January 15, 2015 Lada.Online 2 819 905 315
The relay and fuse box is also called the mounting block or black box. In the event of a car breakdown related to electrical equipment, the fuses and relays are first checked. If a fuse is blown, you must first determine the cause of its blown before replacing it.
Scheme
The entire line of VAZ 2109 cars can be divided into two branches - those produced before 1998 and those produced after 1998.
Older cars are equipped with fuse blocks whose marking is 17.3722. This power supply consists of a housing and an engineering board. Wire contacts, fuses and relays are soldered to the board.
Newer versions of nines, the production of which began in 1998, here the power supply is marked 2114-3722010-60. Here we are already seeing fuses.
If we talk about fuse blocks, the factor of the fuel injection system used - carburetor or injector - plays absolutely no role. BP will differ only by the year of manufacture of the car. Therefore, the mounting blocks for the carburetor and injector are the same.
The required mounting block is also located the same everywhere - in the engine compartment opposite the driver's seat, almost under the windshield.
Differences
Are there any differences between the old and new versions of the power supply? Of course. They are as follows:
- The parts of the mounting block are marked differently;
- The fuse ratings are different;
- The new power supply does not have a relay for the cooling system fan motor and a time relay for the rear window washer device.
How to properly replace a burnt out element
You need to pull the fuses out of the corresponding sockets using special plastic tweezers, which can be found here, in the upper right corner of the VAZ 2114 mounting block. You cannot pry fuses on non-energized circuits with any metal objects due to the risk of a short circuit. It should be taken into account that the electrical circuits of the sound signal, alarm, etc. are always energized. To ensure safety when repairing the circuits, the circuit must be de-energized - you just need to disconnect the wire from the “negative” terminal.
It is not always possible to visually accurately determine the performance of fuses. It will be possible to make a clear decision only after the “ringing”. To do this, you will need a regular tester, which will need to be set in advance to the “dialing” mode. After this, it will be enough to simply attach two terminals of the tester to the terminals of the suspicious fuses. If a characteristic sound is heard, the fuse is good - the cause of the malfunction of the car’s equipment is not in it, but probably somewhere further in the wiring or in the device itself.
Old style power supply
Let's first consider the old-style power supply units, which are still quite often found on VAZ 2109 cars. Moreover, as we have already said, with both injection and carburetor engines.
| Fuse number | Current strength | The chain he protects |
| F1 | 10A | Backup fuse |
| F2 | 10A | Turn signal indicators, hazard signal breaker (in hazard mode), hazard warning light |
| F3 | 10A | Rear brake lights, interior lighting |
| F4 | 20A | Rear window heating element, rear window heating switch contacts, carrying socket, cigarette lighter |
| F5 | 20A | Horn (horn), horn switch |
| F6 | 30A | Backup fuse |
| F7 | 30A | Heater fan electric motor, windshield washer electric motor, electric radiator fan relay, rear window heating relay, rear window heating indicator light, glove box light |
| F8 | 7.5A | Backup fuse |
| F9 | 7.5A | Backup fuse |
| F10 | 7.5A | Left side light |
| F11 | 7.5A | Right side lamp |
| F12 | 7.5A | Right low beam headlight |
| F13 | 7.5A | Left low beam headlight |
| F14 | 7.5A | Left high beam headlight, high beam indicator lamp |
| F15 | Right high beam headlight | |
| F16 | 15A | Turn signal indicators and emergency flasher relay-breaker (in the turn signal indication mode), turn signal indicator indicator lamp, rear reverse lights, gear motor and windshield wiper activation relay, oil pressure indicator lamp, hand brake indicator lamp, coolant temperature indicator, fuel level indicator, fuel reserve warning lamp, voltmeter |
BP 17.3722
Relay
In addition to the fuse designations, it will be useful for you to know which relay number in the mounting block is responsible for which functions.
| Relay number | Functions |
| 1 | Performance of the front optics cleaning elements |
| 2 | Rear window washer motor performance |
| 3 | Protection against breakage of turn signal and light signaling lamps |
| 4 | Protection against failure of the windshield wiper motor |
| 5 | Allows you to determine the performance of the lamp |
| 6 | Rear window defogger overvoltage protection |
| 8 | High beam lamps |
| 9 | Low beam lamps |
| 11 | Responsible for the operation of the engine cooling fan. If this relay fails, the risk of engine overheating increases. |
| 12 | Klaxon operation |
Old PSU
What else is this fuse responsible for?
Fuse element F10 is responsible for keeping the instrument lights on. In addition, it ensures the operation of the side lights on the left side of the car, the license plate light, the cigarette lighter, the ashtray and the heater adjustment.
If the instrument backlight fuse on a VAZ 2114 blows, the left side lights, license plate lights, ashtrays and other above-mentioned elements should also not work. To diagnose a malfunction, you need to find this fuse in the mounting block and inspect it. Often the defect is clearly visible externally.
You can also check it with a multimeter. If there is voltage at one end of the part, but not at the other, it has failed. Replacing an element with a known good one also helps diagnose a breakdown. If everything works after this, the reason has been established correctly. The fusible element is cheap. Therefore, you should look for the cause of the breakdown by replacing it. This usually helps solve the problem. If this does not help, you need to consider other faults.
New model power supply
Here the mounting block diagram is arranged a little differently, but it is more relevant for owners of the VAZ 2109, since most of the nines that have survived to this day are modernized versions.
The scheme is relevant for both carburetor and injection types of engines.
| Fuse number | Rated current | The electrical circuit for which it is responsible |
| 1. | 8A | Backup fuse |
| 2. | 8A | Backup fuse |
| 3. | 8A | Backup fuse |
| 4. | 16A | Radiator fan relay winding, electrical circuit of switch and heater motor |
| 5. | 3A | Hazard warning switch in turn signal mode, turn signal switch, turn signal switch, turn signal warning light, turn signal warning light, reverse optics switch, reverse lights, tachometer, voltmeter, gasoline level indicator, gasoline level sensor, gasoline level warning light, pointer coolant temperature, temperature sensor, warning lamp and emergency oil pressure sensor, brake emergency lamp, brake system hydraulic switch, hand brake switch |
| 6. | 8A | Brake light switch and bulbs, interior lighting |
| 7. | 8A | Room lighting lamps, indicator lamp for switching on the dimensions, lamp for illuminating the heater and cigarette lighter handles, glove compartment lamp, switch and lamp for instrument panel illumination |
| 8. | 16A | Horn, horn switch, radiator fan motor |
| 9. | 8A | Left side lamp, left rear side lamp |
| 10. | 8A | Right side lamp, right rear side lamp, fog light switch, fog light indicator light |
| 11. | 8A | Turn signal switch and breaker, turn signal lamps, warning lamp in emergency mode |
| 12. | 16A | Cigarette lighter, socket for carrying lamp |
| 13. | 8A | High beam right headlight |
| 14. | 8A | Main beam of the left headlight, high-range optics warning lamp |
| 15. | 8A | Low beam right headlight |
| 16. | 8A | Low beam left headlight |
Relay
As for the relay in the mounting block of the new model for the VAZ 2109, the pinout is as follows.
| Relay number | Its functions |
| K1 | Without it, the rear window washer motor will not work. |
| K2 | Responsible for the operation of turn signal lamps and light signaling |
| K3 | Provides operation of the windshield wiper |
| K4 | Protects brake lights and vehicle dimensions |
| K5 | Provides operation of high beam lights |
| K6 | Guarantees operation of the optics washer device |
| K7 | Protects the power window motor if your vehicle has one. |
| K8 | Sound signal or just a horn |
| K9 | Protects against high voltage going to the engine cooling fan |
| K11 | Responsible for the operation of the rear window heating device |
| K12 | Provides operation of low beam lights |
It is necessary not only to understand the location of a particular fuse or relay, but also to know how to replace a failed element.
Fuse F10 is on
the 7.5A-10A flags in socket F10 began to burn one by one (left dimensions, button illumination in the cabin, cigarette lighter illumination, dashboard illumination, etc.) enough when it happens - you can drive for a day or burns out immediately, in a couple of minutes ! There have been 10W dimensions in the back for six months now, and 5W dimensions in the front.
Re: short, obviously there is nowhere for short to crawl out of! it started when the left tail light bulb (10 watt) burned out; there was no replacement - plugged in 21 watt, drove for 2 hours - the 7.5A flag burned out, stuck the same one in - a couple of minutes - burned out again, plugged in 10A - burned out after 10 minutes
plugged in the left rear marker with 10 watts, set it to 7.5A - it burned out after half an hour, set it to 10A - burned out during the day, set it to 5A - drove for a day, then burned out, set it to 10A, and lowered the brightness of the panel backlight - I'm still alive for another day
What nonsense? A visual inspection of the trunk did not reveal any defects!
Re: short is obvious > there is nowhere for any short to crawl out of! it always comes from
