Inoperative window regulators: causes and methods of troubleshooting

01/10/2022 17,551 Electrical package

Author: Ivan Baranov

Electric windows (EP) are one of the vehicle elements that contribute to more comfortable driving. Like any other electrical circuit component, EDs tend to break down periodically. What to do if a car window regulator does not work and for what reasons these components break - read below.

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Components of the window lift system

What should I do if the right one does not work or both electronic devices fail? The window regulators may break, leaving them unable to lower or raise the windows. It is possible that the electronic device is jamming or sticking, but before you repair and disassemble the system yourself, you need to understand its structure. The unit itself works by controlling electric motors installed in the vehicle doors and designed to raise and lower the windows.

The system itself includes the following components:

• electric motors;
• switches located in the doors;
• wiring;
• glass

General structure of the ED system

Button

Another reason why the power windows on a VAZ 2114 do not work may be the control button. Inside it there is contact between the plates, the strength of which deteriorates over time. As a result of this, it completely disappears, and the button stops responding to pressing.

All buttons must be in good condition, as they are connected in series. If one fails, you won't be able to diagnose the problem by removing it from one door and putting it on another. In this case, you will have to purchase a new button and switch them around, identifying which one has stopped working.

The price is within 200 rubles, so carrying out such diagnostics is not that expensive.

Principle of operation

Why do the power windows not work or only the right window does not go up? To understand exactly why the malfunction occurred, it is advisable to familiarize yourself with the operating principle of the unit. Typically, such a system has a trapezoidal design, which allows the windows to be raised and lowered by pressing switches. The buttons themselves can be located in all car door cards or located only in the driver’s door. It is also worth noting that an electric motor is mounted in each door, which operates in two directions.

In addition, each system is equipped with a special relay, the purpose of which is to control the voltage supplied to the electric motors of the structure. Depending on the vehicle, some car models may be equipped with automatic switches that are installed separately for each electric motor. The use of such structural elements makes it possible to ensure normal operation of the entire system if the window regulator is poor on only one door.

A little theory

Electric windows have long been used by car enthusiasts; they have significantly increased the level of comfort in the car. Naturally, like everything else, this innovation was put into practice by foreign manufacturers. The domestic auto industry picked up this idea much later.

Speaking abstractly, in terms of build quality, foreign manufacturers are head and shoulders above the Russian auto industry (however, there are significant differences in prices, service and components).

What does it mean? Everything is very simple

, a connoisseur of Russian cars will have to constantly struggle with minor (and not always minor) problems that arise, such as broken window regulators.

If your car was equipped with power windows with mechanical handles, then the cause of the breakdown is easy to find. Most likely, someone, driver or passenger, exerted extra effort and the mechanism gave way. In this case, it is necessary to disassemble the car door from the inside; I remove all the trim.

If the electric lift does not work, then everything is also quite simple. The door on which a similar problem occurred should be disassembled in a similar way. The mechanism of electric window lifts consists of a non-separable motor, which can simply burn out and require replacement. There is also a cable with a bar coming from it. Before replacing, of course, it is necessary to check whether an electrical signal is received by the motor.

Perhaps the reason lies not in the mechanism itself

, but let’s say, in a faulty button, or in other electrical equipment. It is necessary to check the fuses that are located under the steering wheel on the right (under the cover, read more in the car user manual).

Fuse F5 is usually responsible for power windows. If the fuse is intact, then use a multimeter to measure the voltage at the motor terminals. To do this, you can use a regular 12V light bulb.

No voltage?

It is necessary to carefully check the wiring coming from the motor, inspect the relay and control unit. Very often, auto mechanics have to see problems with the button that controls the window regulator. Don't fix it, if it's the problem, just replace it.

It's not expensive and won't cause headaches in the future. If there is voltage on the motor, but it does not work, most likely the drive brush is stuck. You can solve this problem by pressing the button and turning the motor axis. If the cable breaks, it needs to be completely replaced.

If the fault cannot be identified, we move on to the mechanism relay. In the diagram it is marked with a special icon and is designated K5. Located at the bottom left. To check the functionality of the relay, it is better to replace it with a known working one and see if the mechanism functions.

The relay is responsible for closing the contacts when the ignition switch is turned on, so that there is no additional battery consumption when the car is parked. But over time, it may stop working, which is why even with the ignition on, voltage will not be supplied to the system.

Causes of malfunction

So, we gradually approached the issue of malfunctions. What if the window regulator cannot go down or up? Before you remove the window regulator, disassemble and repair it in your car, let's look at the main reasons. If the rear or front windows do not work, the reason may be either electrical or mechanical.

Detailed design of the EP system

Electrical faults

First of all, if the window regulator has stopped working, it is necessary to diagnose the safety element responsible for the functionality of the system. If you realize that the power window is not working due to a fuse, then you just need to replace it. But if the fuse is working, then you will need to measure the voltage at the electric motor terminals. This task can be accomplished using a regular 12-volt lamp or using a tester.

If you find that the driver's window or any other door does not work due to voltage, then you need to further check:

• wiring;
• relay;
• system control unit.

Sometimes a car owner thinks that the window regulator is broken if, after opening the window, it automatically begins to close until the key is turned in the ignition. As a rule, in this case the problem lies in the contacts, which should be cleaned. Much less often, but it still happens that repair of electric windows includes replacing or repairing a button.

Mechanical defects of the mechanism

If, after measuring the voltage, you realize that there is current in the system, but it does not go down or the window regulator does not work at all, most likely the problem is mechanical. As a rule, in this case, something is interfering with the device, so you will have to disassemble the door and look for the reason. Much less often, the reason lies in a failed electric motor (the author of the video is the channel In Sandro’s Garage).

How to raise the glass if the electric seal is broken - there are several options:

1. Purchase a window regulator repair kit and repair the device, after which you can fully use the system.
2. Try to grab the glass on both sides with your hands and pull it up. If the glass falls after being lifted, you will have to disassemble the door and place a support of the appropriate size under it.
3. If you can’t lift the glass with your hands, you can take a fishing hook on a fishing line and lower it into the door card. You need to try to pry the glass and lift it.

RESULTS

If the window regulator does not work, start by finding the cause of the breakdown, and then proceed to fix the problem. Most often, the malfunction can be fixed independently, without the involvement of specialists. This also applies to situations where it is necessary to remove the window regulator for repair or replacement.

If you find an error, please select a piece of text and press Ctrl+Enter.

During the operation of the car, the window lift mechanism often breaks down. This is mainly due to high production. Initially it fails on the driver's side, since this system is most often used on this door. But if one component breaks down, the power windows on each door of the car may fail. What to do in this case? Let's take a closer look at how to solve the problem when the power windows of a VAZ 2114 do not work.

Troubleshooting video:

Instructions for replacing the electric motor

Repairing a window regulator may include different stages depending on the breakdown. In this case, we will tell you how to repair a window regulator by replacing its electric motor; as mentioned above, this problem is one of the most common.

The replacement process is considered using the example of a Lada Kalina car:

1. First you need to buy a new electric motor, which is sold in a housing with a gearbox. The door trim is dismantled - this operation cannot be performed in the cold, since the trim is fixed using plastic pistons, which will quickly break.
2. Unscrew all screws and other fasteners securing the inner handle.
3. All wires must be disconnected; for greater convenience, you can remove the speakers. After these steps, the glass, which is fixed in the guides, is unscrewed. In order for the glass to sink to the bottom, you need to unscrew four more screws; to do this, use a 10 key. There is a curtain at the bottom of the glass unit, which must be removed.
4. The window regulator itself is mounted on nuts and guides, the electric motor itself is secured with three more nuts. The block can be pulled out through the technological holes in the door. If you disassemble the gearbox, the electric motor will fall apart into two parts. In general, the gearbox must be dismantled and replaced with a new one, further reassembling in the reverse order. The gear cable should be lubricated before use.

1. First remove the door trim.

2. Disconnect all wires.

3. Disconnect the gearbox and replace it with a new one.

The most common reasons why the VAZ-2114 window regulator does not work

There is no point in arguing that power windows significantly increase the operating comfort of a car. But most drivers also know that they cause a lot of trouble. By the way, when it comes to the breakdown of the mechanism, we must not forget that the problem may not be in it, but in the glass itself. Over time, the holder or seals wear out, which often leads to a banal misalignment, which significantly impedes the freedom of movement of the glass.

The design of the window lifting mechanism is quite simple, but not reliable. And the fact that the safety block is placed in a place where moisture and dirt can easily get in is also not a plus. As you know, the slightest wear of the insulation can lead to a short circuit and breakdown of the entire system.

The most common reasons why a window regulator fails are the following:

1. Damage to the components of the control unit.
2. The contacts have oxidized and the circuit has opened.
3. Disconnecting the power supply.
4. The control button has stopped performing its functions.

Yes, most often car enthusiasts are faced with the fact that this component of the window regulator fails.

Tracks or contacts in the mounting block

Another reason may be a broken contact of the mechanism relay in the mounting block.

Considering the circuit of the mounting block, we can conclude that a constant plus comes to pin 30 through a fuse, and when we turn on the ignition, we apply another plus to pin 85. As a result of turning on the ignition, an electromagnetic field appears, which closes pins 30 and 87, which provides power to window lift buttons.

This means that if the operation of the plus on the ignition switch is disrupted, the contacts stop closing, even if the relay is in working condition. You can check this by closing contacts 30 and 87 directly, then the plus will come without the ignition switch and if the problem is in it, then the power windows will work.

The video demonstrates another solution to this problem:

But there may also be the opposite situation, that we do not have a constant positive supply to pin 30, and when we turn the ignition key, the contacts close, but nothing happens. In this case, it is best to ring the contact with a tester and find out whether there is constant voltage. For testing, you can connect the plus directly to pin 87, but this is not safe, since the wire will go outside the fuse.

Where is the door window lift located?

On cars of the Samara 2 family, different types of window lifters are installed, namely, there are electric ones in the front, and mechanical ones in the back (If the car is in a top configuration, then there are electric ones in the back), both types are hidden in the door itself and you won’t see them without removing the trim, so for For clarity, in the photo below, the trim was removed from the front door of the car, and the window regulator itself is indicated by a red arrow in this photo.

The power window raises but does not lower the window

Greetings to all. Help me figure out the problem. The power window raises the window all the way, but does not lower it. I transferred the buttons from a known working lift - everything was the same. I disassembled the door, current flows from the button to the electric motor, and if you press the button up, then the plus comes from one wire, if you press the button down, then the plus comes from the other wire, only 2 wires to the electric motor.

Only a small part remains, in the photo with a blue sticker, it says AR00611, 15M6K. Who can tell me if she is responsible in the engine for making it spin in different directions? If not, where should I dig and what should I check?

Often it's just a matter of the motor. tap a little with a hammer and everything becomes humming, but not for long. the brain brushes are most likely floating. and “+” is changed by the button itself

The motor turns freely (in one direction), everything is lubricated, the brushes are not burnt, and besides, why does it only turn as it should in one direction, and absolutely zero in the other? - obviously not in brushes.

they change places, but in general it is immediately checked directly with the battery: + and - you change places and see how it works

So, how can I measure the minus?)) A plug with two wires, an up button on the left (for example, a plus), a down button on the right, a plus. There should be a minus on the opposite ones at this time, right?

I change places, for example, but it spins only in one direction, is this small part to blame (in the photo with a blue sticker), or does the motor simply spin in different directions due to a change in polarity?

Measure the voltage at the connector removed from the motor. You can just plug in a light bulb.

This is a spark arresting capacitor, it either works or it doesn't. regardless of polarity.

This means that this capacitor protects the brushes from burning, and that’s not the problem. Then fantastic) The mechanics cannot be at fault, I completely disconnected the motor, the gear rotates smoothly freely, but only in one direction.

what car? I think it’s a button or buttons, if there are duplicates

as options, put this engine in place of the working one or take a working button and connect it to this engine

why? + and - with the battery directly and check. then change the polarity and check again

Accent. I took a working button and connected it, everything was the same) I’ll go for a walk and torment the lift motor)

feed directly + and - from the battery to the motor, see how it goes down, maybe it’s hitting the borhotka that’s inside the slide, maybe there’s a bad contact somewhere

Repair

To troubleshoot problems with the wipers on your VAZ 2109, it is not at all necessary to contact a service station. The work can be done with your own hands, saving a decent amount of money.

Repair consists of performing several operations:

• Disassembling the unit;
• Troubleshooting;
• Eliminating the causes of purifier failures;
• Reassembly.

Dismantling

The first step is to learn how to remove windshield wipers. This will give you access to the device and all its components.

It is enough to follow the specified sequence of actions and first familiarize yourself with the wiper diagram in order to do everything correctly.

Scheme

1. First, disconnect the negative terminal of the battery to de-energize the car.
2. Remove the brush arms by moving them to a vertical position and unscrewing the fastening nuts. Unscrew the nuts carefully so as not to push the lever out. Otherwise, under the action of the spring, it will fly into the glass and break it.
3. By unscrewing the fasteners, the levers can be removed. It is not always possible to do this manually, so arm yourself with pliers. Be careful not to damage the threaded area. To avoid this, screw the nut back onto the splines, but not completely.
4. Remove the protective caps made of plastic from the slots on each side.
5. Unscrew the upper mounting nuts with the bracket and remove them. Under them there are rubber washers, which are also dismantled.
6. Lift the hood and disconnect the wiring harness that powers the wiper motor.