What to do if one low-beam headlight stopped working on a VAZ 2109. In principle, there is nothing wrong with that, you can drive with one working headlight. It's just that there is a possibility that the second headlight will also stop working, and then driving on the VAZ 2109 in the dark will be impossible. Therefore, as soon as possible, it is necessary to figure out why the low-beam headlight of the VAZ 2109 does not work.
The reasons why the dipped beam headlight does not shine or the dipped beam does not work at all in the VAZ 2109:
1) The low beam bulb is burnt out
2) Blown fuse in the mounting block
3) Bad contact of the fuse in the mounting block
4) The low beam relay is faulty
5) Faulty switch and wires.
1) If your low beam headlight on a VAZ 2109 stopped working, do not rush to go to a car shop for a new one. The reason may not be the light bulb at all. A new light bulb costs an average of $ 3-5, so it's best not to waste this money.
It is necessary to get the light bulb out of the headlight and check its serviceability. Open the hood of the VAZ 2109, unscrew the protective glass of the headlight and take out the light bulb.
We check the integrity of the spiral of the light bulb visually. You can also simply apply voltage to the light bulb and check whether it will glow or not.
If the bulb is defective, it must be replaced.
2) The fuse in the VAZ 2109 mounting block has blown.
As a rule, fuses do not simply burn out. If the fuse is blown, then more than the permitted electric current flowed through it.
We take out the blown fuse and insert a new one of exactly the same rating. If it also burns out, it means that there is a short circuit somewhere in the headlight's electrical circuit, it is necessary to find and fix it.
3) If there is poor contact between the fuse and its socket in the VAZ 2109 mounting block, the headlight will shine dimly, or it will not shine at all. The fuse may melt in this case, since the contact point of the fuse and the socket of the mounting block will warm up. In this case, it is necessary to clean the socket contacts with emery paper and replace the fused fuse.
4) When the dipped beam is turned on in the VAZ 2109 mounting block, a click should be heard - working off the relay
turning on the dipped beam. If, when the light is turned on, a click is not heard and the light does not light, then the relay may be faulty.
5) If the low beam VAZ 2109 is intact, the low beam relay and the whole fuse are working properly, then there is a malfunction in the switch or in the wires from the switch to the mounting block, from the mounting block to the headlight.
