Connecting and installation of LED bulbs in H4 headlights

How to install LED H4 head light bulbs in headlamps Not difficult to do on their own. The design of LED equipment is similar to the standard, but there are peculiarities that need to be taken into account to do the job correctly. Therefore, it is better to study the specifics of installation to exclude mistakes and ensure a good result.

Peculiarities of selection and adjustment

First of all, it is necessary to take into account the fact that by law, LED lamps can be put only in headlamps marked "LED" or "L", it is applied to the reflector, or is on the body. If the system is designed for halogen, installing diode light sources may entail penalty 500 rubles.

LED lights provide quality light if properly installed.

If the design is suitable, it is important to LED bulb With the correct light distribution. This option uses two spirals - a dipped and a high beam. Moreover, the first element is always equipped with a small reflector of a certain configuration, as in the example in the photo.

This is what a standard H4 bulb looks like.

To ensure proper distribution of the light flux and prevent oncoming drivers from being blinded, the dipped-beam coil is moved forward slightly above the focal point. And the screen inside the bulb directs the light only to the upper part of the headlight reflector as shown in the diagram.

This is how the low beam from H4 lamp should be distributed.

The far-end light is different, its coil is located in the focal point and shines on the whole reflector. Due to this, a greater illumination distance is provided.

Read also: Rating of H4 car lamps

Wiring and pinout of H4 bulbs

To connect the bulbs correctly, you do not need to understand the design. Quality products should come with a standard connector in which the pins are always arranged in the same way.

The pin assignment is standard for all manufacturers and does not depend on the type of light in H4 bulbs.

If for some reason you need to install the connector yourself, the pinout shown above is used. This is how the wires must be positioned in order for the bulb to work properly. The connection is always made with the use of a strip, Do not just twist the wires or wrap electrical tape around the junction.

It is important that the design of the base match the standard halogen. If this is not done correctly, the light distribution will be disturbed and it is unlikely to be possible to adjust it.

It is better to buy bulbs from well-known manufacturers, cheap Chinese products do not provide a normal quality of light.

Topical video.

Installation in headlights

Installation of LED lamps H4 in headlights is carried out according to the step-by-step instructions. If you follow the correct sequence and do everything carefully, you can cope with the work, even if it is done for the first time:

1. Inspects the back of the headlight housing and the location of the covers. Very often access is restricted due to vehicle components such as the battery, air filter housing, etc. In this case it is necessary to remove everything in the way to ensure normal working conditions.
2. The battery terminal should be removed before you start work. This rule is worth observing whenever you need to do something in the car's electrical system. The necessary tools are prepared, often screws or small nuts need to be removed, and other devices may also be required.
3. Inspects the place of installation of the lamp. Most often it is fixed by a mounting bracket, which tightly presses the base to the seat. It is important to understand how to open it so as not to break the wire protrusions and not to deform them.
   The bulb should be removed carefully so as not to damage the bulb and not to break the retainer.
4. After removing the old bulb, disconnect the connector by gently pulling it toward you to remove the contacts. Sometimes terminals oxidize due to long use, moisture and constant heating and are difficult to remove. In this case, you can treat the connection with contact cleaner and gently pry up the joint with a flathead screwdriver.
   It is easier to remove the clamp and fix it separately to simplify installation.
5. It is desirable to remove the mounting plate from the LED lamp, it is usually just a little turn and remove it. It is better to put it separately, it is much more convenient. The element is fixed with a latch, and then you can insert the bulb and slightly turning it to fix it in the right position.
6. Usually the lamp connector is located on a small wire with the power supply. This simplifies installation, as you can connect the elements from the outside. Everything is simple here, the main thing is to insert the pins as far as they go.Then you need to choose the location of the wire, it is best to put it inside the headlight. If this is not possible, the unit with the connector is placed outside and secured with a plastic tie or double-sided adhesive tape.
7. The cover must be put in place so that it fits snugly. After that the process is repeated on the second headlight

In some models the entire headlight can be removed by pressing out the clamps or unscrewing the fasteners. There are also options when it is necessary to remove the wheel, as the lamp is accessed through a hatch in the fender.

Video tutorial: Replacing the H4 bulb with LED bulb in Hyundai Solaris.

Installation mistakes

There are several typical mistakes that are often encountered when installing LED bulbs. It is important not to let them:

1. Installation of the lamp, the location of LEDs in which does not coincide with the position of the spirals in the halogen analog. The light will not be distributed correctly.
2. Installation of the bulb in the wrong position. If it is displaced or inverted, it will not be possible to achieve normal lighting.
3. Driving without light adjustment. Even with a similar design, the luminous flux in LEDs is not distributed in the same way as in a regular light bulb. Therefore, a trip to adjust the headlights is mandatory.

You can not install lamps, the arrangement of the elements in which do not coincide with the position of the spirals in the halogen version.

Read also: Improving the light of the headlights in the car.

Safety precautions

To avoid electrocution and damage to car parts, it is necessary to follow a few simple recommendations:

1. Remove the terminal from the battery before starting work and put it back after assembling the headlights.
2. Carefully remove the bulbs so as not to break the glass. If the terminal does not come off, do not apply excessive force.
3. It is advisable to wear gloves so as not to scratch your hands on the protruding elements.
4. Provide good lighting of the working space.

For illustration we recommend thematic videos.

If the headlight is suitable for LED lamps, it is easy to install. It does not require a complicated circuit or special tools, everything is done almost the same way as when installing conventional halogen options.