Every time, getting behind the wheel, the driver sees in front of him many symbols that light up and go out, which serve as the main channel of communication between the car and the person. Among this visual noise, a special place is occupied by indicators responsible for external lighting equipment, because traffic safety at night directly depends on their correct operation. Understanding what exactly designation on the panel corresponds to the light being on, is a basic skill necessary for every car enthusiast, regardless of driving experience.
Modern cars are equipped with complex lighting systems, including not only standard low and high beams, but also fog lights, daytime running lights, as well as adaptive light beam turning systems. All these modes should be displayed on the dashboard with corresponding icons, the color of which (green, blue or yellow) conveys important information about the status of the system. Ignoring these signals can lead not only to a fine from traffic police inspectors, but also to the creation of an emergency situation on the road due to poor visibility.
In this article, we will analyze in detail all existing icon options, learn to distinguish similar symbols, and understand why the lighting of some indicators requires an immediate response. You will learn how to use it correctly Menu → Settings → Light in modern digital interfaces for setting modes, and what to do if the system reports an error in the lighting circuit.
Basic headlight indicators
The basis of any lighting system is the head light, which is divided into near and far operating modes. Low beam is the main operating mode in urban conditions and on the highway in the presence of oncoming traffic. On the dashboard it is most often indicated by a green symbol depicting a headlight with beams directed downward at an angle. It is noteworthy that in many modern models cars, especially those equipped with an automatic light switching system, this indicator may not light up at all, since the presence of lighting of the headlights themselves indicates the serviceability of the circuit.
Has a completely different meaning high beam, which allows you to illuminate the road at a considerable distance in front of the vehicle. Its activation is always accompanied by the lighting of a blue indicator with a headlight image and straight horizontal beams. This color was not chosen by chance: the blue signal requires increased attention from the driver and reminds the driver to switch to low beam when other road users appear ahead. Forgetting to turn off your high beams means blinding an oncoming driver, which can have fatal consequences.
⚠️ Attention: If the blue high beam light stays on even though you have moved the lever under the steering wheel, there may be a stuck contact in the steering column switch or a fault in the body electric control unit.
It is important to distinguish between operating modes, since incorrect use of lighting devices violates Traffic rules. In some cars, such as older models Volkswagen or BMW, the display can be duplicated on the center console or in the head-up display. If you do not see the usual green icon when the headlights are on, check the integrity of the lamps and fuses, since the absence of an indication sometimes indicates a burnt-out filament.
If you often forget to turn off your high beams, set up an audible reminder in the on-board computer menu, if your car model supports such a function.
Fog lights and specific modes
Deserves special attention fog lights (PTF), which have unique markings on the dashboard. The front PTFs are indicated by a green symbol, where the rays of light are directed downward and intersected by a wavy vertical line. This “wave” symbolizes the fog that this type of lighting is designed to overcome. Rear fog lights, which shine bright red and are intended to identify the vehicle in extremely low visibility conditions, have a similar icon but with the beams pointing to the right and are often orange or yellow in color.
Confusion between front and rear fog lights is a common mistake for newbies. Turning on the rear PTFs in clear weather can irritate drivers following behind due to the high brightness of the lights. Therefore designation on the panel The rear lights are made in a more noticeable color so that the driver clearly understands that this particular powerful light source is activated. They are usually controlled on a separate ring on the light switch or on a button with a characteristic icon.
- 🌫️ Front PTF: green, beams down, wavy line crosses the beams.
- 🔴 Rear PTF: yellow or orange, rays to the right, wavy line to the right of the rays.
- 💡 Side lights: two green light symbols pointing in different directions.
Modern systems can automatically turn on the PTF when activating the wipers at night, if in the menu Settings → Light → Auto PTF mode the corresponding checkbox is checked. However, you should not rely only on automation: in thick fog or a snowstorm, the driver must independently control the operation of the lighting devices, relying on the readings of the dashboard.
Daytime running lights and their indication
With the advent of mandatory daytime running lights (DRL) on new cars a new category of indicators has emerged. DRLs are designed to improve the visibility of the vehicle during daylight hours and are not intended to illuminate the road in the dark. On the dashboard they are often indicated by a green headlight symbol with beams pointing downwards, within which may be the letter "D" (Daylight) or simply an arrow pointing downwards. In some car brandssuch as Audi or Skoda, when only the DRL is operating, the main indicator of the dimensions may not light up, which sometimes confuses inexperienced drivers.
It is important to understand that DRLs do not replace low beams at night. If you only see the “green headlight with a down arrow” symbol on the panel and it is dark outside, you must manually turn on the main light. In vehicles with the system Light Assist or “Light automatic”, the transition from DRL to low beam occurs automatically when the light level decreases or the wipers are turned on, but control over this process remains with the driver.
⚠️ Attention: Lack of indication of DRL activation on some models (for example, in basic configurations Lada or Renault) is normal if the lamps are on. The absence of a separate icon does not indicate a malfunction.
Some drivers try to use DRLs as a full-fledged light, which leads to rapid burnout of LED modules that are not designed to operate at full power 24 hours a day. Make sure that the operating mode corresponds to the time of day and weather conditions.
Adaptive lighting systems and errors
Complex lighting systems such as AFS (Adaptive Front-lighting System) or matrix LED headlights have their own self-diagnosis system. If a yellow or orange headlight indicator with an exclamation mark inside or next to it lights up on the panel, this indicates a malfunction. This could be a burnt-out lamp, an error in the control unit, a problem with the tilt angle corrector, or dirty lenses (relevant for xenon and LED with washers).
When such a signal appears, the system often goes into emergency mode, fixing the headlights in one position or reducing the brightness. Ignoring this warning may result in you being left without adequate lighting at night. In modern cars With digital instruments, the error message is duplicated by a text message in the center of the screen, for example: “Left low beam lamp defective.”
Why is the light indicator blinking?
Frequent blinking of the lamp indicator often indicates that an LED lamp is installed in the circuit without an appropriate decoy resistor. The on-board computer thinks that the lamp has burned out due to the difference in resistance and reports an error.
To diagnose the problem, you can use the on-board computer menu. Find a section Vehicle Status → Light Status, where the system will indicate the specific faulty zone. If you do not have the skills to work with electrical equipment, it is better to contact a service center, since modern headlights require calibration after replacement.
Table of decoding of basic symbols
For ease of perception of information, we will collect the main panel markings, related to light, into a single summary table. This will help you quickly navigate if questions arise while operating the car.
| Symbol/Color | Title | Meaning | Actions |
|---|---|---|---|
| Green headlight, beams down | Low beam | Main light on | Movement is allowed |
| Blue headlight, straight beams | High beam | Enhanced lighting | Turn off when oncoming |
| Green headlight, rays + wave | Front PTF | Front fog lights | Use in fog/snow |
| Orange headlight, beams to the right | Rear PTF | Rear fog lights | Turn off in clear weather |
| Yellow headlight with "!" | Error of light | System malfunction | Check lamps and fuses |
Having this table at hand or in memory will help avoid confusion when controlling lighting devices. Remember that the colors of the indicators are standardized: green - the system is working normally, yellow/orange - warning or malfunction, blue - active high beam mode.
Remember the main rule: the green color of the indicator means “you can go”, yellow requires “checking”, and blue reminds “don’t blind others”.
Light control via menu and settings
In modern cars, light control has gone beyond a simple rotary switch. The driver has access to advanced settings via the on-board computer. For example, in the menu Settings → Light → Ambient Lighting you can configure the delay for turning off the lights (“Walk me home”), the sensitivity of the light sensor or the activation of the threshold illumination. All changes are confirmed by the corresponding icons on the display.
It is important to be careful when configuring settings. Incorrectly calibrating the headlight angle through the menu can result in you shining into the sky or, conversely, into the asphalt in front of the bumper. Correctly adjusting the angle of inclination often requires special equipment and a level surface, so it is better to entrust this procedure to the service center specialists.