This material provides information on the locations and diagrams of fuses and relays for a car Audi 80 B4. Audi introduced this model in 1991. The main difference from the previous one is the updated design of the hood, bumper and headlights. Higher quality materials were used in the interior trim and airbags appeared. Newly designed rear axle and gas tank. This model was produced in 1992, 1993, 1994 and 1995.
The Audi 80 b4 has two main relay and fuse blocks. The main one is located under the smoke space of the engine compartment, on the left side, closer to the wipers. The second one is under the dashboard in the cabin.
Audi 80 B4 fuses and relays
This material provides information on the locations and diagrams of fuses and relays for the Audi 80 B4 . Audi introduced this model in 1991. The main difference from the previous B3 is the updated design of the hood, bumper and headlights. Higher quality materials were used in the interior trim and airbags appeared. Newly designed rear axle and gas tank. This model was produced in 1992, 1993, 1994 and 1995.
The Audi 80 b4 has two main relay and fuse blocks. The main one is located under the smoke space of the engine compartment, on the left side, closer to the wipers. The second one is under the dashboard in the cabin.
Possible wiring faults and ways to eliminate them
Most of the cases due to which a car owner contacts a service center are faults in the wiring. Workshops usually demand a lot of money for repairs. However, knowing the most common problems and how to fix them, you can save yourself time, as well as a good amount of money. Let's look at the main breakdowns that occur for Audi 80 b3 drivers:
- Battery is completely or partially discharged. In this case, it is enough to simply charge the battery. If it is already faulty, it must be completely replaced;
- The fuse has broken. If the safety elements break down, you only need to replace the faulty part with a new one;
- There are breaks in the circuit. This is a pretty serious problem. Most often, such a malfunction occurs due to incorrect installation (laying) of the wiring (this can occur either due to incorrect actions by the manufacturer or the car owner himself). In this case, you need to examine the electrical circuit of the car and use it to find the section of the circuit that has become faulty. When changing the wiring itself, under no circumstances should the wires be placed near moving elements (they can deform the wiring);
- Oxidation of contacts at connectors. Quite often there are cases when the section of the circuit itself is intact, all fuses are also in order. But the electrics still don't work. Car owners are then simply at a loss. The problem in this case may lie in the oxidation of the wires. If such a breakdown occurs, you can clean the oxidized contacts. If the situation is neglected, then contact replacement is required.
Fuse box in the engine compartment
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- relay
- diagnostic connector
- fuses 1-21. Cars with diesel engines have 22 fuses.
- additional fuses 23-32
- four spare fuses
- relay designation on the distribution panel cover
- clamp for removing and installing fuses
The data presented is universal. Refer to the description on the back of the protective cover.
Scheme of this block
Decoding
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| № | Purpose |
| 1 | 15A Fog lights, rear fog lights |
| 2 | 15A Hazard alarm |
| 3 | 30A Horn, heated seats |
| 4 | 15A Electronic clock, trunk light, interior light, vanity mirror, reading light, cigarette lighter, on-board computer, automatic air conditioning, radio, self-diagnosis system |
| 5 | 30A 2nd speed radiator fan |
| 6 | 5A Rear right side and parking lights |
| 7 | 5A Rear left side and parking lights |
| 8 | 10A Right high beam headlight, high beam warning light |
| 9 | 10A Left high beam headlight |
| 10 | 10A Right low beam headlight, right headlight adjustment motor |
| 11 | 10A Left low beam headlight, left headlight adjustment motor |
| 12 | 15A Instrument panel, reversing lights, control system, automatic transmission, differential lock, on-board computer, speed control, retarder relay, interior lighting with, electronic thermal switch, relay for turning on the radiator fan |
| 13 | 15A Fuel pump |
| 14 | 5A License plate light, instrument panel light, engine compartment light, glove compartment light, automatic air conditioning |
| 15 | 25A Turn signals, windshield wiper, windshield washer pump, heated windshield washer nozzles, radiator fan relay, air conditioning |
| 16 | 30A Heated rear window, heated mirrors |
| 17 | 30A Interior blower fan, automatic air conditioning |
| 18 | 5A Electric mirrors |
| 18 | 15A Rear window wiper (Avant) |
| 19 | 10A Central locking, heated lock switch cylinder, anti-theft system |
| 20 | 30A Radiator blower, 1st speed, interior fan |
| 21 | 10 Diagnostic connector |
| 22 | Not used (vehicles with gasoline engines) |
| 22 | 80A Glow plugs (vehicles with diesel engines) |
Additional fuses for Audi A 80 B4 bottom row (if equipped)
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| 23 | Not used |
| 24 | Not used |
| 25 | 5A Lambda probe heating. Not used for vehicles with diesel engines |
| 26 | 30A Trailer Connector |
| 27 | 10A Ignition/fuel injection system |
| 28 | 10A Ignition/fuel injection system. Not used for vehicles with diesel engines |
| 29 | 10A Brake light |
| 30 | 5A Speed control (vehicles with automatic transmission), Not used for vehicles with diesel engines. |
| 31 | 15A ABS, differential lock |
| 32 | 10A Ignition/fuel injection system For vehicles with TD diesel engines - fuel shut-off valve |
Fuses 27 and 28 can be equipped with a red plastic cover with the inscription “Motor/Moteur”
Fuse number 4 at 15A is responsible for the cigarette lighter.
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- Relay for fog lights and tail lights. For cars without fog lights, there is a jumper in this place
- Radiator fan relay (for cars without air conditioning), radiator fan relay for turning on the 2nd stage of rotation
- Fan relay
- Headlight washer relay
- X-contact unloading relay
- Interior blower relay (manual air conditioning), air conditioning fan relay for speed at 2nd stage (automatic air conditioning)
- Horn relay
- Anti-theft alarm relay (vehicles with manual transmission). Cars without such a system have a jumper. For vehicles with automatic transmission this space is free.
- Wiper interval relay
- Fuel pump relay
- Radiator fan relay for turning on the 1st stage of rotation.
Attention! For vehicles with diesel engines, pos. 2 and 3 are not occupied and relay 10 is the glow plug relay.
Repair and maintenance book
If you still have questions, ask them in the comments or download the repair and operation manual for the Audi 80 1991-1995: “ “. To view, use the djvu reader program.
Each electrical device in a car is designed for a specific voltage. The diameter of the supply wire is calculated taking into account this voltage. If the current consumption in a certain circuit, for example, due to the connection of additional consumers, increases, then the supply wire experiences additional load. It may overheat or even burn out if the flow of current is not interrupted in a timely manner. This function is performed by fuses. To avoid complete blackout of the on-board network, each circuit has its own fuse. However, connections to the battery, alternator, starter and ignition switch do not have fuses.
To remove and replace fuses, use the plastic clip that is attached to the cover of the central distribution panel (see illustration 3.0).
If a new fuse blows immediately after installation, make sure that the fuse of the required rating was installed, and not a smaller one. If the rating corresponds, then check individually all consumers of this circuit. Use the appropriate electrical diagram for this. If necessary, disconnect all consumers in the circuit and then connect one at a time. If, when connecting the next consumer, the fuse blows, then this consumer is faulty.
Fuse diagram
Its principles have not changed significantly since the advent of the B2 generation in 1987. An explanation of the circuit translated into Russian is presented in the table below, as well as a list of relays and the order of their arrangement, which can be used as a printout if necessary.
| Fuse | Power, A | What protects |
| 1 | 15 | Fog lights, rear fog lights |
| 2 | 15 | Emergency crew |
| 3 | 30 | Horn, heated seats |
| 4 | 15 | Electronic clock, trunk light, interior light, vanity mirror, reading light, cigarette lighter, trip computer, automatic air conditioning, radio, self-diagnosis system |
| 5 | 30 | Radiator fan speed 2 |
| 6 | 5 | Rear right dimensions |
| 7 | 5 | Rear left dimensions |
| 8 | 10 | Right high beam headlight, high beam warning light |
| 9 | 10 | Far left headlight |
| 10 | 10 | Right low headlight, electric motor for adjusting the right headlight position |
| 11 | 10 | Left low beam headlight, left headlight adjustment motor |
| 12 | 15 | Instrument panel, reversing lights, control system, automatic transmission, differential lock, on-board computer, speed control, retarder relay, interior lighting, electronic thermal switch, relay for turning on the radiator fan |
| 13 | 15 | Gasoline pump |
| 14 | 5 | License plate light, instrument panel light, engine compartment light, glove compartment light, automatic air conditioning |
| 15 | 25 | Turn signals, windshield wiper, windshield washer pump, heated windshield washer nozzles, radiator fan relay, air conditioning |
| 16 | 30 | Heated rear window, heated mirrors |
| 17 | 30 | Interior fan, automatic air conditioning |
| 18 | 5 | Electric mirrors |
| 18 | 15 | Rear window wiper (Avant) |
| 19 | 10 | Central locking, heated lock switch cylinder, anti-theft system |
| 20 | 30 | Radiator fan, 1st cabin fan speed |
| 21 | 10 | Diagnostic connector |
| 22 | — | Not used (cars with gasoline engines) |
| 22 | 80 | Glow plugs (cars with diesel engines) |
| 23 | — | Not used |
| 24 | — | Not used |
| 25 | 5 | Lambda probe heating. For cars with diesel engines – not used |
| 26 | 30 | Trailer connector |
| 27 | 10 | Ignition and fuel injection system |
| 28 | 10 | Ignition and fuel injection system. Not used for vehicles with diesel engines |
| 29 | 10 | Stop signal |
| 30 | 5 | Speed control (cars with automatic transmission) Not used for cars with diesel engines. |
| 31 | 15 | ABS, differential lock |
| 32 | 10 | Ignition and fuel injection system. Cars with TD diesel engines have a fuel shut-off valve |
The main block of the engine compartment is equipped with 11 relays, the purpose of some of which depends on whether a diesel or gasoline engine is installed on the car:
- R1 - foglights and rear lights. Models without fog lights have a jumper;
- R2 — radiator blower fan, if air conditioning is not installed;
- R3 — fans on;
- R4 — headlight washer;
- R5 - X-contact of the unloading relay (indicated by the number 214 in the latest generations);
- R6 — cabin fans (manually controlled air conditioning), air conditioning fan for speed at the 2nd stage (automatically controlled air conditioning);
- R7 - sound signal;
- R8 - sound alarm relay for anti-theft system (cars with manual transmission). Cars without anti-theft devices have a jumper installed, while cars equipped with automatic transmissions have a free slot;
- R9 — interval mode of glass cleaner;
- R10 — fuel pump, single injection;
- R11 - radiator fan to turn on the 1st stage of rotation /
In the Audi 80 B4 with a diesel engine, 2 and 3 relays are in reserve, and R10 is responsible for the preheating plugs. You also need to take into account that in the B4 generation the relay, designated by the number 208, is responsible for the fuel pump, while in the B3 – 215.
The additional relay block, which is located under the steering wheel in the car interior, has the following description, in general terms, preserved from the birth of the B2 and especially B3 generations in 1989.
There are 18 relays in total, their designations are deciphered:
- ABS systems.
- Seat belt warning light.
- Interior lighting control unit.
- Air conditioner clutch relay unit.
- Rear window wiper and washer system.
- Oil pressure monitoring devices, front lighting control unit, the breakdown of which can be found out if this relay clicks.
- Not used.
- Not used.
- Automatic gear shift lock (only for vehicles with automatic transmission).
- —
- —
- Heated seats.
- Heated driver's seat.
- Sunroof on the car roof.
- Sunroof ECU and power door windows.
- Likewise.
- Anti-theft alarm warning lights.
- Power door windows, power sunroof, power seat circuit breaker.
Turn signal fuses and relays
Located in the engine compartment block number 15 with a power of 25 Amps. There is no turn signal relay in the factory configuration; the connection is carried out by the car owner independently. Its absence or breakdown is indicated by a buzzing sound.
Cigarette lighter fuse
Since 1988, in all generations of the Audi 80, it is located in the block under the hood at number 4 and has a power of 15 A.
Cooling Fan
Elements 17 and 20 of the engine compartment block correspond. The second protects the switching system. The power of both is 30 A.
Low beam
The fuses in the Audi 80 are numbered 10 and 11, with a power of 10 Amperes. They are located in the block under the hood.
Power window fuses and relays
They are located inside the car. ESP relays are numbered 15 and 16.
In the cabin there are four relays of the interior engine unit - 14, 15, 16 and 18.
Instrument lighting
It is located in the engine compartment block number 14. Its power is 5 Amperes.
Wipers
Stove
There are no such fusible elements in the factory configuration.
Signal fuses and relays
The brake light insert for the Audi 80 has number 29, a power of 10 Amperes and is located in the engine compartment block.
Radio tape recorder
The fusible element is not included in the factory configuration.
High beam
The 8th and 9th elements of the main block of the engine compartment, each with a power of 10 Amperes, are responsible for it.
Dashboard
Its operation is protected by fuse No. 12 for 15 Amps of the main unit.
Reverse
Are protected by fuse 12.
central locking
It is protected by 10 Amp element #19 in the main unit.
Generator fuse and relay
The current regulator in the Audi 80 does not have its own inserts as standard, but this is not an expensive item and it is expected that car owners will install it themselves.
Dimensions
Protection is provided by 5 A elements 6 and 7, which are located in the main block of the engine compartment.
Speedometer
Does not have its own fuse as standard.
Washer
A fusible element responsible for protecting the windshield wiper No. 15 with a power of 15 A. 5 relays of the additional unit are responsible for the same element.
Audi 80 fuel pump relay: where is it located
Fuel pump insert No. 13 and power 15 A, located in the main block. There is also a relay number 10. If the latter breaks down, you need to check which engine is installed in the Audi - AVK or AVT, since this determines which device you need to choose.
Where is the starter relay located?
For all types of motor, including ABK 2 0, it is installed additionally. Its price is not high.
Glow plugs
This relay is present only in cars with a diesel engine, where it is installed at number 10 in the cabin block.
Emergency crew
This relay is not installed at the factory.
Unloading relay for headlights
Relay No. 5 of the cabin unit is responsible for unloading in the Audi 80.
Oil pressure control relay
Responsible for No. 6 in the additional block.
Charging relay
For Audio 80 with a diesel engine, this is element No. 5 of the additional unit.
Ignition
Audio 80 is not included in the factory configuration.
Resistor
Fuses and relays Mercedes w124
A failed heater resistor is a fairly common malfunction among owners of Audi 80 cars.
At the same time, fixing such a breakdown yourself is not so difficult. There is no need to go to a car service center and pay someone money for a relatively basic repair. You just need a new resistor, as well as an understanding of the location of the desired object.
It is not difficult to determine that the heater on an Audi 80 does not work precisely because of a resistor failure. A clear sign of such a malfunction is the heater turning on exclusively at speed 4, while fan blowing modes 1, 2 and 3 do not turn on.
Yes, first of all it is recommended to check the condition of the contacts in the control unit, as well as the integrity of the wires. It cannot be ruled out that they are the problem. But if the check did not show any problems in the electrical circuit, then the problem is in the heater resistance resistor. It periodically burns out and therefore needs to be replaced.
If we talk about the location, you will find the resistor directly on the electric motor of the stove. To access it you will need to open the glove compartment and remove it from the rails. In fact, getting to the resistor is extremely easy if you know how to remove the glove compartment.
Interior heater duct
You need to disconnect the connector with the wires and remove the resistor from the latches. The resistor fails due to the thermal fuse blowing. It needs to be replaced to restore the functionality of the element.
It's up to the motorist to decide, but Audi 80 owners usually use 2 methods:
- buy a new resistor and install it in place of the old one;
- restore the old resistance resistor through makeshift repairs.
Objectively, the best solution would be to purchase a new element that has a quality guarantee from the manufacturer. But this option is more expensive financially.
And since it is important for many to save money, it is worth describing the option of repairing and restoring the resistor
- Here you can take a piece of wire. But the option is not the best. It is preferable to use a simple 10 Amp fuse;
- Using wire cutters, the old fuse is bitten off, and a new 10-amp element is screwed in its place;
- Using copper wires in a protective sheath, as well as electrical tape, the contacts of the resistor are connected to the contacts of the fuse;
- Next, the assembly is assembled in the reverse order;
- The performance of the heater is checked at all speeds.
The experience of motorists shows that such a repair scheme for the heater resistance resistor on Audi 80 cars has every right to exist. But if in doubt, just buy a new resistor and change it according to the instructions. This is literally 10 minutes of your time.
Heating system radiator
Although fuses, relays and resistors are small parts of a car, they can play a key role in many issues. Including the performance of the heating system on Audi 80 cars in different bodies.
Moreover, checking the condition of the components considered is quite simple. The automaker has provided convenient access to the fuse box and resistor. Even the heater control unit is not as difficult to disassemble as some might think. A few latches and mounting screws separate you from it.
How to remove the fuse box
Carry out the procedure with great care so as not to damage anything. For this:
- lift the hood lid;
- disconnect the negative terminal of the battery;
- the interior unit is hidden by a lid with handles that pull towards you;
- unscrew the screws holding the mounting frame;
- under the frame, unscrew the 4 screws holding the block itself;
- Unscrew the screws and remove the block.
Location
Foreign-made vehicles are mostly equipped with many electrical appliances that require protection. This is what fuse blocks are used for - to protect equipment from overvoltage. Audi 80 b3 or b4 cars, like other foreign cars, are equipped with a fuse box and relay.
The block can be found in the engine compartment. After opening the hood, you will see the fuse block (hereinafter referred to as the fuse block), which is located under the windshield. It is hidden by a plastic cover designed to protect it from moisture and debris.
This fuse box contains 31 parts that protect the wiring circuits. There are also four spare components here. In addition, in this fuse block you can see a special connector, which is necessary to connect a tester for diagnosing the on-board computer. The fuse diagram and table of their assignments is given below.
Power supply circuit
This scheme is relevant for Audi 80 b3 and b4 cars.
As noted above, in Audi 80 b3 and b4 cars, not only fuses, but also relays are responsible for the safety of devices. These components are responsible for the operation of the power windows, power sunroof, if equipped (depending on equipment) and the front seat adjustment devices. There is also a device responsible for the operation of the radiator fan of the cooling system.
Purpose
Now let's move on to the purpose of the power supply components. The tables are presented below.
Regarding relays, this information will probably also be useful to you.
| Serial number | What protects |
| 1 | Ensures the safe operation of fog lamps and tail lights, as well as the bridge, if the vehicle is not equipped with fog lamps. |
| 2 | This part protects the cooling system fan from failure (relevant for vehicles not equipped with a climate control system). |
| 3 | Provides the functionality of the ventilated device activation control unit after the motor is turned off. |
| 4 | This device allows the headlight washer system to function safely. |
| 5 | X-contact relief component. |
| 6 | For vehicles with manual air conditioning, this component performs the function of protecting the fan circuit, and on cars with an automatic climate control system and some other engine variations, the sixth number designates the relay responsible for the operation of the second cooling system fan. |
| 7 | Responsible for the functionality of the steering horn. |
| 8 | This number allows you to ensure the functionality of the alarm system in Audi 80 cars equipped with a manual transmission. If your vehicle is equipped with an automatic transmission, this location will remain open. |
| 9 | Windshield wash intermittent component. |
| 10 | Gasoline pump Audi 80. |
| 11 | The first fan of the cooling system. |
Audi 80
The third generation was produced since 1986 in a round, fully galvanized body for protection against corrosion, with a soft wedge shape. The year of manufacture of the car is quite old, so the likelihood of problems with electrical or appliances is high.
In the event of an emergency situation related to electrical devices, you should first check the integrity of the fuses and relays of the Audi 80
. This article will help you.
