:

Soldering iron.
Insulating tape.
Heat shrink.
Connecting terminals for wires, if these are not included in the kit.
Drills and a drill, if the car does not have space for an socket and a tow bar.
Tools for removing the bumper or trimming it.
Screwdrivers.
Spanners.

If you do not have a special wiring kit, be sure to choose stranded wires with a cross-section of at least 1.5 mm2. In addition, copper wires are excellent for wiring. Before starting work, do not forget to remove the terminals from the battery so as not to expose yourself to risk and completely cut off the power to the network.

When connecting the towbar wiring yourself, you can resort to either the standard connection method or the universal one.

The first one is suitable for you if both the trailer and the towbar of your car already have special connectors that can be connected if necessary.

In this case, you essentially only have to carefully study the pinout of the BTS connector of the passenger car, which can most often be done using the vehicle’s operating instructions. You won't have to touch the power grid at all.

In all other cases, especially when you have to independently install both the socket and the towbar on the car, only a universal connection method will do. However, we will consider both methods.

standard method

To connect the towbar socket itself, you must first carefully study its connection diagram and the pinout of the trailer socket. Next, you need to locate the harness connector for one of the car's tail lights. It is to this harness that you will need to connect the socket; suitable connectors will be used for this.

Often, the design of the car provides a special window through which it is convenient to insert wires.

However, when connecting, you must have one wire left, which is necessary to connect the second turn signal.

If we talk about the method of connecting wires, for this you can either use bulk clips, or fix the connections by soldering (you will first need to remove a small piece of insulation from the wires).

The most important thing in such work is to strictly follow the connection diagram for the towbar socket. Otherwise, there is a risk of damage not only to the towbar, but also to the entire electrical wiring of the car.

universal method

If you have a modern car with an electronic control unit, it is not recommended to use the standard method. The bottom line is that the electronic unit completely controls the functioning of the rear lighting, and when you interfere with the integrity of the electrical wiring, there is a chance that the computer will generate an error and stop all lighting altogether.

Therefore, in addition to all the materials listed, you will also need to prepare a “coordination” block. It connects to the vehicle's electrical network.

The “matching” unit will supply the required signals to the rear lighting equipment, while the main electronic unit will not be able to recognize the additional device and therefore will not interfere with the connection and use of the towbar socket.

Then do the same as in the first method - connect the wires of the rear lighting of the car and the towbar sockets, while not forgetting the need for reliable insulation.

Pro Tips

In general, connecting the towbar wiring is not difficult if you understand the pinout of the towbar socket and the trailer connection diagram. It is also worth remembering that there are different types of sockets, and the socket of the trailer and the tow bar must match. Otherwise you will not be able to connect the trailer.

Source: http://prosedan.ru/elektroprovodka-pricepa-legkovogo-avtomobilya-kak-podklyuchit-elektroprovodku-pricepa-legkovogo-avtomobilya

Connection diagram for tow hitch 7 contacts

Sooner or later you may need to use your car to transport cargo. It may not be possible to do without a trailer. In this case, you will have to properly understand what the towbar socket is.

And it is a device, also called a towbar connecting chip, used to connect the electrics of a trailer or trailer with the electrics of a car, to supply power to signal lights and any other devices.

So, let's look at the subject that interests us, point by point.

Appearance of the towbar socket

How to connect the towbar socket?

As easy as pie. Pins - to connectors. Everything is according to the diagram, which, of course, is always in the instructions for the trailer or (if you are prone to losing important documents) – on the Internet.

It is desirable that the number of connectors matches the number of plugs. If not, there are special additional devices - adapters, in other words, adapters.

The wires to the tow bar can be routed either through the ventilation holes in the rear fenders, or into similar holes with rubber plugs in the bottom of the trunk, into the drain holes.

You can run the wiring under the trim, in the place where the trunk closes. Another option is to carefully drill a suitable hole in the bottom of the trunk yourself.

Connection diagram for towbar socket

Also called pinout and desoldering. Explains the purpose of each contact and wiring, answers the questions: what? , Where? and for what? . More detailed drawings are presented in the pictures.

When connecting the towbar socket, this diagram will help you

Let's look at the circuit using the example of a thirteen-pin chip:

Left turn, yellow wire.
Fog lights, blue wire.
Minus for circuits 2, 4-8, 1 (35A), white.
Right turn, green.
Right side marker, wire color – brown.
Stop, red wire.
Left marker, black wire.
Reverse, white wire, large diameter.
Constantly on lamp, blue wire of large diameter.
Either ignition or battery charging.
Either reserve or minus for circuit 10 (35A).
Spare.
Minus, circuit 9 (35A).

7-pin towbar socket

It is standard for cars of European and Russian production. It features a ball on the towing device with a diameter of 50 millimeters. And, of course, the number of contacts is 7 pieces, hence the name of the chip.

Diagram of a European towbar socket

The wiring for the European tow bar is as follows:

Left turn signal, wire 1.5 mm
12V, (+) option, wire 1.5.
Minus, 2.5 wire.
Right turn, 1.5 mm wire.
Right dimension, 1.5 mm.
Brake light, wire 1.5 mm.
Left dimension, 1.5 mm.

Towbar socket

Used to secure the towbar socket to a trailer or vehicle. There are two types of socket boxes. The first is for towbars with type A ball. The second is for balls of types GC, G, FC, and also F.

Prices for sockets for towbars

7-pin sockets and towbar plugs can be purchased from 4 USD. 13-pin, from 15 USD Adapters (adapters) from 13 contacts to 7 and vice versa – from 20 USD

Well, now you know everything you need about towbar sockets. Are you planning to take your family out for an overnight stay, but don’t know if everything you need will fit in your car? It's just a matter of small things - choose the equipment that suits your car, buy, install and off you go.

7-pin towbar connection diagram

Connection diagram for towbar 7 contacts UAZ Patriot

Towbar connection diagram 7 pins photo

KIA Sportage Dude › Logbook › Connecting the towbar socket

Sometimes we desperately need a trailer to transport some oversized, heavy or dirty cargo. And then, after the mechanical connection with the car, you need to connect their electrical circuits, which will allow you to correctly inform other drivers about your intentions. The most widespread are 7-pin connectors.

There are several standards for wiring them. In my case, I installed a European type on the left socket, a full non-standard on the right socket :), and there I take the reverse gear.

If there is a need to have different wiring (for different trailers or the number of contacts is higher than 7, for example when connecting caravan trailers), then you can use 2 standard sockets; they are much easier to find than 13-pin ones.

contacts (diagram)

European wiring

No.___Code___Circuit________________________________Wire

1___L ___left turn _________________________1.5 mm2

2 ___54G__ rear fog lamp __________1.5 mm2

3___31 ___ weight (-) ________________________________2.5 mm2

4___R___right turn__________________________1.5 mm2

There is also a Russian scheme

No.___Circuit ____________________Wire color

1___left turn ______________yellow

2___fog lamp_____blue

3___mass (-) ___________________white

4___right turn ____________ green

6___stop - signal_______________brown

7___side lights _____________black

Theoretically, the main functions will be performed with any tractor-trailer combination (the only difference is pin 5), but some inconsistencies are possible, for example:

1) tractor with ros. wiring, European trailer. — the right-hand lights on the trailer do not light up.

Connections on relatively simple cars are usually made by tapping into the factory wiring to the rear lights,

in some cars with a K-bus or diode lights, it is necessary to stretch the power wire and install a block with a relay, taking control signals from the same rear lights.

When wiring to an outlet, I recommend using double-insulated stranded copper wire with a cross-section of each core of at least 1.5 mm2.

sockets

Almost all sockets sold on the market are attached as standard to the met.

bracket on the tow bar itself using three screws with 5 nuts, so in case of breakdown, the socket can be easily replaced with another one, there is no need to redo the fasteners.

When choosing a socket, you should pay attention to the presence of a rubber seal on the back side to waterproof the contacts. For the same purpose, pay attention to the tight fit of the cover on the front side in front of the contacts.

After the wiring in the outlet is connected and checked, I recommend protecting the inside from moisture and oxidation of the contacts by lubricating the inside with graphite.

Connecting a towbar - diagram and pinout of the towbar socket

The most common types of sockets have 7 and 13 contacts.

In our country, 7-pin devices are usually used, but 13-pin sockets can be seen on many cars used in Europe and the USA.

Essentially, the difference lies in the use of additional contacts necessary to activate fog lights and other electrical components of caravans that are popular abroad.

How to connect a towbar socket

The socket can be connected in only two ways:

standard
universal.

The use of the standard method is only possible if the tow bar and trailer of the car (and truck) are equipped with the appropriate connectors.

This is an ideal option as it does not require any changes to the vehicle's electrical system.

But in most cases, motorists are forced to use a universal method. We will consider two scenarios.

Option one

First you need to study the trailer socket wiring diagram. Then, using suitable connectors, we connect the socket at the location of the harness block of one of the car’s rear lights.

As a rule, you can find a technological window there, which manufacturers make to simplify the procedure for replacing burnt out light bulbs.

True, there will still be an extra wire, because you will have to connect a second turn signal.

To accomplish this task, you can find crimp clips or simply remove the insulation from the wire, connect it to the wire coming from the outlet, and secure the result by soldering.

A car electrical wiring diagram will definitely come in handy at this stage. By the way, we recommend watching the video, which will help you make sure your actions are correct.

The connection diagram for the towbar socket should be at your fingertips.

Option two

If we are talking about a modern car with complex electronic components, the first option for connecting a trailer will not be the best choice. The control unit tests the rear optics.

It is also used in the case of transmitting control signals via a multiplex bus.

The matching unit is connected to the standard electrical system of the vehicle, after which the unit itself transmits the corresponding signals to the trailer’s lighting equipment. The car's control unit does not “see” this device, so problems with connecting the towbar no longer arise.

If your vehicle is equipped with a connector whose standard differs from that used on the trailer, we advise you to use the services of specialists.

If you want to save money, see the trailer socket connection diagrams and pinouts published in this article. If you have some skills, you can solve the problem yourself.

Connecting a cargo trailer is carried out in a similar way.

Source: http://www.avtopiligrim.ru/pljusy-i-minusy/shema-podkljuchenija-pricepnogo-ustrojstva-7.html