Why does the backlight on the instrument panel of the VAZ 2109 not light up?

Today I would like to share my personal experience with minor modifications to the dashboard.

I think many owners of nines of the VAZ family are familiar with the problem of insufficient brightness of the standard instrument panel lighting. Personally, the panel in my car also spoiled my nerves by constantly losing contact in the flexible backlight board.

The modification method is quite simple and requires a minimum of investment.

So, what was required for modification: 1. 1/4 meter of LED strip (in my case it is SMD3528); 2. two pieces of wire 10 - 15 cm long (preferably multi-colored); 3. soldering iron (and the ability to work with it); 4. a small amount of any glue (PVA and silicate are not advisable); 5. skill and patience:)

First of all, we dismantle the panel. On top it has a lampshade, into which standard lighting bulbs are inserted, connected by a flexible board. The flexible board, in turn, is screwed with two screws to the board on the back side. We take out the light bulbs and leave them until better times, take out the flexible board, having first unscrewed the contact screws, and throw it in the trash.

The lampshade itself is point-fused to the panel body. We carefully pry it away from the body, trying not to break it, we will need it later. There is a diffuser glass under the lampshade; we leave it in place, otherwise only part of the panel will be illuminated.

We take the LED strip and solder the + and - wires to it. Glue the tape in the center of the lampshade on the inside. Glue it right in the center! Otherwise, the illumination will be uneven at the top and bottom of the panel. The tape has a self-adhesive base, but personally, to be safe, I added a couple more drops of superglue. We take the wires out through one of the holes from the former standard light bulbs. It would be a good idea to seal the remaining holes with something to prevent dust from getting inside the lampshade. I just covered them with regular electrical tape.

We return the lampshade to its place and glue it with glue. I used “liquid nails” - drop by drop onto the former fasteners. You can use a glue gun.

Next, we solder the wires to the board (do not confuse plus and minus - THIS IS IMPORTANT, unlike standard lamps). The negative is on the same track where the wire from the negative terminal of the tachometer is soldered. You can, of course, fasten the wires to the tracks with standard screws, but here you need to take into account two points: firstly, the connection is not as reliable as with soldering, and secondly, they burst when tightened (they were too weak, or there is strength - no need for brains :).

Types of panels

Instrument panels on the VAZ 2109 are of at least three types:

  1. Low panel;
  2. High panel;
  3. Electronic panel on nines with Europanel.

On versions with a low panel, failure of the entire panel is extremely rare. This is due to the fact that here the speedometer and econometer are equipped with mechanical drives. Therefore, it is unlikely that they will fail along with the electrical component.

general information

VAZ 2109 electrical faults

Let's start with general information. You should know that the VAZ 2109 has two power sources - the battery and the generator. The battery is designed to supply current when starting the power unit of a car, as well as to power the starter and other 12 V consumers when the engine is not running. When the engine starts, all the “initiative” goes to the generator. Now this element provides current to all consumers, even the ignition system and battery.

Why doesn't it light up?

  • First, remove the cover of the mounting block and make sure that the fuse is intact. The fuse markings are located on the inner surface of the cover. You should look for fuse F16 or F5, depending on the year of manufacture of your VAZ 2109.
  • If the fuse is intact, be sure to check whether the contacts of the fuse you are looking for have not oxidized. It is not uncommon for shields to fail due to broken contact.
  • Check if there is power to the dashboard. To do this, you will need a warning light and the ignition on. Disconnect connector X4 in the mounting block and check for voltage at pin 3. The disadvantage of the VAZ 2109 design is that when it rains, the mounting block immediately becomes wet. This causes oxidation of the contacts in the pads, which causes the electrics to stop working. Sometimes not only the contact is oxidized, but also the board of the Nine mounting block.

If none of the above actions yielded results, you will have to be disappointed. After all, now you need to remove the dashboard and check the condition of the wiring, contacts, and negative connections. Here it is better to trust a professional electrician or set aside a whole day to troubleshoot problems yourself. There is no need to rush here.

Features of backlight replacement

How to change the panel, making it a designer one? You need to be extremely careful and precise when removing and disassembling the dashboard, so as not to subsequently disturb the correctness of its readings. Often, during disassembly, the chrome plating of parts suffers. So be patient and get to work.

First, remove the dashboard panel. You can read about how to change it in the repair instructions for your car brand. Then remove the instrument cluster, disconnect the plugs, bend the speedometer cable and replace the bulbs. Gradually remove the filters from the buttons. It is better to leave the green-blue light spectrum on the panel unchanged, but replace the green filters completely.

You can make the rear window heating button illuminated orange, and the fog lamp button illuminated turquoise. This shade can be achieved by passing the white color of the LED through a green filter. The reflector can be foil secured with double-sided tape. The hazard warning lights should be red (like in foreign cars). In this case, maintaining polarity is of particular importance.

In a ring filter, using a file, you can make triangular slits through which the light will be scattered. The overall illumination pattern will become more uniform. It's time to check the performance of the LEDs. Only after this check can a constant voltage of 12 V be supplied.

Instrument needles are often replaced with special ones with backlight. This effect is achieved by a lamp located near the axis. Every driver who has basic knowledge of car mechanics and puts in a little effort can boast of a beautiful dashboard. Improve the design of the VAZ 2109 and enjoy it!

When the instrument panel on a VAZ 2109 does not light up, this is one of the common malfunctions of this unit. To fix a problem, you first have to find the cause of its occurrence.

Popular faults

If we talk about the dashboard of VAZ 2109 cars, then they are characterized by certain problems. We will tell you about them, and also tell you how to act correctly in a given situation.

Fault typeYour actions
Gasoline level and temperature indicator does not workIn most percent of cases, this situation occurs due to breakdown of devices, sensors of these devices, or an open circuit of the power supply. Therefore, first check the circuit for continuity, make sure that the fuses have not blown. If this is not the case, check whether the gas level and temperature sensors are working. Only if none of the actions allowed you to get rid of the breakdown, you can begin to replace the devices themselves. No options, the problem lies in them
When the fuel tank is full, the arrow points to zeroIf you have worked on the fuel level sensor, the fault most likely lies with you. When manipulating this device, the float limiter is often knocked down. Either the limiter is installed incorrectly or adjusted, causing the resistor winding to end. To resolve the problem, remove the sensor and then adjust the limiter again
The fuel gauge needle regularly jumps and ends up at zeroHere, most likely, the resistor has weak contact with the current collector. Another possible option is that there is a break in the resistor. To resolve this situation, we recommend replacing the hot level sensor with a new measuring device
The fuel level lamp is constantly onIf this lamp is constantly on, there is probably a short circuit in the fuel level sensor supply wiring to ground. Another option is that the sensor’s flexible bus is shorted to the fuel intake pipe. You will have to disassemble the device to align the bus and get rid of the resulting short circuit
Indicator lamps do not work on the dashboardThere is a high probability that the light bulbs have simply burned out, or they are poorly held in their seats due to loose contact. Replace the bulbs, but first try tightening the contacts. Traces of oxidation may be detected. When cleaned, the light bulbs can work normally again. Also, do not exclude the possibility of wiring breakage or oxidation of the tips of the supply wiring. Try going over the wires with a tester, cleaning the contacts if necessary.
The speedometer does not work, the flexible shaft is noisyIn such a situation, you will have to change the speedometer drive cable or replace the entire speedometer assembly. But before you bother so much, check that the fastening nuts of the tips are tightened correctly and properly. The flexible shaft may make noise during operation due to deformation or violation of the permissible bending of the shell of less than 10 centimeters during installation

The instrument panel of the VAZ 2109 is not so complicated that you cannot figure it out on your own. But in the absence of experience, it is better to entrust the repair to specialists, or to enlist the support of a partner who understands this matter.

Didn't find the information you are looking for? on our forum.

Video “Instructions for replacing the speedometer cable on a VAZ 2109”

How to repair the speedometer on a “nine” if it stops working - visual instructions for replacing the cable at home are given in the video below (the author of the video is Vladimir Edwin).

The backlighting of the VAZ 2109 instrument panel is often not satisfactory for drivers. You can change the color and its brightness yourself, without turning to the salon for help.

To improve the lighting, you need to install LEDs instead of conventional incandescent light bulbs. Their glow is much brighter, in addition, you can choose the color of the backlight at your discretion: blue, green, red or white. These are the main colors, but if you look, you can also find purple LEDs.

Replacement of light bulbs or sockets must be carried out carefully and carefully. If the car owner decides to use LEDs to illuminate the buttons, then you need to purchase a light bulb with a regular base. Soldering and a special cartridge are needed if there is a desire to replace the backlight of the instrument cluster. Among the many LEDs, there are also those that have a diffuse or, conversely, point glow.

These effects are achieved using a focusing lens configuration. A more uniform backlight is suitable for illuminating the scale on the instrument panel, and a brighter light is suitable for the button icon. Every driver should take into account the features of design changes when improving his car.

Messages 11

1 Topic by Andrey08 2009-12-16 13:01:12

  • Andrey08
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Topic: Not Working: All Tidy, Wipers, Fern Guard on VAZ 21099

My friend has a VAZ 21099 injector.

And recently the following happened: all the instrumentation stopped working (speedometer, tachometer, etc.), the wipers and ferns do not work. the headlights seem to come on

Today I talked to him, they say in the morning everything worked fine, but in the afternoon it immediately turned off right on the go.

I advised him to pay attention to the fuse box (they say the frost has hit, condensation is forming or it’s just wet)

I would like to hear your opinion, what do you think about this? mb has this happened to anyone?

2 Reply from maik 2009-12-16 19:38:20

  • maik
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Re: Not working: All tidy, wipers, fern on VAZ 21099

My friend has a VAZ 21099 injector.

And recently the following happened: all the instrumentation stopped working (speedometer, tachometer, etc.), the wipers and ferns do not work. the headlights seem to come on

Today I talked to him, they say in the morning everything worked fine, but in the afternoon it immediately turned off right on the go.

I advised him to pay attention to the fuse box (they say the frost has hit, condensation is forming or it’s just wet)

I would like to hear your opinion, what do you think about this? mb has this happened to anyone?

You can also check the ground on the tidy. (mass is strength))) all troubles come from it.

3 Reply from ils 2009-12-17 06:58:25

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Re: Not working: All tidy, wipers, fern on VAZ 21099

I agree with maik - most likely the mass has moved away. It is attached under the dashboard above the place where the steering shaft is screwed to the body. The second place is the ignition switch relay. I’ve seen two types of such relays - some have a tongue that needs to be screwed to the body (there is one in the engine compartment - it looks like a starter relay), the second has a black wire - it should go somewhere to the body. I checked it on the pile - as soon as the mass disappeared from this relay, the entire tidy died, the wipers also did not work.

4 Reply from SokolOFF 2009-12-17 08:38:33 (2009-12-17 08:42:23 edited by SokolOFF)

  • SokolOFF
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Re: Not working: All tidy, wipers, fern on VAZ 21099

Judging by the quantity of everything at once, I dare to guess:

- ignition switch contact group

- one of the pads (it seems red) flew out of the block on the passenger compartment side

-a flooded block is also an option

PS I would check in just this order)) Well, first, of course, a visual inspection of the block. As for the mass, IMHO, it’s unlikely. After all, the headlight switch in the same place takes a lot of weight.

By the way, I just remembered another question: are “headlights” HEADLIGHTS (low beam, high beam) or dimensions? And does the car even start? Simply, if the lights are on, but the car does not start, then 90% of the ignition relay is either a contact group (or their wiring). I had such a case.

5 Reply from Andrey08 2009-12-17 09:37:00

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