Side lights in a car: design, rules of use and repair

Side lights are those small but critical elements of the car that many drivers remember only after a fine or a night stop by an inspector. They don't blind oncoming drivers like headlights, and don't signal turns like turn signals. However, it is the dimensions that make your car visible in darkness, fog or poor visibility, preventing road accidents. According to traffic police statistics, up to 15% of accidents at night occur due to non-compliance with the rules for using side lights.

In this article we will look not only what are side lights and where they are located, but also:

• 🔧 How to check their functionality without visiting a service station
• 📜 Fines for unlit dimensions in 2026 (with current amounts)
• ⚡ Typical faults and how to fix them yourself
• 💡 Modernization of dimensions: LED vs halogen, legality of tuning

We will pay special attention hidden problems that are not visible during daytime inspection, but appear in wet weather or at sub-zero temperatures.

What are side lights and why are they needed?

Side lights (or dimensions) is low power lighting devices, installed at the corners of the car: front (white) and rear (red). Their main function is indicate the dimensions of the vehicle in conditions of insufficient visibility so that other road users can assess its size and position on the road.

Unlike low beam headlights, dimensions:

• 🔹 Don't blind oncoming drivers (lamp power is usually 5–21 W)
• 🔹 Work autonomously from turning on the ignition (on most models)
• 🔹 Required for use when stopping in the dark (clause 19.3 of the Russian Federation Traffic Regulations)

Interesting fact: on trucks and trailers, parking lights are often duplicated side markers (orange) which are visible at an angle. This is a requirement GOST R 41.48-2004, but for passenger cars such markers are not required.

⚠️ Attention: If your car has daytime running lights (DRL), this does not relieve you from the obligation to turn on the lights at night. DRLs are intended for daytime driving only and do not replace side lights when parked or in poor visibility conditions.

Where are the side lights in the car: location diagram

The typical location of side lights is regulated GOST R 41.48-2004 and depends on the type of vehicle. For passenger cars the scheme is as follows:

Vehicle zone	Number of lights	Color	Typical installation location
Front	2	White	In block headlights or separate lampshades at the corners of the bumper
Rear	2	Red	In the taillights next to the brake lights
Side markers (optional)	2–4	Orange	On fenders or doors (for trucks and trailers)

On modern cars, the dimensions are often integrated into a single light unit with turn signals and brake lights. For example, on Volkswagen Golf or Toyota Camry the front dimensions are located at the bottom of the headlamp, and on Lada Vesta - in a separate lamp on the bumper.

To find the dimensions on your car:

1. Turn on side light (usually this is the first position of the turn signal or a separate button with a light bulb icon).
2. Walk around the car and pay attention to the smallest burning lights - these are the dimensions.
3. If the lights do not light, check the fuses (more on this in the section on faults).

When to turn on side lights according to traffic rules 2026

The rules for using side lights are specified in paragraphs 19.3, 19.4 and 19.7 of the Russian Federation Traffic Regulations. Their inclusion is mandatory in the following cases:

• 🌃 In the dark (from sunset to sunrise) on standing car (if there is no illuminated parking lot).
• 🌫️ In case of insufficient visibility (rain, fog, snowfall) - even during the day!
• 🚗 In the tunnels (together with low beam or DRL).
• 🔧 When towing — the dimensions should light up both cars.

An important nuance: if you stop on the side of the road in the dark with engine running, enough dimensions. If the engine is turned off, you additionally need to set warning triangle (clause 7.1 of the traffic rules).

⚠️ Attention: Included dimensions do not replace low beam while moving! If you are driving at night, turn on your headlights (low or high beam). Dimensions in motion are used only in conjunction with the main lighting.

Penalties for non-compliance with the rules:

• 💰 500 rubles (Part 1 of Article 12.20 of the Code of Administrative Offenses) - for not having lights on when parking in the dark.
• 💰 1,000 rubles - if an accident occurred due to faulty dimensions (Part 2 of Article 12.5 of the Administrative Code).

Typical side light malfunctions and their causes

Side lights fail less often than headlights or brake lights, but their failure often goes unnoticed until the first fine. Main reasons:

Symptom	Probable Cause	How to check
One light doesn't light up	The lamp has burned out, the contact has oxidized	Replace the lamp with a known good one
All dimensions do not work	Fuse blown, switch faulty	Check fuse (usually F5 or F10, see diagram)
Dimensions flash or dimly lit	Poor contact in the connector, low voltage	Move the lamp socket, check the battery
The rear lights are on, but the front lights are not.	Broken wire in the harness (often under the hood)	Test the circuit from the fuse box with a tester

The most common problem is contact oxidation in the lamp socket. This occurs due to moisture (such as pressure washing) or temperature changes. By car VAZ 2110–2115 and Renault Logan Rear dimensions often suffer due to poor sealing of the lights.

Another insidious malfunction - "stray currents"when the dimensions glow faintly even with the ignition off. This is a sign of a problem with light control unit or generator (on older machines).

How to check the size fuse without a tester?

Open the fuse box (usually under the steering wheel or in the glove compartment) and locate the fuse labeled 10A and a light bulb icon. Visually inspect it: if the thread inside is burned out, the fuse must be replaced. On most cars this is a fuse. F7 or F10, but check the diagram in the manual.

How to replace a side light bulb yourself

Replacing a headlight bulb is one of the simplest operations that even a beginner can handle. You will need:

• 🔧 New lamp (type depends on the model, most often W5W or T10)
• 🧤 Gloves (to avoid leaving greasy marks on the headlight glass)
• 🔦 Flashlight (if you work in the dark)

Step-by-step instructions for the front marker (for example Lada Granta):

For rear dimensions, the algorithm is similar, but access is usually through the trunk. On Ford Focus or Skoda Octavia It may be necessary to remove the trunk trim.

⚠️ Attention: On some vehicles (for example, Audi A4 B8) To replace the parking lamp, you will have to remove the entire headlight. If you are not confident in your abilities, it is better to contact the service so as not to damage the fastenings.

Lamp cost:

• 💡 Halogen (W5W) - from 50 rubles (for example, Osram or Philips).
• 💡 LED analogue — from 300 rubles (for example, MTF Light).

Modernization of side lights: LED, tuning and legality

Many drivers want to make their dimensions brighter or more original. The most popular upgrade options:

• 🔦 Replacing halogen lamps with LED — gives brighter and cooler light, but requires the selection of lamps with the correct base (W5W, T10, BA9s).
• 🎨 Tinting of lampshades — changes the color of the dimensions (for example, to blue or green), but this prohibited by traffic rules (Part 3 of Article 12.5 of the Administrative Code - deprivation of rights for 6–12 months!).
• 🔄 Setting dynamic dimensions (with the effect of "running fire") - allowed if it does not blind other drivers.

According to the law (clause 3.6 GOST R 41.48-2004):

• ✅ Permitted to use white LED lamps in the front dimensions, if certified.
• ❌ Prohibited colored lamps (except for red ones in the rear lights).
• ❌ Prohibited headlight tinting, reducing light transmission by more than 15%.

Example of legal tuning: on BMW 3 Series (E90) LED dimensions are often installed with kanbus controllersto avoid errors on the dashboard. And on Toyota Land Cruiser 200 popular sizes with xenon filling (but this already borders on a violation, since the spectrum of light changes).

Frequently asked questions about parking lights

Is it possible to drive during the day with only the lights on, without low beams?

No. According to clause 19.5 of the traffic rules, during the day on a moving vehicle must be switched on or low beam headlights, or daytime running lights (DRL). The dimensions are not suitable for this purpose - they are too dim and not visible from afar.

Why are the lights dim or blinking?

This is a symptom of one of the problems:

• 🔋 Weak battery — the mains voltage is below 12 V.
• 🔌 Oxidation of contacts in the cartridge or on "ground".
• 💡 Low quality lamp (especially relevant for cheap LEDs).

First check the voltage at the battery terminals, then clean the lamp socket contacts.

What is the fine for not having a light on in 2026?

If it doesn't work one size, the inspector may issue a warning or fine 500 rubles (Part 1 of Article 12.20 of the Administrative Code). If they don't light all dimensions or because of this an accident occurred - the fine increases to 1,000 rubles.

Important: if an inspector stops you at night with your lights off, he has the right tow the car to the impound lot (clause 2 of article 27.13 of the Administrative Code), since this is considered malfunction threatening safety.

Is it possible to put blue lamps in the dimensions?

No, it's prohibited clause 3.6 GOST R 41.48-2004. For color dimensions (except for red at the back and white at the front) deprivation of rights for 6–12 months (Part 3 of Article 12.5 of the Administrative Code). Exception - emergency services vehicles (police, ambulance).

Why don't the lights turn off after the ignition is turned off?

This may be caused by:

• 🔧 Dimension relay malfunction (contact sticking).
• 🔋 Alarm problem (some systems leave the lights on in security mode).
• 📱 Error in the body control module (BCM) (relevant for Volkswagen, Audi).

First check if the mode is enabled "Follow Me Home" (if your car has it) - it leaves the lights on for 30-60 seconds after turning off the ignition.