Managing the exterior lighting of the car is a basic skill that every driver receives in driving school, but in practice many are confused in the nuances of its application. You can often find motorists who are on with the switch. position lamps They are often left in the daytime thinking that this is enough, or forget to turn them on in twilight, relying on automatic systems. Understanding exactly when this mode is activated is critical not only for security, but also for the wallet.
The traffic rules clearly regulate the use of lighting devices, but the technical implementation of these requirements in different cars can differ significantly. In some models, you need to manually twist the regulator, in others - it is enough to start the engine, and in the third - it all depends on the position of the ignition key and external sensors. To understand this diversity is necessary for each owner of the vehicle.
In this article, we will analyze in detail the algorithms of the lighting system, analyze typical errors and consider the legal consequences of their commission. You will learn to distinguish the standard behavior of the electrician from the signs of malfunction and you will know exactly at what point of the day or night it is necessary to activate a particular mode of backlighting of the body.
Distinction of position lamps from daytime running lamps
Many drivers mistakenly believe that the size of the DHO (Daytime running lights) are the same thing, just turned on with different intensity. In fact, these are different lighting devices with fundamentally different tasks and technical characteristics. Positioning lamps are intended primarily to indicate the width and length of the vehicle in poor visibility conditions where the primary light of the headlamps is not yet required or is used separately.
Daytime running lights, on the other hand, are designed solely to make the car visible during daylight hours. Their brightness is much higher than that of dimensions, and they are not designed to work in the dark without the main light, as they can blind other participants of the movement or not provide sufficient illumination of the license plate.
Visually, they can be distinguished by color and intensity of glow. Dimensions usually burn with a dim red light at the back and white at the front, while DHO is always a bright white light. In some older models of cars, the function of the DHO was performed on passing-beam or even fog lamps, which created confusion, but modern standards require the use of specialized LED modules.
⚠️ Attention: The use of position lights in the daytime instead of DRL or passing beam is a traffic violation in many countries, since the brightness of the dimensions is not enough for the safe designation of the car in the stream.
Technically, the power chain of these appliances is also often separated. If your car burned a light bulb size, it will not necessarily extinguish the DHO, and vice versa. Understanding this difference helps to diagnose electrical problems faster and respond to traffic police inspectors’ requirements.
Automatic mode: how the light sensor works
Modern cars are increasingly equipped with a system AUTO for lighting control. In this case, the driver does not need to think about when the dimensions are turned on - it does electronics. The main element here is a photosensor, which is usually located on the front panel of the torpedo or in the area of the windshield.
The principle of operation is simple: the sensor measures the level of external illumination. When the car enters the tunnel, underground parking or just comes to the evening, the resistance of the sensor changes, and the control unit signals to turn on the position lights and, if necessary, the passing beam of the headlights. It is convenient and reduces the risk of human error.
Automation is not always perfect, however. The sensor can be contaminated, closed by foreign objects (for example, a navigator or flavoring), which will lead to incorrect operation of the system. Also, the sensitivity threshold can be adjusted in such a way that in cloudy weather the dimensions will light up too early or, conversely, too late.
Why do the dimensions flash when switched on?
If the ignition key is turned over several times, it may be a diagnostic signal of a burnt out lamp or a malfunction in the control circuit. In some models, this is the mode of "polite illumination".
If the sensor missed the onset of darkness, the fine will be issued to you, not the manufacturer of the car. Control of the situation on the road always remains on the person.
Manual control: switch position
In cars without automatic mode or when it is forced to turn off, the light is controlled by a mechanical switch. It is usually located to the left of the steering wheel and is a swivel regulator or push-button unit. To include dimensions, it is necessary to transfer the handle to the position indicated by the symbol of two rays directed in different directions.
In this position, the front and rear lights and the illumination of the license plates and the dashboard shall be illuminated. This is the first stage of lighting, followed by the passing beam mode of the headlamps. Many drivers use this mode for short-term parking with the engine running (for example, when disembarking passengers), so as not to blind others with bright light headlights, but to mark the car.
There are also specific modes of operation of the switch. For example, in some cars (especially German production) there is a position "0", in which the dimensions do not burn even when the door is open, and a position in which the dimensions burn only when the ignition key is removed. This is called the “parking” function.
- 🚗 Regulation 0: All external lighting devices are switched off (except for alarms).
- 💡 Position of dimensions: The front and rear lights, the lighting of the cabin and devices are burning.
- ☀️ Regulation AUTO: The switching is automatically on the signal of the light sensor.
- 🔦 Position of passing beam: the main light of the headlights shall be added to the operating dimensions.
Some drivers leave the switch in the position of dimensions constantly, relying on the fact that when the engine is started, the passing light will burn. This is a valid strategy, but it increases the wear and tear of the lamps and the load on the generator if it is not necessary during the day.
Dependence on engine type and key position
The algorithm for inclusion of dimensions directly depends on the position of the ignition key and what type of engine is installed on the car. This is especially true for older models or basic trim levels where automation is absent or limited.
On cars with a gasoline engine and a conventional sting key, the following logic is often found: the dimensions are switched on immediately after turning the key into the "ignition" position (before starting the starter), if the light switch is installed in the appropriate position. However, many modern cars with a system Start/Stop And diesel engines logic changed to save battery power.
In such machines, the dimensions may not be switched on simply by turning the key or pressing the start button without starting the engine. They are activated only after the engine has successfully started and the generator has started to produce current. It's protection against accidental discharge. battery.
⚠️ Attention: On cars with a start-stop system at a short stop (for example, at a traffic light), the engine may stall. At this point, the dimensions and headlights continue to burn due to the battery, which should be taken into account during long downtime.
It is also worth noting the behavior of the system when extracting the key. In most cases, when pulling the key from the ignition lock, the light goes out. But if you leave the switch in the position of dimensions, and the key is removed, on some models (for example, Volkswagen, Audi) dimensions will remain burning. This is done specifically to indicate a car parked on an unlit roadside.
Table: Scenarios for the inclusion of position lamps
To systematize information about when and under what conditions the dimensions light up, it is convenient to use the summary table. It will help you quickly navigate in various situations that arise during the operation of the vehicle.
| Situation | Position of the key | Position of the switch | The result |
|---|---|---|---|
| Day parking | Extracted. | 0 (Off) | Don't burn. |
| Night parking | Extracted. | Dimensions | The dimensions are burning. |
| Starting the engine | Ignition on. | Dimensions | Depends on the car (often on fire) |
| Movement by day | Engine's running. | AUTO | DHO is burning (dimly dimensions) |
| Movement at night | Engine's running. | AUTO | Lights and dimensions |
This chart describes the standard behavior of most modern cars. However, it is always worth checking the user manual for your particular model, as manufacturers can make changes to the logic of the onboard network.
The logic of light operation depends on the combination of the key position, engine type and on-board computer settings, so there is no universal rule for everyone.
Problems with inclusion: malfunctions and diagnosis
If the dimensions have ceased to turn on or behave inadequately (blink, burn full), this is a signal of malfunction. The most common reason is a burnt lamp. In chains with a serial connection (which is rare, but occurs) or with problems with the "mass" can go out a whole group of devices.
A common problem is the oxidation of contacts in lamp cartridges or in the light switch itself. Over time, plastic ages, contacts burn, and current ceases to flow to consumers. It is also worth checking the fuses responsible for the outdoor lighting chain. Their burnout often indicates a short circuit in the wiring.
A more complicated case is a malfunction of the steering switch or comfort unit (BCM). In modern cars, it is the body control unit that distributes currents. If he "sees" an error in the circuit, he can completely turn off the supply of voltage to the dimensions to prevent fire.
☑️ Diagnosis of non-functioning dimensions
Diagnosis should start with a simple: replacing the lamp with a clearly serviceable one. If this doesn’t work, it’s best to turn to electricians, as interfering with wiring without knowledge can cause expensive electronics to fail.
Penalties and Liability for Misuse
The traffic rules (SDA) strictly regulate the use of lighting devices. According to paragraph 19.1 of the traffic rules of the Russian Federation, in the dark and in conditions of insufficient visibility, regardless of the road lighting, as well as in tunnels on a moving vehicle should be included headlights or passing lights, daytime running lights or fog-light.
Position lamps in motion (without passing beams or DRLs) cannot be used by themselves except when they are used as additional light in conjunction with the headlamps. Movement only with dimensions is equated to movement without light, which entails a fine.
There is also responsibility for the failure of lighting devices. If you do not have at least one position lamp, it is a malfunction in which the use of the vehicle is prohibited (paragraph 3.3.1 of the list of malfunctions). The inspector has the right to issue a fine and, theoretically, prohibit further movement until the fault is corrected.
- 💰 Fine for driving without light: warning or 500 rubles (parts) 1 st. 12.20 RF Administrative Code).
- 🚫 Fine for malfunction: warning or 500 rubles (parts) 1 st. 12.5 RF Code of Administrative Offenses).
- 🔦 Misuse: The use of headlights or unregistered special signals entails deprivation of rights, but this does not apply to the dimensions.
It is important to understand that the absence of light is not just a formal violation. This is a direct risk factor for accidents, especially at dusk, when the silhouette of a car without light signs is almost invisible.
⚠️ Attention: Legislation can change. Always check the current fines and rules in official sources or applications for drivers, as the amounts and articles of the Administrative Code can be adjusted.
Frequently Asked Questions (FAQ)
Can I drive only in the daytime with dimensions?
No, according to traffic rules, daytime running lights (DWLs), passing beam headlights or fog lamps should be switched on during daylight hours. The marker lights are designed to indicate the size of the car in the dark, together with the main light or when parking. Driving only with dimensions during the day is considered a violation.
Why do the dimensions burn when the car is silenced and the key is not there?
This is the normal function of the parking lights. If you pulled out the ignition key and the light switch remained in the position of dimensions, they will burn until the battery runs out or you turn off the lights. This is done to indicate a parked car.
What if the size of the lights up on their own?
Spontaneous inclusion may indicate a circuit in the wiring, a malfunction of the relay or body control unit. Also check if the light switch is stuck. If the problem recurs, a diagnosis is needed from an electrician, as this can lead to battery discharge or fire.
Does the type of lamp (LED or halogen) affect the operation of the dimensions?
Yes, it does. If you have replaced the standard lamps with LED (LED) without installing special tricks (resistors), the onboard computer may perceive them as burned out due to low current consumption. As a result, the dimensions can flash, not turn on or give an error on the dashboard.
Do I need to turn on the dimensions when stopping at the side of the road at night?
Yes, if you stop on an unlit section of the road or in conditions of insufficient visibility, you must mark your car. Turn on the position lights. If the dimensions do not work, according to traffic rules, you must put an emergency stop sign.