How to remove the ignition switch on a VAZ-2107 car and replace it yourself?

02/04/2022 1 904 VAZ 2107

Author: Ivan Baranov

The starter on passenger cars of the Tolyatti Automobile Plant wears out quickly due to poor design of the unit. In case of damage, the owner of the vehicle will be able to remove the ignition switch on a VAZ 2107 independently with a minimum set of tools.

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How to check the ignition switch elements for functionality?

To check functionality you need to perform the following steps:

1. Check the operation of the locking element. To do this, you need to carry out a working cycle of the lock and make sure that the bolt extends when the key is installed at point “III”. When passing against it, the latch tongue should go inward. The rotation of the larva should occur without jamming.
2. Try to remove the key in all positions. A working cylinder allows the key to be removed only at point “III”.
3. Make a small stand that allows you to connect a constant 12 volt power supply to the lock. In fact, you need to connect the lock directly to a battery or other power source.
4. Place the key in position “0” and check the presence of power at terminals 30 and 30/1. Testing is performed with a multimeter or test light.
5. Turn the key to point “I”. Check the presence of voltage in sections of circuits 30/1NT, as well as 30/1-15.
6. In the next position “II” the 30/50 chain is additionally ringed. The key must be held in this position as it returns under the force of the spring.
7. At point “III” the power supply to circuits 30/1NT and 30/1 is controlled.

When is it necessary to replace the ignition switch in a car?

You have to change the lock on a VAZ 2107 in the following cases:

1. Sticking of the key bit when installing into the cylinder or when turning. A number of owners delay the replacement by making a new key and washing the lock with WD-40.
2. Anti-theft rod jamming in any position.
3. If it is impossible to turn on the starter or other electrical circuits. The cause of the malfunction is a broken or burnt contact part of the wire.

Steering lock testing

If you don't check the steering lock, you may encounter certain problems in the future. Therefore, do not waste your time on this event. It consists of removing the key from the ignition and turning the steering wheel at a slight angle.

1. If there is no lock, you will need to slightly adjust the position of the lock. Make sure it fits into the groove located on the steering shaft.
2. If the locking is effective, you will only need to tighten the four installed breakaway bolts until they stop. Twist until the heads break.

When the lock installation is completed and the test has passed, do not forget to connect the device to power and start the engine. If it starts, all systems dependent on the ignition switch are working, you can fully begin reassembly. Follow the reverse instructions for removing the casing and steering column switches. It would not be amiss to check the condition of certain nodes along the way. It is quite possible that some of them also need replacement or a little preventive maintenance.

Wiring diagram for the ignition switch in a VAZ-2107 by wire color

The purpose of the wires in the carburetor lock is shown in the table:

Wiring installation is shown in the photo:

Connection diagram for VAZ 2107 carburetor lock

On the injection VAZ 2107, pink and black insulation is used for the 1NT contact. Instead of separate wires, a plastic plug is used that fits onto the lock pins.

Wiring diagram for VAZ 2107 injector lock

What is this node?

This device is almost identical in design, with the exception of a few small elements, for all early releases of VAZ models. The castle consists of two parts independent from each other. This is the lock itself, which turns on and off all car systems, and the contact group, which performs these switches. The independence of these parts of the device allows, if one of them fails, to replace only the failed one.

To remove and replace this unit, you do not need to purchase any special tools or accessories. It is enough to have at your disposal a set of flat and Phillips screwdrivers, and you will also need pliers. You also need your hands to grow from “that place” and a clear head to figure out what, where and how to unscrew or pull out.

How to replace the ignition switch on VAZ-2107 models with a carburetor and injector?

Replacing the ignition switch on a VAZ 2107 carburetor and injection car is identical.

The ignition switch diagram indicating the components is shown in the photo:

Node design

The ignition switch includes:

1. Steering shaft blocking element.
2. Case detail.
3. Mating part for installing a leash from the larva.
4. Contact group disk.
5. Bushing of the contact part.
6. External part with pins for connection. The letter “a” indicates a signal protrusion used for correct installation of the contact group.

Removing the ignition switch

Removal is carried out in the following steps:

1. Turn off the power supply to the vehicle's on-board network by removing the battery terminal.
2. Place the key in the hole and turn it to position “0” (the head is horizontal).
3. Unscrew the fixing points of the plastic steering column cover. The halves of the casing are connected to each other and the dashboard using five screws.
4. Unscrew the two screws securing the lock body. The attachment points are located on the sides of the body.
5. Press the retainer through the hole in the housing. To do this, use a long thin awl or screwdriver. Having pressed the latch, pull the lock out from its normal place towards you.
6. Disconnect the plug or individual wires from the lock. Next, you can begin installing a new part or further replacing contacts in the old lock.

Before removing the wiring from the ignition switch of the VAZ 2107, it is recommended to make sure that standard insulation is used. This must be done because wires can be replaced during electrical equipment repairs.

Photo gallery

Disconnecting wiring

Unscrewing the left screw

Unscrewing the right lock

Recessing the latch with a screwdriver

Checking and replacing the contact group

To change the contacts in the lock you need to:

1. Remove the spring ring that secures the group in the lock body. The ring is pryed off with a thin screwdriver.
2. Remove the contacts from the lock.
3. Install a new group. When connecting, it is necessary to ensure that the groove made on the contact group coincides with the rotating rod on the secret part of the lock. The body of the contact part should fit into the slot of the body with its protrusion.

When replacing contacts, take into account the number of pins on the part. The spare parts supplied have six wiring connection points. Until 1986, a group with seven contacts was installed on VAZ 2107 cars. Instead of one pin 15, 15/1 and an additional 15/2 are used. To connect a new lock to such a car, you need to connect wires 15/1 and 15/2 into one branch.

Installation and connection of a new lock

Installation of a new or repaired lock is carried out in the following sequence:

1. Insert the key into position “0”.
2. Press in the locking latch and insert the part into the guide housing.
3. Install the wires using connectors or a standard plug (the connection is made in accordance with the color of the insulation).
4. Reinstall the mounting screws.
5. Install the protective cover.
6. Place the terminal on the battery and test the operation of the device.

When connecting the ignition switch to a VAZ 2107, you must strictly follow the electrical diagram. An incorrect connection will result in a short circuit and damage to the electrical equipment.

Installing a new device

Now you can finally proceed directly to replacing the broken or worn out ignition switch on your VAZ2114 car.

To do this, follow the following sequence of actions:

• Insert the key into the new lock and turn it to the first position. This will allow the latch, which is responsible for locking the steering shaft, to hide inside the housing structure;
• Insert the lock into place following the reverse dismantling sequence;
• Install the four retaining bolts and tighten them slightly.

How to remove the ignition switch on a VAZ-2107 if it is locked?

There may be cases when the ignition switch jams and the cylinder cannot be turned either by hand or with a tool. It is possible for the key to break when part of the bit remains inside the well. In both cases, the owner needs to remove the device from the car.

First dismantling option:

1. Remove the steering wheel from the shaft. The steering wheel is secured with a 24 mm wrench nut, which should not be unscrewed completely. Removing the steering wheel from the splines is done by supporting the legs and striking the forearms. After removing the part from the splined part of the shaft, the nut is completely unscrewed.
2. Remove the protective plastic steering column cover secured with Phillips screws.
3. Unscrew the screws securing the lock.
4. Press the pressure plate with a thin tool, which will slightly unlock the part. The pressure is applied through the slot on the left side of the lock. Pressing the latch will allow you to slide the lock body towards you.
5. Use a hammer to hit the plate on the right to rotate the lock around its axis. This will guarantee against the retainer coming back.
6. Using a hammer and chisel, break the plate. Apply blows carefully so as not to damage the steering column switch block.
7. After removing the plate, the locking rod installed in the two eyes will become visible. One of the eyes is easily visible through the hole.
8. Break the eyelet with a chisel or flathead screwdriver.
9. Press the plate again through the slot on the left and pull it up. It should move 10-12 mm.
10. Using a hammer, strike the lock body (in the area where the plug is installed) and pull it off the shaft.

Second option:

1. After the latch is recessed through the slot on the left side of the lock, you need to pull the lock out to the maximum distance.
2. On the right side of the lock there is a platform with text and a number. A wedge (screwdriver) is inserted under it.
3. After this, the area with the inscriptions is cut off with an impact screwdriver or chisel.
4. Use a screwdriver to push the lock pin through the hole and remove the lock from the shaft.

The third method is to destroy the castle with a sharp jerk:

1. One person sits in the driver's seat, the second in the passenger seat.
2. It is necessary to sharply jerk the steering wheel at the same time, which will cause the destruction of the clamp.
3. After this, the lock is removed using the usual method. It is worth noting that only late-release locks can be broken with a jerk; products from the USSR era are more difficult to break this way. In addition, there is a risk of damage to the steering components.

There are other methods for removing jammed ignition switches on a VAZ 2107 - cutting the body, turning or drilling the cylinder, and others. The final choice of dismantling method remains with the car owner.

The technique for removing a jammed device is demonstrated in a video from the Region 4253 channel.

Replacing the contact group

In the event that, as a result of diagnostics, a malfunction of the contact group is detected, you will still have to remove the ignition switch, since it will not be possible to get to it in any other way. After removing the element, disassemble it using the following algorithm:

1. Disconnect the connectors with the backlight power wires.
2. Remove the decorative plastic cover by releasing the 4 latches. Work carefully because these clips are easy to break off, and buying a cover separately is quite a task. It is not advisable to change the entire lock because of it.
3. By bending the 2 clamps holding the contact group, remove it from the ignition switch.

The plastic cover can be removed using a screwdriver

Note. You will additionally need a small flat-head screwdriver as a tool to bend the latches.

The contact group is located immediately under the cover

First of all, examine the status of the contacts. If they have darkened (oxidized), then clean the current-carrying surfaces with fine sandpaper P1000. Then put the group in place and, without installing the lock, connect it to the vehicle's on-board electrical system to check its functionality. If unsuccessful, the part must be replaced. The same will have to be done if the contacts are burnt or the group does not work without any external signs of malfunction.

The part is removed after bending two latches

How to replace the ignition switch without a key?

Replacing a lock without the original key follows these steps:

1. Remove the plastic casing.
2. Use a thin screwdriver to pry off the ring with the marked key positions.
3. Remove the ring under which the larva will be located.
4. Drive a screwdriver into the gap between the cylinder and the body to loosen the fastening pin.
5. After the pin falls out, remove the cylinder.
6. A movable element is installed under the cylinder, which is pressed out when the lock is turned with a key. It must be pressed to unlock the shaft.
7. Remove the device from the steering column and replace it with a new one.

Why is it needed?

As soon as cars appeared, there was no ignition key, and the engine was started using a curved element for the engine, which was quite large and stuck in the front or back of the car. Thus, it turned out that the engine was started manually in the literal sense.

Now this function has been inherited by the starter, which turns the internal combustion engine by the flywheel - a large flat disk with teeth. This disc is located between the engine and the clutch.

When starting, the teeth on the flywheel and starter engage, which allows the engine to spin up according to a directed control signal from the ignition switch.

This does not happen without the participation of battery power, of course.

The ignition switch is a device that, when turned on, ensures the supply of electric current from the battery to the traction relay. This is a kind of first push to move the vehicle. Therefore, the ignition switch is an important element, and when it breaks, replacement cannot be avoided, and in order to install a new one, you need to remove the old one.