Fuses and relays of Lada Priora: who is responsible for what

How does a car fuse work?

One of the simplest structural elements of a car is a fuse, which consists of two main parts - a plastic body and a fuse-link with contacts. However, despite the simplicity of the design, such details play a very important role. After all, they not only eliminate the possibility of electrical equipment failure, but also prevent the possibility of a fire. It is thanks to fuses that when a short circuit occurs in the electrical circuit or under increased load, the insulation on the wires does not melt, but the fuse-link burns out.

Priora uses flag or plug-type devices. Inside the case there is a plastic insert that has a certain current rating. The fuse housing has a transparent appearance, which is done specifically to visually determine the suitability of the product. Legs protrude from the body - they are also contacts that close the electrical circuit.

The main parameter of fuses is the current strength. The corresponding value for which the element, or more precisely, the fuse link, is designed is indicated on the body. If there is no designation, then you should focus on the color of the case. The case is painted in different colors for a reason, but in order to determine whether a particular fuse belongs to the corresponding current rating. Below is a photo showing the colors and their corresponding current ratings.

Use this information if you find it difficult to determine the fuse rating yourself. Having understood the device and color rating, you should consider the principle of operation of the devices.

In the circuits of various electrical equipment, fuses are installed that have a certain current rating. Electrical appliances consume different currents, and to eliminate the possibility of false operation, devices with the appropriate current rating are used. When a large current begins to flow in the circuit, the wires heat up, but the first thing that heats up is the fuse-link, which is eventually interrupted, thereby breaking the circuit.

The absence of a fuse would in such a situation lead to melting of the insulation, and as a result, shorting of the positive contacts to ground. The result of such consequences is disastrous for the vehicle, as can be seen by looking at the photo below.

Such consequences arise when fuses are installed of the wrong rating or drivers completely neglect the need to use such devices, and in the event of a melted fuse insert, they solve this problem by short-circuiting the circuit with jumpers. This cannot be done, since the result of such rash actions leads in 100% of cases to dire consequences.

Fuses cannot be repaired. There is no need to try to solder the fuse links, thereby restoring the functionality of the products. If the device fails (more precisely, it worked), then it is not suitable for use and must be replaced. Moreover, it is important to install fuses of a similar current rating in the circuit, since neglecting this rule will lead to the following consequences:

if the fuse is installed with a lower rating than necessary, it will trip more often even for no apparent reason;
If the product is installed with a higher rating than necessary, then with an increased load in the circuit, the fuse-link will not operate in a timely manner, and the insulation will melt. Every driver understands the outcome and consequences of insulation melting.

Having understood the design of fuses, their operating principle and differences in rating, we move on to considering the devices on the Lada Priora car. Let's consider all possible configuration options for the Priora, indicating all the fuses and relays.

Connected devices to the Priora cigarette lighter

You can independently calculate exactly what power devices can be connected to the car cigarette lighter. For this purpose, you will certainly need to know the current rating, which is what the fuse is designed for. How to do this yourself? Everything is quite simple: we multiply the current strength of 15A (ampere) by the so-called rated voltage in the cigarette lighter itself, which is 12V (volts).

It follows from this that any existing device connected to the Lada Priora cigarette lighter cannot exceed a power of 180 W (watt). At the same time, the list of devices allowed for connection is quite extensive, we suggest you familiarize yourself with it:

DVR;
Compressor/portable refrigerator;
Ionizer;
Devices for navigation;
Massage pillow/special cape;
Air purifier;
Lantern/lamp;
Boiler/electric kettle;
Splitter;
Fan;
Special heating pad on the seat;
Vacuum cleaner

Let us additionally note that every year various new devices and all kinds of instruments appear. Always be careful about what you connect to the car cigarette lighter, because excessive load can not only cause fuses to fail, but also a short circuit, and worst of all, a fire.

Where are the fuse and relay blocks located on the Priora?

Before you start checking the fuses, you need to understand their location. On a Priora car, blocks with fuses and relays are located in several places, and therefore we will consider where to look for them.

Engine compartment - there are two blocks here. The first (main) fuse block (without relay) is responsible for the health of the power circuits of devices such as the ECU, cooling fan, generator, EMUR or EUR and others. The photo below shows what this block looks like. It is located under the hood next to the battery.

To find it under the hood, you need to look in the area of the left “glass”. Its location is shown in the photo below.
The engine compartment is a fuse and relay box responsible for protecting the air conditioning system. Naturally, such units are available on Priors, which have an air conditioning system. This block is located near the left “glass” and consists of fuses and control relays. It is important to note that the units differ depending on the type of air conditioning system used on the vehicle. Prioras are equipped with air conditioners of two brands, Halla and Panasonic, and depending on the type, the units differ in the internal arrangement of the elements. The photo below shows where the fuse box and relay for the air conditioning system are located on a Priora.
The car interior - there are also two fuse and relay blocks installed here. The first is located directly under the dashboard on the driver's side. This block contains fuses that are responsible for the electrical equipment on the car, namely, light, sound signal, cigarette lighter, immobilizer, double-glazed windows, etc. The photo below shows where this block is located.
Inside the car under the center console on the passenger side. Few people know about this fuse and relay block. This block contains fuses that are responsible for the health of the fuel pump, ECU and starter circuits. The relays on this block are responsible for switching the ignition switch and fuel pump circuits. Below is a photo of where this block is located on Priora.

Knowing the places where the fuses and relays are located on the Priora, you can begin to consider the purpose of each element.

This is interesting! Depending on the configuration of the Priora, the fuse and relay blocks, which are located under the dashboard on the driver's side, differ.

What fuses determine the operation of the cigarette lighter in Priora

First question: where is it located? When considering a specific car, and in our case it is the Lada Priora, you can safely look for the cigarette lighter fuse we need and will certainly find it in the specialized mounting block, which is where it is installed. When the car owner is sitting in the car, all he needs at this moment is to look down to his left.

The so-called mounting block is located at the bottom of the dashboard, to the left of the steering wheel and is covered with a special protective cover. Just under this cover you will find the entire Priora mounting block with fuses. At the bottom of the block there are 2 rows with all kinds of fuses. The cigarette lighter fuse “settled” in the top row, and its place is on the far right. Factory marking of fuse socket F13. Also an important question: what fuse does it come with? In this case, the current should be 15 amperes.

In all Lada Priora models from the Russian Federation, without exception, the cigarette lighter fuse we are currently considering is also present in the main unit. This element is primarily responsible for the fan located in the cooling system, but also ensures the operation of the cigarette lighter. In the main unit under the hood, its factory marking is F3, and the current limit is 60 amperes, respectively.

It has been verified experimentally that on the Priora, which is popular in the Russian Federation, the safety element we need has to be replaced quite often. The main reason for this problem is that the cigarette lighter is often used incorrectly. Most car owners do not think about the fact that the cigarette lighter is necessarily limited in power and current. You cannot connect a fairly powerful device to the connector; it is also undesirable to use a device that distributes charge to several devices or gadgets. You need to purchase reliable fuses, and high-quality wires for your car will also help keep the overall wiring of the car in proper condition.

Main fuse box on Priora under the hood: purpose of elements

First, let's examine the fuse box, which is located under the hood of the Priora. The unit is equipped with high-rated fuses, which indicates protection of the power circuits of powerful electrical equipment.

This is interesting! For easier searching, use the Ctrl+F key combination on your computer.

Below is a photo of the block with the corresponding name of the fuses.

The first 30A green F1 is responsible for protecting the power circuit of the electronic computer system, the fuel pump and the ignition relay.
The second F2 60A blue color is designed to protect the power circuit of the electric fan of the cooling system, as well as the ignition relay, heated rear window and the double-glazed window controller.
The third 60A blue F3 is responsible for protecting the cooling fan power supply control circuit, as well as the horn, hazard warning lights, ignition switch, instrument cluster, interior lighting, STOP signal and cigarette lighter.
The fourth F4 60A blue is designed to protect the generator circuit.
The fifth F5 50A red color is designed to protect the power circuit of the electromechanical power steering EMUR.
The sixth F6 60A blue is designed to protect the generator circuit.

To check the suitability of these fuses, they do not have to be removed from the block. To do this, there are open contacts on the front part through which you can ring the elements and make sure that the fuse link is in good condition.

Fuse box in the interior of a Priora car: basic configuration (standard) without air conditioning

Now let's look at the main fuse and relay block for electrical equipment, which is located inside the car under the dashboard on the driver's side. The photo below shows where the block is located.

To gain access to it, you need to unscrew the three thumbs and remove the plastic decorative trim.

After this we will see the corresponding fuse and relay block of the Priora. Its appearance will vary depending on the type. They come in two versions:

type 1118-3722010-00;
DELRHI 15493150.

The difference between them is insignificant, as you can see by looking at the photo above.

Next, we will consider the location and purpose of each fuse in the standard configuration of a Priora car. Below is an example on a mounting block type 1118-3722010-00.

And accordingly the designation of these fuses.

F1 - 25A - Electric radiator fan of the engine cooling system.
F2 - 25A - Heated rear window.
F3 - 10A - High beam lamp (right side).
F4 - 10A - High beam lamp (left side).
F5 - 10A - Sound signal.
F6 - 7.5A - Low beam lamp (left side).
F7 - 7.5A - Low beam lamp (right side).
F8 - 10A - Signal.
F9 - 25A - Heater fan.
F10 - 7.5A - Instrument cluster contact “30”. Interior lighting and STOP signal lamps.
F11 - 20A - Windshield wiper (wipers) and heated rear window (control).
F12 - 10A - Output “15” on the instrument panel.
F13 - 15A - Cigarette lighter.
F14 -5A - Side lights (left side).
F15 - 5A - Side lights (right side).
F16 -10A - Output “15” to the ABS system.
F17 - 10A - Fog lamp (left side).
F18 - 10A - Fog lamp (right side).
F19 - 15A - Heated seats.
F20 - 5A - Control unit.
F21 - 7.5A - Rear fog light.
F22-F30 - Reserve.
F31 - 30A - Electrical window control unit.
F32 - Reserved

Below is a photo from the manual.

Now let's define the relay designations. The photo below shows their numbering.

The relays on the Priora in the standard configuration without air conditioning have the following purposes:

Having familiarized ourselves with the basic configuration (standard) of the Priora, we move on to studying the VAZ-2170 car in the Luxury configuration.

Step-by-step replacement of the cigarette lighter fuse on Priora in the mounting block

First of all, we have a preparatory moment. To do this, you need to turn off the ignition completely and disconnect the battery. How to proceed? Remove the negative terminal.
You already know where the mounting block is. It is secured with 3 bolts, they can be easily unscrewed.
After removing the bolts, the cover must be hooked from below and carefully removed.
As mentioned earlier, the safety element responsible for the operation of the cigarette lighter is located in the top row, and at the same time on the far right. Even if you have determined its location, to be completely sure you need to check the block cover. Marking of element F13.
There are special tweezers located in the block body (marked 1 and 2, respectively). Gently squeezing the fuse with tweezers, remove it. You are more likely to see a broken thread or that the device has melted. In some cases, a failed element has no visual damage at all.
Install the new element into the seat. Check the fuse rating, it should be 15A.
Replace the unit cover and secure it.
Connect the negative terminal of the battery.

Step-by-step replacement of the cigarette lighter fuse on Priora in the engine compartment

We carry out preparatory work, during which it is necessary to turn off the ignition of the LADA Priora and remove the negative terminal of the battery.
There is a main car fuse box near the battery. You need to open it and find the element marked F3. Be sure to always refer to the diagram.
At the next stage, we remove the fuse in exactly the same way as was described in the instructions for replacing the fuse element in the mounting block located in the car interior.
We install a working new fuse. We remember that its rated current is already 60A.
We connect the battery.

Fuse and relay block on Priora Lux and Lux Plus: designations and assignments

The fuse and relay block on the Priora in the Lux and Lux Plus configurations looks like this, as shown in the photo below.

The photo below shows how to correctly count fuses.

The fuses are indicated above, how to correctly read them on the block. They have the following designations:

F1 - Reserve socket.
F2 - 25A - Heated rear window, electrical package module, relay and connector “10” of block XP2 for connecting the rear window heater.
F3 -10A - Right headlight, high beam lamp, instrument cluster, signal lamp for turning on the high beam headlights.
F4 - 10A - Left headlight high beam lamp.
F5 - 10A - Mounting block (protection), horn relay and horn.
F6 - 7.5A - Left headlight low beam lamp.
F7 - 7.5A - Low beam lamp of the right headlight.
F8 - 10A - Mounting block, anti-theft alarm relay and anti-theft alarm sound signal.
F9 - Reserve socket.
F10 - 10A - Instrument cluster, contact “20”. STOP signal switch and STOP signal lamp. Interior lighting unit and interior lighting. The door sill light on the right front door. Auxiliary STOP signal.
F11 - 20A - Mounting block, high-speed windshield wiper relay. Switch for cleaners and washers, contact “53a”. Wiper and washer switch, contact “53ah”. Heated rear window switch. Mounting block, rear window heating relay (winding). Windshield wiper motor. Rear window wiper motor (for 2171, 2172). Windshield washer motor. Rear window washer motor (for 2171, 2172). Airbag control unit, pin "25".
F12 - 10A - Instrument cluster, contact “21”. Electrical package controller, contact “9” of block X2. EMUR control unit (EUR), contact “1” of block X2. Reversing lamp switch. Parking system control unit, contacts “11” and “14”.
F13 - 15A - Cigarette lighter.
F14 - 5A - Dimensions lamps (left side). Instrument cluster, light on indicator. License plate lights and trunk light. Electrical package controller, contact “12” of block X2.
F15 - 5A - Dimensions lamps (right side). Lamp for lighting the glove compartment.
F16 - 10A - Hydraulic unit of the ABS system, contact “18”.
F17 - 10A - Left side fog lamp.
F18 - 10A - Fog lamp right side.
F19 - 15A - Seat heating switch, contact "1". Front seat heater.
F20 - 10A - Recirculation switch (on indicator). Mounting block, relay for low beam headlights and parking lights (automatic lighting control system). Heater electric fan relay. Automatic lighting control switch. Windshield wiper and external lighting control unit, contacts “3” and “11”. Climate system control controller, contact "1". Automatic window cleaning system sensor (rain sensor), contact “1”.
F21 - 5A - Light signaling switch, contact "30". Diagnostic block, contact “16”. Clock and climate control controller, pin “14”.
F22 - 20A - Windshield wiper motor (automatic mode). Mounting block, windshield wiper relay and high speed windshield wiper relay.
F23 - 7.5A - Control unit for windshield wipers and external lighting, contact “20”.
F24-F30 - Reserve socket.
F31 - 30A - Electrical package controller, terminal “2” of block X1. Electrical package controller, terminal “3” of block X1. Double-glazed window control module on the driver's door, pin “6”. Lamp light for the threshold of the left front door.
F32(F28) - 40A - Reserve on Priora without ABS. On a Priora with ABS: ABS system unit.

And a similar table in the form of a photo, which can be printed on a printer if necessary.

Below is a pinout diagram for the central unit of the body electronics.

Now about the actual purpose of the relay on the mounting block. Below is a photo with the relay designation.

All these relays have the following purposes:

Below is a wiring diagram of the mounting block for Priora Lux Plus.

This is interesting! When replacing fuses, buy products not only of the appropriate rating, but also from reliable manufacturers. It is not recommended to buy Chinese-made products that are not tested. For Priora, it is recommended to choose fuses of the LittelFuse brand.

Relays and fuses for Panasonic and Halla air conditioners on Priora: purpose of elements

If the Priora has an air conditioning system installed, then the mounting block, consisting of fuses and relays, is responsible for switching and protecting the circuit. This block is located in the engine compartment. It was already mentioned above that depending on the air conditioner model, the arrangement of the elements differs. In order not to get confused, we will consider separately the purpose of fuses and relays for both types of Priora air conditioning systems.

The Panasonic air conditioning system mounting block looks like this, as shown in the photo below.

They are responsible for protecting and switching the following circuits:

K1 - turning on the air conditioner radiator cooling fan at maximum speed.
K2 - right cooling fan.
K3 - sequential activation of fans at low speed.
K4 - right cooling fan.
K5 - heater fan.
K6 - compressor.
F1 (30A) - left fan at low speed.
F2 (30A) - right fan.
F3 (40A) - heater fan.
F4 (15A) - compressor.

If the fans malfunction, first check the fuses and relays in the mounting block of the air conditioning system.

The installation block of the Halla air conditioning system on the Priora has minor differences. The photo below shows what it looks like with the elements labeled.

They have the following purpose:

F1 (30A) - fuse for the right fan power supply circuit.
F2 (30A) - left fan power supply fuse.
F3 (40A) - heater fan power fuse.
F4 (15A) - compressor power fuse.
K1 - right fan relay.
K2 - additional relay for turning on the right and left fans.
K3 - left fan relay.
K4 - heater fan relay.
K5 - compressor relay.

Knowing the location of the corresponding fuses and relays, it will not be difficult to check the electrical circuit and detect malfunctions.

How the cigarette lighter fuse works in Priora

The fuses we consider are always made in the form of small fusible elements. Their task is to open the electrical circuit in case of a short circuit or when the power is exceeded. Their task is to protect all car systems.

The cigarette lighter fuse, like other fuses, is made of a plastic casing, plus there is a special plate or high-tech thread that conducts electric current. The product has a housing, which is also a fastening system, mounted to the contacts of the mounting block, which in turn is connected directly to the electrical circuit of the entire car, in our case Lada Priora. Fuses are always hidden under a protective housing.