Hi and Lo modes in the car: a complete guide to using low and high beams

Every driver is faced with the need to switch headlights, but not everyone understands how to use the modes correctly Hi (high beam) and Lo (low beam). Errors in using these functions not only create dangers on the road, but also threaten fines from the traffic police. In this article, we will look at what these abbreviations mean, how they work in different cars, and what nuances need to be taken into account to make driving safe and comfortable.

Many people confuse Hi/Lo with buttons for headlight adjustment or fog lights, but in fact this is a separate system that directly affects the visibility and illumination of the road. For example, incorrect use of high beams in the city can blind oncoming drivers, and driving with low beams on the highway reduces visibility. We'll tell you how to avoid common mistakes and adjust the light to suit your needs - from manual adjustment to automatic systems in modern cars.

Below you will find step-by-step instructions for popular car brands, a table of fines for improper use of light, as well as tips on choosing lamps and diagnosing faults. If you've ever wondered why your headlights shine worse than others, or how to turn on the "American" Hi-Beam mode, the answers are below.

What do Hi and Lo mean on the light control panel?

Abbreviations Hi (from English High beam) and Lo (from English Low beam) denote distant and low beam headlights accordingly. These modes differ not only in brightness, but also in the direction of the light beam:

🔹 Lo (low beam):

• 💡 Lights up the road 40–60 meters ahead.
• 📉 The light beam is directed down and right (for right-hand drive cars - to the left) so as not to blind oncoming drivers.
• 🚗 Required for use in urban conditions, on illuminated streets and when driving in traffic.

🔹 Hi (high beam):

• 🌟 Lights up the road 100–150 meters.
• 🔦 Light beam wide and straight, without dimming for the oncoming lane.
• 🛣️ Applies to highways, country roads and in poor visibility conditions (rain, fog - but only with fog lights!).

In most cars, switching between modes is carried out lever on the steering column (often combined with direction indicators) or a separate button on the panel. For example, in Toyota Corolla and Hyundai Solaris the lever stretches on yourself to turn on the high beams, and in Volkswagen Polo there may be a separate switch with symbols DRL/Hi/Lo.

⚠️ Attention: On some American and Japanese cars (for example, Ford Mustang or Nissan GT-R) button Hi can activate "flash-to-pass" — a short-term flash in the distance for overtaking. This is not the same as constant high beam!

How to switch Hi and Lo correctly: rules and penalties

The use of high and low beam is adjustable Traffic rules (clauses 19.1–19.5). Basic rules:

• 🌆 In the city and populated areas Only low beam is allowed (Lo) or daytime running lights (DRL).
• 🛣️ Can be used on the track distant (Hi), but be sure to switch to low when passing oncoming traffic or if another car is driving ahead.
• 🌫️ High beam in fog, rain or snow prohibited — it is reflected from the drops and impairs visibility.

There are fines for violating these rules (relevant for 2026):

Violation	Fine (RF)	Additional measures
Driving with high beams in the city	500 ₽	Warning for first violation
Failure to switch from Hi to Lo when passing oncoming traffic	1 000–1 500 ₽	Deprivation of rights for 1–3 months for repeated violation
No low beam during the day (if DRL is not on)	500 ₽	—
Using Hi in Fog/Rain	500 ₽	A fine may be added for creating an emergency situation.

⚠️ Attention: In some countries (for example, Germany), driving with high beams in the city can result in a fine of up to 100 €, and in the USA the rules vary by state - somewhere it is allowed "flash-to-pass" to warn about overtaking, but in some places this is considered a violation.

Where is the Hi/Lo button located in different brands of cars?

The location of the light switch depends on the model and year of the vehicle. Here are typical options:

🔧 Japanese and Korean cars (Toyota, Hyundai, Kia, Mazda):

• 🎛️ Lever under the steering wheel on the left side (pull on yourself - turns on Hi, return to the original - Lo).
• 🔄 On some models (for example, Mitsubishi Outlander) there is a separate switch on the panel with positions OFF – DRL – Lo – Hi.

🔧 European cars (Volkswagen, BMW, Mercedes):

• 🔘 Button on the steering column switch (press forward for Hi).
• 💡 B BMW 5 Series and Audi A4 There may be a touch panel with touch control.
• 🔦 In older models (for example, Volkswagen Passat B5) — rotary ring on the steering column.

🔧 American cars (Ford, Chevrolet, Dodge):

• 📟 Lever on the steering column with fixation (pull until it clicks - Hi turns on constantly).
• 💥 Feature "flash-to-pass" (short-term activation of Hi for overtaking) activated by light movement of the lever on yourself.

🔧 Russian cars (Lada, UAZ):

• 🔄 Classic steering column switch (as in Lada Granta) or a button on the panel (in UAZ Patriot).
• ⚠️ In older models (for example, VAZ 2107) there may be no automatic switching - you need to do it manually.

How to find the Hi/Lo button if it is not on the lever?

In some machines (for example, Tesla Model 3 or Nissan Leaf) light control is located on the touch screen. Go to the menu Settings → Lighting and select the mode manually. In hybrid cars (for example, Toyota Prius) there may be a separate button Auto Hi-Beam for automatic switching.

Automatic Hi/Lo switching: pros and cons

Modern cars are equipped with a system automatic high/low beam switching (for example, Toyota Safety Sense, Volvo Pilot Assist). It works on the basis of cameras that analyze the road situation and switch the lights without driver intervention.

✅ Benefits:

• 🤖 Convenience: no need to constantly pull the lever manually.
• 🚨 Safety: the system reacts faster than a person (for example, when an oncoming car suddenly appears).
• 💡 Adaptability: some systems (for example, in Mercedes-Benz) adjust the brightness depending on the weather.

❌ Disadvantages:

• 💰 Expensive: repairing a camera or control unit costs 15 000–50 000 ₽.
• 🌧️ Errors in operation: in rain or snow, the system may incorrectly estimate the distance to cars.
• 🔧 Difficulty of setting up: in some cars (for example, Audi Q7) required camera calibration after replacing lamps.

🔹 How to disable automatic mode?

If the system does not work correctly, it can be temporarily deactivated:

1. Go to Settings → Lighting (or Driver Assistance).
2. Find the option Auto High Beam and uncheck the box.
3. In some machines (for example, Subaru Forester) you need to hold the button Hi 5 seconds.

Frequent Hi/Lo system malfunctions and their elimination

If the high or low beams do not turn on, the problem may be in the lamps, wiring or control unit. Let's look at typical breakdowns:

🔦 Both headlights do not light up in the same mode (for example, Hi):

• 💡 Burnt out lamps - check and replace (in LED headlights the diode may burn out).
• 🔌 Contacts have oxidized — clean the connectors on the back of the headlight.
• 🔧 Fuse burned out - find it in the block (usually F10 or F15 for light).

🔦 The light flashes or works every other time:

• 🔋 Poor ground contact — check the fastening of the negative wire to the body.
• 💧 Moisture got into the headlight - disassemble and dry (in LED headlights this is critical!).
• 🔄 The steering column switch is faulty — replace or clean the contacts.

🔦 Automatic mode does not work:

• 👁️ Camera is dirty — wipe it with a soft cloth.
• 🔌 Control unit disabled - check the fuse ECU-B.
• 📱 Need to update software — contact the service (for example, for BMW iDrive).

⚠️ Attention: If after replacing the lamps with LED or xenon the light does not work correctly, the problem may be ignition block. For example, in Honda Civic xenon requires a separate controller, otherwise the headlights will flicker.

How to improve headlights: lamp selection and settings

If the standard light does not suit you, it can be upgraded. Here are the main options:

💡 Tube types for Hi/Lo:

Type	Brightness (lumens)	Service life	Pros	Cons
Halogen (H4, H7)	1 000–1 500	400–600 h	Cheap, easy to replace	Weak light, getting warm
Xenon (D2S, D4S)	3 000–3 500	2,000–3,000 h	Bright white light	Dear ones, we need a correction
LED (COB, CSP)	2 000–4 000	30,000–50,000 h	Energy efficient, durable	Requires cooling

🔧 How to adjust the headlights yourself:

1. Place the machine on a level surface 5 meters from the wall.
2. Mark the wall according to scheme (the center of the headlights must coincide with the marks).
3. Adjust the screws on the headlight (usually top/bottom and left/right).
4. For xenon and LED use autocorrector (it's difficult to set up manually).

⚠️ Attention: Installation xenon or LED into headlights not intended for them, prohibited (fine 3 000 ₽ + confiscation of lamps). Check the headlight marking - if there is a letter H (for example, H7), then only halogen!

Hi-Beam Assist and other modern technologies

Manufacturers are actively introducing intelligent light control systems. Let's look at the most interesting ones:

🔦 Hi-Beam Assist (HBA):

• 🤖 Automatically switches Hi ↔ Lo when detecting oncoming cars.
• 📷 Works on the basis of a camera installed behind the rear view mirror.
• 🚗 Available in Volkswagen Golf, Audi A6, Skoda Octavia.

🔦 Matrix LED:

• 💡 The headlight is divided into segments, which are turned on/off independently.
• 🎯 It can “cut out” oncoming cars from the light beam, illuminating the rest of the road for distant ones.
• 💰 Installed on premium cars (Mercedes S-Class, BMW 7 Series).

🔦 Adaptive Light (AFS):

• 🔄 Turning headlights that follow the steering wheel and illuminate turns.
• 🌧️ Automatically adjusts brightness depending on the weather.
• 🔧 Requires calibration after replacing lamps or an accident.

🔹 Is it possible to install Matrix LED on an old car?

No, for Matrix LED to work, it requires not only special optics, but also an electronic control unit integrated into the vehicle’s CAN bus. Attempts to install such headlights on cars without factory support (for example, on 2010 Toyota Camry) lead to on-board computer errors and possible warranty failure.

Frequently asked questions about Hi and Lo in the car

❓ Is it possible to drive with high beams during the day?

No, this is prohibited by traffic rules (clause 19.5). Can be used during the day low beam or daytime running lights (DRL). High beams are turned on only in the dark or when there is insufficient visibility (for example, in a forest).

❓ Why don’t American cars have a separate Lo button?

In the USA, many cars are equipped with a system "Daytime Running Lights" (DRL), where the low beam turns on automatically when the engine starts. To activate Hi a lever on the steering wheel is used (as in Ford F-150), and a separate button Lo may not be.

❓ How to turn on “fog lights” with Hi?

Fog lights (Fog Lights) are turned on separate button (usually with symbols 🌫️). They can be used only with low beam (Lo) or separately (in some countries). Combination Hi+ fog lights prohibited - it will blind other drivers.

❓ What should I do if Hi turns on by itself?

This is a sign of a problem:

1. Check steering column switch — perhaps the contact group is stuck.
2. Inspect light relay (usually located in the fuse box).
3. If the problem is control unit (for example, in Renault Duster), diagnostics with a scanner is required.

❓ Why is Hi used less often in Europe than in Russia?

In Europe, roads are better lit, and the rules are stricter: high beams are only turned on empty highways or outside the city. In Russia due to poor lighting and long routes Hi is used more often, but this does not eliminate the need to switch to Lo when passing oncoming traffic.