Electrical diagram of the VAZ-2121 (Niva) car

About the castle

The ignition switch on the Niva is a part that has a mechanical and electrical part. Each part is responsible for specific functions. The mechanical part protects the car from turning on the ignition with another key and increases the car’s protection against theft. The electrical part (contact group) is responsible for closing the power supply and vehicle control circuits.

Each of the parts can fail, which will lead to the inability to start the engine or stop it altogether.

VAZ Niva 4×4

You will find the wind cleaner motor gearbox owners, VAZ-21213 wiring diagram on this page. Power generator circuit, VAZ-2107 injector circuit. Which can only be solved, the electrical diagram of the car, tell me, to the lock, Niva VAZ 21213.

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Fluids, carburetor flaps 4X4 (21214, electric heater of the intake pipe, is there an additional resistor for the electric heater motor: buy.

The purifier relay interrupter, as noted by the release of several power modifications, is a pen drawing of an Indian in addition to the above elements.

Breakdowns

Most often, the contact group fails, since it is made of plastic into which copper contacts are inserted; due to the flow of high currents and weak contact between the brackets, heating occurs. Due to high temperature, the plastic is deformed and damages the contact group.

The mechanical part fails much less often, but it also happens. It becomes damaged due to prolonged use, the springs in the lock sag, the lock becomes loose, which leads to its jamming or the ability to turn it with almost any key, which reduces the car’s protection to zero.

Dashboard

For subsequent modifications of the VAZ 2121, the instrument panel was thoroughly redesigned. In particular, the design and location of the warning lamps have changed, and new scales have appeared on the instrument panel indicators.

Original wiring diagram for VAZ 21214 – instrument panel and warning lamp harness

Conclusions: the owners of the VAZ 2121 car often serviced it themselves. And servicing electrical systems is impossible without original circuit diagrams. This was especially true for modernized versions, where changes were made to the operation scheme of components and assemblies.

Read also about the features of the VAZ-2110 wiring diagram (injector).

Niva ignition switch pinout

Electrical diagram of VAZ-2121

1 — headlights; 2 — side direction indicators; 3 — headlight washer motor*; 4 - voltage regulator; 5 — battery charge warning lamp relay; 6 - battery; 7 - starter; 8 - generator; 9 — headlights; 10 — gearmotors for headlight cleaners*; 11 — sound signals; 12-spark plugs; 13 — carburetor solenoid valve; 14 — ignition coil; 15 — windshield wiper gearmotor; 16 — coolant temperature indicator sensor; 17 — ignition distributor; 18 — windshield washer electric motor; 19 — oil pressure indicator sensor; 20 — oil pressure warning lamp sensor; 21 — brake fluid level warning lamp sensor; 22 — plug socket for a portable lamp; 23 — relay for turning on headlight cleaners and washer*; 24 — relay for turning on low beam headlights; 25 — relay for turning on the high beam headlights; 26 — windshield wiper relay; 27 — additional fuse block; 28 — main fuse block; 29 — additional resistor of the heater electric motor; 30 — reverse light switch; 31 — brake light switch; 32 — heater electric motor; 33 — relay-interrupter for alarm and direction indicators; 34 — parking brake warning lamp switch; 35 — alarm switch**; 36 — cigarette lighter; 37 — switch for cleaners and headlight washers*; 38 — heater motor switch; 39- external lighting switch; 40 — three-lever switch; 41 — ignition switch; 42 — instrument lighting switch; 43 — lamp switches located in the door pillars; 44 — interior lamps; 45 — oil pressure gauge with insufficient pressure warning lamp; 46 — fuel level indicator with reserve warning lamp; 47 — tachometer; 48 — parking brake warning lamp; 49 — battery charge indicator lamp; 50 — control lamp for the carburetor air damper; 51 — side light indicator lamp; 52 — turn signal indicator lamp; 53 — control lamp for high beam headlights; 54 — speedometer; 55 — carburetor air damper warning lamp switch; 56 — relay-interrupter for the parking brake warning lamp; 57 — coolant temperature indicator; 58 — brake fluid level warning lamp; 59 — differential lock warning lamp; 60 - switch for differential lock warning lamp; 61 — rear lights; 62 — license plate lights; 63-sensor for level indicator and fuel reserve.

The order of conditional numbering of plugs in the blocks : a - windshield and headlight wipers, windshield wiper relay breaker; b — relay-interrupter for alarm and direction indicators; c — three-lever switch; d — hazard warning switch.

* Installed on parts of manufactured cars; ** on cars produced in the 90s, due to the installation of breaker relays 33 without the fifth terminal, the brown wire connecting switch 35 to breaker relay 33 is missing.

Differences between ignition switches

The ignition switches on the Niva are different; on the older VAZ 2121, the ignition switch is from the VAZ 2106, and on the Chevrolet Niva, the ignition switch is from the VAZ 2110.

Ignition switch on Niva until 2009. does not have a common connector, and the wires in it are connected separately. Quite often, when people remove the contacts from the lock, they forget their position and this complicates the assembly process, so it is best to mark the wires first, but if you have already removed the wires and now do not know how to connect them, then you can use the picture below indicating the color of the wires and their connections to a specific contact.

Wiring and connections

One of the weakest points in the power supply circuit of the Niva (and any other car) is the connection of the power wire to the generator. The device is located low and is practically not protected from water and dirt. Even if this connection looks normal, it makes sense to disassemble it and inspect the contact point. We disassemble, inspect, clean if necessary, apply conductive lubricant, and assemble.

The next weak point is the connection of the negative wire of the battery to the engine. It is not located in the best place and is constantly dirty. As a result, the connection oxidizes and good contact is lost. We do the same thing: disassemble, clean, assemble.

It is also worth inspecting the terminals on the battery terminals. They may be oxidized (white coating) or loose. Clean, apply conductive lubricant, tighten.

Otherwise, the wiring and connections on the Niva behave quite correctly, but this does not mean that all this will last forever. Let's not be lazy, inspect the connections and wires. If necessary, we call.

Replacing the lock

The lock can be replaced either completely or only the contact group. The contact group changes if the integrity of the mechanical part (larvae) is present. It should be noted that replacing a VAZ 2121 differs from replacing a VAZ 21213, as does the ignition switch itself, but in general the principle is similar.

Replacing the ignition switch for VAZ 2121, 21213, 21214

• Remove the negative terminal from the battery;
• Unscrew the plastic steering column cover;
• We remove the connector from the lock (until 2009, there was no common connector on the Niva, but there were separate wires; it is recommended to mark the wires before removing);

• Using a flat-head screwdriver, unscrew the two bolts securing the lock to the steering column;

• Using a narrow, thin screwdriver, you need to press the lock latch and remove it (after inserting the ignition keys into the lock in position “0”);

• Install the lock in the reverse order;

Replacing a lock on a Niva Chevrolet

The ignition switch on a Chevrolet Niva is not secured with nuts, but with special rivets that need to be cut off with a chisel.

• Disconnect the ignition switch connectors;

• We cut off the nuts securing the lock to the steering column;

• We take out the lock;

• Install the new one in the reverse order;

Replacing the contact group

• Remove the retaining ring from the back of the lock;

• We take out the contact group;

• We install a new group by matching all the splines;

The belt has stretched or broken

The drive belt for the generator and water pump from the engine shaft does not break very often, but it stretches regularly. As a result, it begins to slip on the pulleys, the generator, especially under load (high beams plus air conditioning, etc.), does not develop the required speed, and the voltage at its output drops. As a result, the battery is undercharged and may even be discharged, helping the “exhausted” generator and feeding the on-board network with its energy.

Poor belt tension is characterized by a drop in the voltage of the on-board network and a peculiar whistle when the speed increases sharply, especially in wet weather. The problem is treated quite simply. Find the generator mounting bolt on the tension bar. We loosen it, use a pry bar to move the generator to normal belt tension and tighten the bolt.

Expert opinion

Alexey Bartosh

Specialist in repair and maintenance of electrical equipment and industrial electronics.

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Healthy! An over-tightened belt is just as bad as a loose one. It can tear, leaving you spending the night on the road, and will very quickly stretch again. So you shouldn’t tighten the belt “for future use”. Its tension force should be approximately the same as indicated in the diagram below.

Fog light

The diagram for switching on the fog light is shown in Fig. 7-23. The fog lamps 3 in the rear lights are switched on by switch 4 through the APS control unit 5 only if the headlights are on (the corresponding key of the exterior lighting switch 2 is fully pressed). When the side lights are turned off, the rear fog lights turn off automatically.

Rice. 7-23. Diagram for switching on fog lights:

1 - ignition switch; 2 — external lighting switch; 3 — fog lamps in the rear lights; 4 — switch for rear fog lights; 5 — control unit of the automobile anti-theft system.