According to modern traffic rules, the side lights of a car must always be turned on when driving. And if they do not work, then this malfunction must be corrected immediately. And to make it easier for you to do this, we will look at the causes of malfunctions of the side lights on a VAZ 2109 car.
The first and most common reason for the failure of side lights is a burnt out light bulb or poor terminal contact. The solution is to replace the light bulb with a new one and clean the contacts. Lack of contacts is especially common on rear lights, since contact between the light bulb and the board is lost there.
Sometimes tapping on the headlight is enough to make it light up. Also, the location of the rear lights is not very good; water and dust get in there, which leads to rapid failure of the board.
The second reason is, of course, the fuse. Or rather, on the nine, two fuses are responsible for the dimensions. The size fuse F10 (7.5A) is responsible for the front and left rear markers; it also contains the instrument cluster lighting, panel lighting, license plate and cigarette lighter.
So if the dimensions fail, you can see if the lighting works, as indicated above, to understand whether the fuse is really the culprit.
Fuse F11 (7.5A) is responsible only for the rear right marker. In order to change the fuse, you will have to open the hood and the cover of the mounting block and, if necessary, replace the fuse with exactly the same one.
The third reason for the malfunction of the dimensions on the VAZ 2109 car is the K4 lamp serviceability relay, sometimes jumpers are installed instead of this relay, perhaps the old owners installed it better to replace it with a relay.
The fourth reason is the headlight and side light switch itself. Perhaps the contact has come loose or the button has already outlived its usefulness; most likely, it will have to be replaced with a new one.
The fifth reason is the mounting block itself. As you already know, it is located in a bad place, and if the drain holes become dirty, water will flow into it and onto the plug contacts, which leads to oxidation and failure of the car’s electrical devices.
You will have to remove the fuse box and clean the contacts. Therefore, you need to keep the drainage holes clean.
And the sixth reason is the wiring itself, since most of the nines are already old and worn out by time, respectively, and the wiring, or rather the insulation of the wiring, is no longer the same. There may be a short circuit somewhere or a break will appear.
You need to pay special attention to the wires that go to the rear lights, as there are places where the wires bend. Logically, when the wires are shorted, the fuses should constantly blow and it is worth paying special attention to this!!!
The “dimensions” do not light up on the VAZ 2108, 2109, 21099
Let's look at how to quickly find the reason for the failure of the "dimensions" on VAZ 2108, 2109, 21099 cars. The side lights are part of the vehicle's external lighting system and its operation with non-functioning "dimensions" is difficult, especially at night. We are looking for the reason for the non-functioning dimensions, as is customary in such situations, from simple to complex.
Causes of the malfunction “the dimensions of the VAZ 2108, 2109, 21099 do not light up”
— The side light bulb in the socket has burned out
One light bulb, or several at once, can suddenly burn out. In some cases, it may be impossible to visually identify a burnt-out light bulb. Therefore, we replace the burnt out one with a known good one. You can use a similar one from a nearby headlight.
— The contacts in the side light bulb socket have oxidized
We rotate the light bulb in the socket several times to remove the oxidized layer and restore contact. In the future, you can clean everything with sandpaper.
— The contacts in the connecting blocks of the headlight or tail light unit have oxidized
We remove and put on the connecting blocks several times to remove the oxidized layer and restore contact. More radically, we remove the pads and clean the contacts.
- No “mass”
The “negative” wires of the front headlights and rear lights with side lights on VAZ 2108, 2109, 21099 cars are attached to the car body. It is necessary to clean the mounting location to ensure good contact with ground. Usually the negative wire is the black wire from the headlight connection block, attached to the body next to the headlight or taillight.
Weight of the front headlight, place of attachment to the body of the VAZ 2108, 2109, 21099
— The fuse has blown
If fuse 10 (F11) is blown, the side lights of the right headlight and right rear light will not work. If fuse 9 (F10) is blown, the left headlight and left rear light of the vehicle will not work. We replace them with new ones, and then look for the cause of the burnout (possibly a short circuit somewhere).
— Relay K4 is faulty (monitoring the health of the lamps)
A faulty K4 lamp control relay can be replaced with jumpers. We connect the holes for relay terminals 1-7-8, 9-10-11, 4-5. On some VAZ 2108, 2109, 21099 vehicles, jumpers are already installed instead of lamp health monitoring relays.
— The tracks in the rear light boards have crumbled
Visually inspect the tracks in the rear light circuit boards for shedding, rust, or burnout. If necessary, we check their integrity using a test lamp or tester. A faulty track can be repaired by soldering wire onto its frayed edges.
— The pads in the mounting block have come off or the wire tips in them have oxidized
It is necessary to check the secure fit of the connecting blocks in the fuse mounting block. For an electrical circuit of “dimensions” these are plugs Ш4 (Х4), Ш6 (Х6), Ш9 (Х9), Ш11 (х11). If necessary, the wire tips present in them should be cleaned from oxidation.
— The external lighting switch on the instrument panel is faulty
You should remove the exterior lighting switch and connect the black and yellow-red wires together. The black current flows into the switch, and the yellow-red current flows out. If the lights light up, replace the switch with a new one. If not, we look for a fault in the electrical circuit further.
"Outer light switch"
— “Open” or short circuit in the wiring
It is necessary to check the presence of electric current on the external lighting switch (circuit from the ignition switch to the switch), fuses (circuit switch - mounting block) and on the lamp control relay (functionality of the mounting block).
See “Electrical connection diagrams for turning on side lights (exterior lighting) on VAZ 2108, 2109, 21099”,
"How to find a break in a car's electrical wiring."
Notes and additions
— Side light lamps are located in the front headlights and rear lights of the car. The front lights use an A12-4-1 bulb, and the rear lights use an A12-5 bulb.
— The electrical circuit for switching on the external lighting (“dimensions”) is the same for all these cars. The only difference is in the fuse mounting blocks used: on old Samaras, before 1999. this is 17.3722 with finger fuses, on cars after 1999. modifications of the mounting block 2114 with flag fuses. Accordingly, fuses 9 and 10 are used in the external lighting circuit with the old mounting block, with the new F10, F11.
— “Dimensions” of the right side of VAZ 2108, 2109, 21099 cars on the 10th (F11) fuse. “Dimensions” of the left side on the 9th (F10) fuse.
— Simultaneously with the side lamps, the rear license plate lights turn on. Here is their connection diagram “Rear license plate illumination VAZ 2108, 2109 connection diagram.”
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More articles on electrical VAZ 2108, 2109, 21099
— Electrical connection diagram for the reversing light on VAZ 2108, 2109, 21099 cars
— Electrical connection diagram for brake lights and parking brake of VAZ 2108, 2109, 21099 cars
— The reverse light does not light up on VAZ 2108, 2109, 21099 cars
— Contacts of steering column switches on VAZ 2108, 2109, 21099 cars
— Turn indicators do not work on VAZ 2108, 2109, 21099 cars
— How to remove the headlight of VAZ 2108, 2109, 21099
Removing and replacing rear lights
- It is best to make the replacement before wiring problems begin.
- To work you need to remove the lights. On the VAZ 21099 it is hidden by a plastic decorative trim in the trunk.
- Now unscrew the fixing screws on the trim and remove them.
- Disconnect the block with wires and carefully remove it, being careful not to damage the board, because it sits tightly in place.
- Now, using a 10mm wrench, unscrew the 4 nuts securing the headlight housing. Remove the part from the machine. Now you can install the new part and calmly begin the replacement.
- The collection is done in reverse order (the author of the video is Automaniac1994).
Unlike the vast majority of imported cars (thanks to our designers), you can replace the light bulbs in the rear light in a minute and literally with your bare hands. No removal of wheels, bumpers or engine.
Open the trunk, find the cover covering the back of the lamp, and remove it
Disconnect the power supply from the flexible board (extremely carefully!). We discussed in detail how to do this above.
Now you need to remove the back panel of the lamp. To do this, on the side located closer to the central axle of the car, press the plastic lock.
Retainer holding the rear panel in place
Carefully remove the panel, starting from the side of the latch.
Removing the panel
Place it face up. Before us are five different-sized light bulbs. We need the smallest one - the one marked with an arrow.
Rear light panel of VAZ 2109 from the lamp side
We recess it a little, turn it counterclockwise and take it out. We install a new one in place of the burnt one, fixing it by pressing and turning clockwise. We connect the power supply and turn on the dimensions. Everything is working. Place the panel in place and close the lid.
Types of panels
Instrument panels on the VAZ 2109 are of at least three types:
- Low panel;
- High panel;
- 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.
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 type | Your actions |
| Gasoline level and temperature indicator does not work | In 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 zero | If 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 zero | Here, 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 on | If 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 dashboard | There 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 noisy | In 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.
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