Where is the fuse on the Lada Priora? How to change?

The electronic functionality of the VAZ-2170 Priora and its modifications is significantly higher than that of the tenth Lada model that preceded them, although it cannot be called revolutionary, or even modern. In this sense, the Priora is distinguished from the VAZ 2110 by the presence of a variety of devices designed to provide a certain level of comfort and safety.

These include air conditioning, heated and controlled side mirrors, front airbags, a primitive ABS system, and if we compare the old “ten” modifications, then also electric power steering. Each of these electrical circuits is controlled by a relay and protected by appropriate fuses. All of them are distributed and located in separate blocks.

Relay and fuse blocks

The VAZ-2170 has three relay and fuse blocks:

• main block;
• mounting block;
• additional mounting block.

Luxury "Priors" with air conditioning have another additional block in which relays and fuses are located that are responsible for the operation of climate control equipment.

Main power fuse block

The main unit is located in the engine compartment of the car next to the battery and expansion tank. It is protected from above by a removable plastic casing. The main unit contains only six fuses that are responsible for the operation of the main (power) electrical circuits of the car.

To replace the fuses in the main unit, you need to disconnect the ground on the battery, remove the cover and replace the faulty part. VAZ-2170 mounting block

Relays and fuses in the cabin

The mounting block is located in the car interior under the dashboard on its left side. It is protected by a removable plastic panel attached to the “torpedo” using three latches. To remove the panel you need to turn each of these latches 900 degrees. After this, the panel will be completely removed.

The location, number, and markings of relays and fuses in the Priora mounting blocks may differ depending on the type of vehicle equipment.

Mounting block fuses

To remove the mounting block from its seat, you only need a screwdriver with a Phillips bit. She needs to unscrew the screw securing the block, then, pulling it towards you, disengage it from the fastening hooks.

Before replacing relays and fuses, you must disconnect the negative terminal from the battery. To remove the main unit, you will need to disconnect all terminals with wires connected to it, having previously marked their location.

Additional mounting block

The additional VAZ-2170 mounting block is located behind the panel of the right tunnel trim on the left leg side of the front passenger. To get to it, you need to unscrew the screws securing the cladding and remove it.

The additional mounting block contains three fuses and two relays.

To replace fuses and relays in the additional unit, there is no need to remove it from its mounting location. To remove the relay, you should unscrew the corresponding nut securing it with an “8” wrench. Before carrying out work to replace the relay, fuses or the entire unit, it is strongly recommended to disconnect the ground wire from the battery, and also disconnect the wiring harness block of the electronic engine controller from the additional connector mounting block.

Fuse power

All fuses are color coded depending on the power for which their fuse links are designed:

• The fuses for the cooling system fan (F1), heated rear window (F2), and the interior heater motor (F9) are designed for a current of 25 A;
• fusible elements of the high beam headlight fuses (F3, F4), sound signal (F5), hazard lights (F8), 15th terminal of ABS (F16), fog lights (F17, F18) protect circuits designed for a rated current of up to 10 A ;
• 7.5 A fuses protect the circuits of low beam lamps (F6, F7), instrument panel, interior lighting, brake lamps (all F10) and rear fog lamp (F21);
• side lights (F14, F15), immobilizer (F20) – 5 A fuses;
• wiper motor (F11) – 20 A fuse element;
• heated seats (F19) – protected by a 15 A fuse;
• the most powerful fuse is 30 A - protection of electrical circuits (F31 or F27).

Replacing fuses of a higher rating with a smaller one, as well as the reverse replacement, is not allowed. If a fuse protecting the light signal or active safety circuits of the vehicle blows, it is allowed to replace it with a similar one removed from the socket of the circuit responsible for comfort or others that do not affect the safety of the vehicle when it is moving. If possible, the protection of electronic circuits must be restored in accordance with the requirements of the vehicle manufacturer.

The mounting box installed in the interior of the Lada Priora contains not only fuses, but also electromagnetic relays, the switching circuit of which provides for connecting a high-power load. By using such relays, the manufacturer has achieved a reduction in the current load on the switch contacts. This prevents burning of the contact pairs installed in them. Therefore, if a certain circuit malfunctions, it is necessary to check not only the integrity of the fuse, but also the serviceability of the relay installed in the Priora fuse box and responsible for the device switching circuit.

Operating principle of the fuse

When using a fuse in an electrical circuit, the operating current passing through the fuse does not exceed its rated current - this is its normal operation. But as soon as a current appears in the electrical circuit that exceeds the safe permissible values ​​​​in this circuit, regulated by the fuse, the fuse-link, under the influence of a current exceeding the rated current of the insert, begins to melt and collapse as a result of which the electrical circuit breaks.

You can restore the electrical circuit by replacing the fuse, but only after the culprit for the increased current in this electrical circuit has been found. Otherwise, the new fuse will also blow.

How to choose

Having decided to replace a relay or fuse in a Priora, take full responsibility for their selection and purchase. Under no circumstances should you buy cheap parts of unknown quality and origin.

It is better to give preference to original products produced by VAZ. As a last resort, buy relays or fuses from one of the well-known companies, such as Bosh, Hella or Tesla.

The peculiarity of Lada Priora cars is that they do not have 1 assembly fuse block. The fuse is considered one of the easiest machine elements to install and operate; replacing it is not difficult. Its task is to protect the electrical wiring of the vehicle as much as possible. If electrical parts or systems fail, the mechanic or owner first of all pays attention to the condition of the fuses and whether there are any burnt-out wiring. The Priora fuse circuit is arranged in blocks and localized in different places of the car. This is justified by significant savings in electrical wiring. For example, if there is a short circuit in one place, the rest of the machine will not be affected.

The main mounting block is located next to the heart of the car - the battery, and is located under the hood. Absolutely all parts of this design are marked with the Latin letter “F”, which determines the relatively low power of the equipment.

Peculiarities

The body of the product is made of fusible material – plastic; inside there is a specific thread that conducts electric current. What is the hull? This is a system for fastening contacts of a structure with a fusible thread. The unit is connected to the main electrical circuit of the machine. The fuse (fuse) is mounted in a special housing for reliability.

How blocks are placed

There are several mounting blocks in total: two main ones and one additional one, which is located near the front passenger seat on the left side. To access it, you just need to unscrew the screws using a Phillips-type screwdriver. The main unit is located on the left side of the driver, at the bottom of the floor. It is also called "salon".

Opening is very simple: just turn the locks 90 degrees and open the lid. The engine compartment structure is located near the expansion tank, next to the battery. Each box has its own tight lid, which protects the internal mechanism from exposure to aggressive factors. Let's look at each of the blocks separately.

Space under the hood

Each of the elements is marked with the Latin letter “F”. This category includes:

• F1 – a dark green product designed to protect the engine control system and vehicle control unit;
• F2, 3 – PP of a blue hue, which belong to the general category. They are designed to protect all elements and circuits connected to fuses inside the cabin;
• F4 – bright red part, power – 50 amperes. Designed to protect the electric power steering structure;
• F6 - purpose - to protect the power circuit of the generator, a blue element with a power of 60 amperes.

All of the listed fuses are mainly designed for high capacities and currents; their main purpose is to protect the most important electrical components and systems of the vehicle. If any element burns out, the engine will not start, and a complete failure of all electrical equipment of the machine is possible.

Cabin fuses

There are also relays that imply a powerful load of electrical circuits. This placement is convenient: if a malfunction occurs, it is easy to find and diagnose (simply switch a separate circuit). The arrangement of parts inside the cabin is as follows:

• a 25 amp fan designed to blow over the radiator;
• element for heating the rear view glass;
• right and left headlights with high beam, each rated at 10 amps;
• signal (horn), power 10 A;
• "emergency";
• right and left low beam headlights, each with a power of 7.5 amperes;
• instrument panel output, terminal;
• stove ventilation system motor;
• interior light, instrument panel and stop signal (rear);
• "windshield wipers";
• fog lights;
• seat heating system;
• rear light with fog function;
• if necessary - reserve.

Thanks to such an accurate description, it is easy to find the cause of the problem and solve it. Also, it is quite simple to find the fuse for each individual system.

How to identify a faulty electrical circuit

Simply knowing the location of the fuse is not enough. It is more difficult to find the cause of the breakdown, eliminate it and select a new element. If a malfunction occurs, open the latches and unscrew the cover. First of all, check if the fuse is blown and find out the cause of the problem. What is needed for this? First of all, check the circuit that it protects, carefully inspect it all, from the beginning (node) to the power source. To do this, you can use a simple multimeter or a control lamp.

To detect a break or breakdown, you must perform the following steps:

• one of the probes of the equipment (multimeter) must be brought out to the machine panel. The same applies to the warning lamp;
• the ignition key is turned, the wire touches the terminal of the wire that is being tested. If there is no voltage, it is recommended to inspect the conductor input and take a measurement at that point;
• the steps are repeated at each site, identifying the problematic element.

It is imperative to make a conclusion about the possible cause of the breakdown. Most often, this may be a contact that is not connected or a burnt-out part or wiring.

The mounting blocks of the machine also contain relays that switch the load. Why is it so important to use electromagnetic relays? This is because it is necessary to protect the switch contacts from burning out if heavy load occurs.

Often the cause of a breakdown can be sticking relay contacts or a breakdown of the electric magnetic coil. If such malfunctions occur, the relay is not able to attract an electric magnet, so the contacts do not close. To properly solve this problem, it is recommended to contact a car service for a complete replacement of broken parts.

Checking the fuel pump Lada Kalina/Granta

If after turning the ignition key there is no buzzing sound from the fuel pump, then the first thing to check is the fuel pump fuse and relay. In the Lada Kalina and Lada Granta mounting block, the fuel pump fuse is F21 (15A), and the fuel pump relay is K12. If the fuse is good, do the following:

1. Turn on the ignition
2. Remove the fuel pump relay
3. Apply +12V to pin No. 11 of the diagnostic block, or place a jumper between 87 and 30 relay pins
4. Check by ear that the fuel pump is turned on

If the fuel pump does not turn off, then check:

1. Wiring and contacts between the fuel pump and the diagnostic block/fuel pump relay. To do this, check the voltage at the fuel pump chip using a test lamp or multimeter.
2. There is no connection between the fuel pump and the vehicle ground. Apply the mixture to the fuel pump (located under the rear seat).
3. The fuel pump is faulty. To check it, apply +12V directly to the contacts of the fuel pump (Attention! Remaining gasoline may ignite from a spark!).

In rare cases, the fuel pump does not work due to:

1. ECU (controller) malfunction
2. alarm malfunctions

Features of replacing broken parts

Consumables and replacement parts of a Priora car often need to be replaced. Often the cause is improper use of the cigarette lighter. It consists in the incorrect use of too high currents (from 30 to 40 amperes). What is a cigarette lighter? This is a metal part made in the shape of a spiral, the body of which is made of plastic. It is inserted into a connector specially designed for this purpose. After pressing, the cigarette lighter is connected to the on-board network and can be held in place using plates. At this time, a heating process occurs in the spiral.

This mechanism is unscrewed simply; if it jams, the design provides a special washer. When heated, it melts, shorting the power and causing fuses to blow. This is how the fuse box breaks down. The process of changing parts is quite simple and does not take much time. Another feature of the car is that if the heater and air conditioner are combined inside, the heater may not work at all.

In this case, the location on the surface of the damper, which will then have to be removed, and the micro-gearbox of the motor may change. The latter is connected to a tap that shuts off the supply of antifreeze. Such an arrangement of the air conditioner is impossible for the Priora, since it heats up to the specified temperature, then the sensor inside the cabin is triggered and the heater is turned off. The car becomes the same temperature as the air outside.

What to do if fuses often blow in a Priora

A fuse will never blow without a reason. In this case, a short circuit or serious overload may have occurred in the circuit.

If a short circuit can occur due to problems in the electrical wiring or consumer, then overloads occur only at the cigarette lighter fuse.

The use of car vacuum cleaners, compressors and other overly powerful devices in the cigarette lighter socket causes the fusible link to trip. If this happens too often, you can raise the rating of the standard insert by 5 Amps.

After this, you can continue to use your consumers, but you must constantly check the condition of the wiring for overheating.

If a fuse blows immediately after replacement, it is necessary to diagnose the vehicle for the presence of a short circuit in the electrical wiring. It is better to trust this to a professional auto electrician.

Removing the mounting block

First of all, disconnect the terminal from the battery and remove the unit cover. Next, you should unscrew the fastening screw on the instrument panel and remove the MB itself. This is easy to do: pry off the fastening hooks. Dismantle the relay and PP, press out the fixing parts of the electrical wiring terminals. Do not forget to mark all the wires that are removed from the MB - this will help in the future not to mix them up and mount them in the same place. Installation (reverse) is done exactly this way.

What you need to know about the additional block

In order to get to the additional unit, it is necessary to remove the floor covering and disconnect the terminal, block with electrical wiring from the electronic control unit. The fuse is removed using tweezers.

Electrical circuits of automobiles are protected by fusible links that prevent overheating and ignition of the wiring. Knowledge of the Priora's fuse diagram will allow the owner to detect a failed element. In addition, using a burnt element, you can establish an electrical unit operating in emergency mode.

Relay and fuse blocks on a LADA Priora car

The VAZ Priora passenger car, regardless of the type of engine installed, is equipped with several junction boxes. They are located under the hood and inside the car. The use of several boxes made it possible to separate circuits with high and low currents. In addition, separate small-sized mounting blocks were installed, introduced as the configuration expanded.

Main power fuse block

The vehicle's power circuits are protected by inserts installed on the positive terminal of the battery. The block is designed to protect circuits with maximum currents. To gain access to the fuses, you need to remove the plastic cover; this can be done without the help of tools.

Block diagram and its location in the car

The removal of the most powerful circuits on the Lada Priora into a separate unit located close to the battery ensured maximum protection of the car's electrical system from overloads.

The location and designation of the inserts is indicated in the photo. Depending on the year of manufacture and installed equipment, it is possible to install fuses of different ratings.

Priora power insert block

Explanation of fuse designations

Purpose and rating of the main block inserts.

The given fuse diagram for the Lada Priora is relevant for cars without an anti-lock brake system. The introduction of a hydroelectronic unit on the Priora-2 series car led to a change in the purpose of the inserts.

Purpose of fuses on the battery for Priora cars with ABS (starting from the one closest to the terminal):

• F1 - ECM protection (30 A);
• F2 - power steering (50 A);
• F3 - generator circuits (60 A);
• F4 - similar to F3;
• F5 - power supply to the ABS unit (40 A);
• F6 - similar to F5, but rated at 30 A.

Mounting block: relays and fuses in the passenger compartment

The unit includes fuses, several relays, and tweezers designed to simplify the procedure for replacing burnt out inserts. The content of the device depends on the vehicle configuration.

Block diagram and its location in the car

The unit is located in the plastic frame of the dashboard at the bottom of the driver's side. The outside of the box is closed with a removable cover installed around the steering column and secured with three locks located along the lower edge. To remove the cover, you need to turn the latches 90 degrees and remove the element from the latches by pulling it towards you.

The oval marks the location of the block installation

On cars, fuse ratings may differ depending on the year of manufacture of the car and the configuration. To determine the value of the fuse link, you should use the operating instructions for the Lada Priora.

When repairing fuses, it is necessary to take into account that the instructions for the Lada Priora car change several times a year. It is not recommended to use a manual from another car.

The “norm” option with the additional installation of an air conditioner has differences in the Priora’s fuse circuit. Elements that protect the device are placed in a separate engine compartment, discussed below. The mounting housing itself has not undergone any changes.

Block version “norm” with air conditioning

The purpose of fuse links in the “luxury” version of the car does not differ from the “standard + air conditioning” version. On cars, you can find both the block model 1118-3722010-00 and the Delphi version 15493150. The cases differ slightly in appearance, as well as in the location of spare inserts and the presence of tweezers on Delphi.

Deluxe mounting block option from Delphi

With the start of production of the modernized Priora-2, the contents of the body changed somewhat. In the interior units of cars, only one space for a relay and two cells for fuses are empty.

Block on Priora-2

Explanation of fuses and relays

Explanation of fuses in the “norm” version.

Precautionary measures

Fuses take care of all voltage drops, surges associated with insulation failure, and other causes of failure. The peculiarity of fuses is that they melt after a breakdown occurs. This has its advantages and disadvantages. The advantage is that the Priora driver can immediately see the cause of the breakdown and, knowing the purpose of each fuse, look for the cause in a certain place. However, this is also a disadvantage - you will have to throw out the blown fuse and buy a new one. Before checking the fuses, changing them, as well as searching for and eliminating the cause of the breakdown, you must disconnect the battery terminal marked “-”.

If this is not done, further actions will cause a short circuit and may also be dangerous to life.

Equally important is knowledge of the current passing through each of the fuses, since a mismatch between the capacity and the current in the circuit will lead to burning of the wiring. We must not forget that each fuse on the Lada Priora is responsible for its own part of the electrical wiring in the car, so before starting replacement work, it will not hurt to familiarize yourself with the diagram of their location. This diagram can be found in the machine manual.

It is extremely important to troubleshoot the vehicle's electrical problems before replacing the fuse. Otherwise, when you turn on the ignition, the new fuse may burn out again. Purpose of blocks It is worth considering each fuse block in more detail in order to know where to look for the cause of the malfunction. You need to start with the main and largest block, in terms of the number of fuses, located near the driver's seat. This block contains 32 fuses with a current varying from 5 to 30 A. They are responsible for the following devices:

• heated glass;
• seat heating;
• dimensions;
• stop signal;
• stove;
• dashboard;
• interior lighting;
• wiper;
• low and high beam.