What the fog light icon looks like: a complete guide to the symbols

Controlling a car's lights is a skill that must be brought to automaticity, especially in poor visibility conditions. The driver often has to act quickly, by touch or with peripheral vision, to activate the desired lamps. However, not all symbols on the control panel are intuitive, especially for beginners who have just started driving after learning.

In this article, we will look in detail at what the fog light icon looks like, what is the fundamental difference between the front and rear optics, and why the color of the indicator is critical. Understanding these nuances will help you avoid fines and, more importantly, avoid blinding other road users at a critical moment.

Improper use of lights is one of the common causes of accidents in bad weather. Knowing exactly how to designate fog lights (PTF) on your car is a basic safety element. Let's figure out what's hidden behind the icons on the control unit.

Basic pictogram and designation standards

According to international standards adopted in most countries, including Russia, the designation of fog lights is strictly regulated. This is not just an artistic invention of designers, but a unified system designed to make driving understandable, regardless of the make of the car. The main element is a schematic cross-section of the headlight.

This image always contains horizontal lines, symbolizing the light flow. The key difference between PTF and the main light is that these lines are intersected by a vertical line. It is this element that indicates that the light “pierces” the fog, cutting it, and does not reflect from it, as happens with high beams.

It is important to note that the shape of the headlight icon itself may vary. It can be round, oval or square, but the essence remains the same: the rays are directed downward and crossed out. PTF symbol is always static and does not blink when turned on, unlike the direction indicators.

• 🔦 Main headlight: schematic semicircle on the left.
• 💡 Light rays: horizontal lines directed to the right.
• ✂️ Vertical line: crosses out the rays, indicating anti-fog mode.
• 🟢 Green color: standard indicator of front PTF operation.

⚠️ Warning: Never rely solely on the color of the light bulb on the button. In some budget car models, the display may be incorrect or replaced by the previous owner. Always check the symbol on the switch itself.

Differences in design may concern not only the shape, but also the location of the symbol on the control unit. In modern cars with digital instrument panels, the icon may only appear on the display when activated. In older models such as classic VAZ or early Ford, the symbol is applied directly to the turn signal button or handle.

Knowing the standards allows you to instantly navigate a rented car or when changing to another model. Unification of notations created precisely so that the driver does not waste time searching for the right button in the dark, when every second of delay can cost safety.

Front fog lights: green indicator

The most common question concerns the color of the indicator. Many drivers mistakenly believe that the color of the icon on the instrument panel depends on the color of the glass of the headlight itself. This is a misconception. It lights up on the dashboard green indicator, if we are talking about front fog lights.

Green color in car displays traditionally means “allowed”, “on” or “safe”. When you turn the switch and see a burning green icon with crossed out rays, this is a signal that the power circuit of the front PTF switches and lamps are on. It works the same on both Toyota, and on Lada.

It is worth remembering that front fog lights often only work when the side lights or low beam are on. This is implemented at the electrical circuit level to prevent battery drain when the light is forgotten. If the green icon does not light up, check to see if the lights are on.

In some premium cars, such as certain models BMW or Mercedes-Benz, instead of a separate icon on the dashboard, the power button itself can be illuminated. In this case, you must carefully look at the symbol printed on the control to make sure that it is the front circuit that is activated.

Activating the front PTFs significantly improves lateral visibility of the roadside at night, but should not be used in clear weather, since the bright light can blind oncoming drivers, despite the low beam position. Green color on the panel is your signal that you are creating additional light load on the road.

Rear fog lights: yellow or orange signal

The situation with rear optics is radically different, and these icons should under no circumstances be confused. Rear fog lights (or lights) are indicated by a symbol where the beams are directed to the right (since the headlight is facing backwards, but in the diagram it is on the left), and, most importantly, they are crossed out by a vertical line directed in the opposite direction from the beams.

The key difference lies in the color. The rear PTF indicator on the dashboard is always on yellow or orange. This is not done by chance: the orange color in car electrical systems often serves as a warning or indicates the activation of powerful consumers that may be visible to other drivers behind.

The rear fog lights have a very high brightness, comparable to brake lights, but they shine constantly. Turning them on in normal weather or in light rain can cause the driver behind, seeing a bright red light, to suddenly press the brakes, which will provoke an accident. Therefore orange indicator should always grab your attention.

• 🔴 Direction of the rays: to the right (symbolizes the light from behind).
• 🟠 Indication color: strictly yellow or orange.
• 💡 Power: they shine brighter than the dimensions, comparable to brake lights.
• ⚠️ Risk: May be confused with emergency stop signals.

On many cars, especially those built in Europe, rear PTFs can be implemented on only one side (usually the left, driver's side) or in the form of two high-brightness lamps in the rear light unit. Regardless of the design, the yellow icon on the panel will light up.

If you see a yellow symbol with crossed out rays pointing to the right on the panel, this is a clear signal: there is a powerful red light behind you. In good weather it should be turned off immediately. Traffic rules strictly regulate the use of this type of lighting only when visibility is less than 300 meters.

⚠️ Attention: Turning on the rear fog lights in normal visibility conditions is a traffic violation and may cause an accident due to dazzling drivers following you.

Comparison table: front and rear PTFs

To finally consolidate knowledge and eliminate confusion, let's systematize the information. The differences relate not only to color, but also to the logic of operation, as well as the impact on other vehicle systems. Below is a table that will help you quickly navigate.

Characteristics	Front PTF	Rear PTF
Indicator color	Green	Yellow/Orange
Direction of rays on the icon	To the left (from the headlight)	To the right (from the headlight)
Vertical bar	Present (to the left of the rays)	Present (to the right of the rays)
Main function	Side and bottom lighting	Identification of a car in the fog
Risk of blindness	Low (if properly adjusted)	High (blinds those walking behind)

As you can see from the table, the visual differences on the dashboard are quite significant if you know where to look. Green color always associated with front optics that create light, and yellow - from the back, warning of danger.

It is also worth noting that on some American cars, rear fog lights may be absent as a class, replaced simply by brighter lights. In this case, there simply will not be a corresponding switch and indicator on the panel. This is normal for the US market, but for Europe and the Russian Federation, the presence of rear PTFs is mandatory.

Why are there no rear PTFs in the USA?

In the USA, requirements for lighting devices differ. There, it is allowed to use bright red side lights that function as fog lights. A separate powerful light source from behind is often not provided for by the design, which is why there is no icon on the panel.

Where to look for the switch: location of controls

The location of the buttons or rotary switches for controlling the lights can vary greatly depending on the model and year of the vehicle. In modern cars, manufacturers strive to place controls ergonomically, but often hide PTFs in secondary menus.

On most left-hand drive vehicles (including Volkswagen, Audi, Skoda) the switch is located at the end of the left steering column lever. This is a rotary ring that needs to be pulled out towards you or turned until it clicks. The corresponding icons are marked on this ring.

In French-made cars, for example Renault or Peugeot, the controls are often located on a separate block of buttons to the left of the steering column or on the center console. It is important here not to confuse the PTF button with the headlight range control or washer button.

In premium cars with digital dashboards, there may be no physical button at all. In this case, control is carried out through the on-board computer menu. You will need to find the section Vehicle → Light or Settings → Light and there activate the desired mode. This is less convenient, as it requires distraction from the road.

If you change to a right-hand drive car (Toyota, Nissan from Japan), the logic can be maintained, but the lever will be on the right. However, most often the light control unit is left on the left to meet international standards, even if the steering wheel is on the right.

If you turn the ring and the light does not turn on, check if the main headlights are on.

Features of designations in different car brands

Despite standardization, each automaker makes its own adjustments to the interface design. This can be confusing for a driver accustomed to one brand. Let's look at a few typical examples to make you feel more confident.

In cars BMW Series 3 and 5, the control is often combined with a headlight height control. The ring located to the left of the steering wheel has several positions. PTF icons here can be printed in small print, and the indication on the dashboard appears only when activated. BMW symbols always follows European standards.

In Korean cars (Hyundai, Kia) in recent years of production, a separate backlit button is often found, located on the panel to the left of the steering wheel. It may look like a headlight with wavy lines in front of it. Sometimes a long press is required to turn on, which is done to protect against accidental activation.

In older models VAZ (classic, Samara) separate key switches were used, which could be installed in any location on the torpedo. Here it was important not to confuse the PTF button with the button for heating the glass or fan. In modern Lada Vesta and Granta control has been moved to the steering column switch or a button on the console with a clear icon.

In electric vehicles such as Tesla, light control is often completely touch-sensitive and located in a menu on the central screen. There, the PTF icon can be hidden in the “Lighting” submenu. This is an example of how digitalization makes simple functions more difficult to access, requiring more concentration from the driver.

Regardless of the brand, logic of operation remains the same: the front light is green, the rear light is yellow. Based on this principle, you can understand even the most non-standard interface.

Legal aspects and safety of use

The use of fog lamps is regulated by section 19 of the Road Traffic Regulations. PTF can be used at night in conjunction with low or high beams, as well as during the day in conditions of poor visibility (fog, rain, snowfall, smoke).

Separately, it is worth mentioning the rear PTFs. Their use is permitted only in conditions of poor visibility. Turning them on on a clear night or during light rain when visibility exceeds 300 meters is a violation. The fine for this, according to Part 1 of Art. 12.15 of the Code of Administrative Offenses of the Russian Federation (in the context of improper use of lighting devices), can be written out, although in practice inspectors rarely pay attention to this unless it creates an emergency situation.

However, the main danger is not the fine, but the risk of an accident. The bright light of the rear fog lights in good weather is perceived by the brain of the driver of the car behind as a danger signal or a stop light. The reaction may be sudden braking, which at high speed will lead to a chain reaction of accidents.

⚠️ Warning: The installation of xenon or LED lamps in reflector fog lamps that are not designed for this purpose is prohibited and will result in severe glare to oncoming drivers, even if the headlights are adjusted correctly.

It is also important to monitor the adjustment of the light beam. If you notice that when you turn on the PTF, oncoming drivers constantly flash their headlights at you, your headlights may be knocked down and shining too high. In fog, this is especially critical: the light should spread along the road, and not hang in the air, creating a “wall of light.”

Regularly checking the functionality of all lighting devices is the responsibility of every driver before leaving. A burnt-out lamp in a PTF can become an unpleasant surprise precisely at the moment when it is vitally needed.

Frequently asked questions (FAQ)

Is it possible to drive with the PTF on during the day without low beams?

According to traffic regulations, during daylight hours with the PTFs turned on, you can only drive in conditions of poor visibility. In clear weather during the day, PTFs should be turned off unless they are used as a replacement for daytime running lights (DRLs), but only if the vehicle design allows this and the luminous flux complies with the standards for DRLs. However, many drivers use PTF instead of burnt-out DRLs, which is a violation, since their spectrum and scattering angle are different.

Why does the PTF icon light up, but the headlights themselves do not light up?

This may indicate several problems: a lamp has burned out, the power relay is faulty, a fuse has blown, or the contacts in the connector have oxidized. It is also worth checking whether the connector is tightly seated on the headlight itself - it could have come loose due to vibration. If the indicator on the panel is on, it means that the command to turn on is given, but the current does not reach the lamps.

Is it possible to install rear PTFs if they were not there from the factory?

Theoretically, it is possible, but this will require changes to the design of the vehicle, which entails a complex registration procedure and obtaining a certificate from the traffic police. Without registration, such interference is illegal. In addition, the rear light must have space for an additional reflector and lamp.

What is the difference between the PTF badge and the DRL badge?

The DRL (Daytime Running Lights) icon usually looks like two headlights with arrows pointing downwards, or just a headlight without the beams crossing out. The DRL indicator is often green, but the symbol is different. PTFs always have crossed out rays. DRLs operate automatically when the engine starts, PTFs require manual activation.

How often do you need to change fog lamps?

The lamp life depends on its type (halogen, xenon, LED) and operating conditions. Halogen lamps in PTFs often burn out faster than in headlights due to moisture and dirt, as well as vibrations. It is recommended to check their condition before each rainy and foggy season. If you notice darkening of the headlight glass or a decrease in brightness, it’s time to change the lamp.