Installation of additional lighting of the state registration plate (GRP) is not just a matter of aesthetics, but also a strict requirement of traffic rules. In the dark, traffic police officers have the right to issue a fine if the license plate is not read due to the absence or malfunction of the illumination. Many car owners face the problem of burnout of regular incandescent lamps or their dim glow, which prevents the cameras of fixation of violations to recognize the symbols on the plate.
Modern solutions based on LEDs (LED) offer brighter and more durable light and consume significantly less power on the onboard network. However, the process of replacing or installing from scratch requires careful consideration of component selection and compliance with electrical circuits. Incorrect installation can lead to oxidation of contacts, short circuit or even damage to the wiring of the car.
In this article, we will discuss in detail all stages of work: from the selection of suitable lamps to the final check of the tightness of the ceiling. You will learn how to avoid common connection errors and make room lighting as efficient and safe as possible for your vehicle’s electrician.
Selection of equipment: lamps and plafonds
The first step to quality lighting is to choose the right light source. Standard filament lamps of the type W5W or C5W They often have a low resource and a yellowish hue of glow. The transition to LED analogues allows you to get a cold white light, which is not only better read, but also looks more modern.
When buying, you should pay attention to the availability current-stabilizer in the lamp design. Cheap LEDs without a driver quickly fail due to voltage surges in the on-board network of the car, especially at the time of engine start. Quality products have built-in protection against overheating and overheating.
It is also important to consider the color temperature. According to the GOST, the lighting should be white. The use of blue, red or flashing elements is strictly prohibited and can result in severe fines or even disenfranchisement. Plaphones should also be transparent and not distort the color reproduction.
- 💡 Basin type: check in the manual of the car what type of lamp is used (T10, Festoon, etc.)
- 🌡️ Color temperature: Choose the 4000K-6000K range for pure white light
- 🛡️ Leakproof: the diode lamp body must be protected from moisture (IP65 and above)
- 🔌 Polarity: LEDs are sensitive to polarity, check the circuit before buying
⚠️ Warning: Installation of lamps with color glow (except white) on the spot of the room lighting is a violation and entails administrative liability.
If the standard plafonds are made of cheap plastic, which eventually becomes cloudy, it makes sense to replace them with new ones or install universal LED modules. Universal solutions often have a flexible design and can be built into a regular place or fixed next to the number.
Required tools and materials
To perform work on dismantling old elements and installing new ones, you will need a minimum set of tools. It is important to prepare the workplace in advance so that in the process you do not get distracted by the search.
The main tool will be a set of screwdrivers and plastic blades for removing the skin. Metal tools should be used with caution so as not to damage the paintwork of the body or scratch the plastic of the plafonds.
☑️ Preparation for installation
To connect the wires and isolate the contacts, you will need tape or shrink tubes. Using a soldering iron is preferable to simple twists, as it provides more reliable contact and protection against oxidation.
- 🔧 Set of screwdrivers (cross and flat)
- 🪛 Plastic mounting blades
- ✂️ Wire-cleaning knife
- 🔌 Tap or shrinkage
- 🧤 Hand protection gloves
Don't forget the multimeter. This device will check the presence of voltage on the contacts, ring the chain for breaks and make sure that the safety lock is in service before the start of active actions.
Dismantling of staff plafonds and preparation
The process of removing the ceiling lights of the room varies depending on the model of the car. In most cases, they are attached to latches or screws. Before starting work, be sure to remove the negative terminal from the battery to exclude short circuit.
If the plafond is kept on screws, gently twist them out with a suitable screwdriver. If latches are used, tuck the edge of the plafond with a plastic spatula and pull on yourself with a light effort. Be careful not to break the locks.
What if the balcony is stuck?
If the plastic plafond is not removed, it may be frozen or boiled from dirt. Do not use excessive force. Try to warm the edges slightly with a hair dryer or spray penetrating lubricant (WD-40) into the gap, then carefully try again.
After removing the plafond, disconnect the connector with the wires. In some models, the wires go directly to the cartridge that will need to be removed. Examine the wiring state: if traces of oxidation or melting of insulation are visible, they must be cleaned and restored.
Clean the niche of the installation from dirt and dust. The accumulated moisture inside the lamp is a common cause of lamp burnout, so make sure that the drainage holes (if any) are not clogged.
Connection scheme and electrician
Connecting the number backlight is usually carried out in parallel with the position lights or a separate wire coming from the light control unit. The standard circuit involves two wires: “plus” (power) and “minus” (mass).
To search for the supply wire, use the multimeter in voltage measurement mode. Turn on the car's overall lights and check the contacts in the connector. On the right wire should appear voltage of about 12 volts.
| Color of wire | Function | Note |
|---|---|---|
| Black/Brown | Mass (GND) | Usually goes to the body. |
| Red/White | Food (+12V) | Appears in size |
| Yellow/Orange | The collar | Don't use it for lighting! |
| Blue/Green | Others. | Requires multimeter checks |
When connecting LED tapes or modules, an additional resistor or stabilizer is sometimes required if the standard voltage is too high for diodes. However, most finished car LED lamps already have built-in protection.
⚠️ Warning: Never connect the number light directly to the battery without a switch. It should only light up with the position lights, otherwise you risk draining the battery overnight.
Connection of wires is best performed by soldering method with subsequent insulation by thermal shrinkage. The twists in the vibration and humidity of the car quickly oxidize, which leads to loss of contact and flashing light.
Installation and sealing
After preparing the wiring, you can start installing new elements. Insert the LED lamp into the cartridge, observing the polarity. If there is no glow, flip the lamp 180 degrees - LEDs only work in one direction.
Place the slaptop in place and fix it. Now is the time to check the system. Put on the battery terminal and turn on the dimensions. If everything works correctly, you can proceed to the final sealing.
Pay special attention to the places of entry of wires into the plafond. If the design does not provide for factory tightness, use an automobile sealant. This will prevent water from getting inside when washing your car or in the rain.
Check the uniformity of the glow. Light should fall strictly on the license plate, without blinding drivers from behind and without leaving the plate. If it shines too brightly in the sides, you can paint the sides of the plafond with black paint or use a tinting film (not on the room itself!).
Verification of work and compliance with GOST
The final stage is to check the quality of lighting. At night, go to the back of the car and evaluate the result. The number should be clearly readable, all symbols should be evenly lit.
According to GOST R 2021, external lighting devices should not create a blinding effect. Make sure your tuning doesn’t interfere with other road users. Also check if the lights are flashing when the engine is running (this may indicate problems with the stabilizer).
If you have installed powerful LEDs, make sure they do not interfere with the radio or other electronic systems of the car. High-quality lamps have a shield and do not create electromagnetic tips.
- ✅ The number is read from a distance of 20 meters.
- ✅ The color of the glow is strictly white
- ✅ There is no flickering when the engine is running
- ✅ The plafon is sealed and does not fog.
Properly installed and sealed backlight will not only protect against fines, but also prolong the life of the electrician of the car.
Frequently Asked Questions (FAQ)
Can I use blue or red lights to light up the room?
No, it's forbidden by the rules. The lighting should be white only. Colored lights on the room are equated to the installation of special signals or non-standard lighting devices, which entails a fine and possible seizure of the device.
Why do LEDs flash along with the turn signals?
This happens if the wires were tangled during installation or the LED is connected to the turn signal circuit. Blinking can also occur due to poor mass contact. Check the connection circuit.
Do I need a resistor when installing LED lamps?
In most modern LED lamps for auto resistor is already built in. If you use separate LEDs or tapes, the calculation of resistance is mandatory, otherwise they will burn from overvoltage.
How to remove the fogging of the plafond from the inside?
It is necessary to disassemble the plafond, dry it with a hair dryer and carefully glue the joints with a sealant during assembly. Also check the vents – they should not be closed.