Headlights are an indispensable part of our safe driving, especially on dark nights. Without the assistance of headlights, our driving is not only inconvenient, but also has great safety hazards. Therefore, it is necessary to do a good job of checking and curing the headlights to avoid malfunctions.
The headlights are also called "headlights". Its assembly is one of the important parts to ensure the safe operation of the car. It is installed on the sides of the car head and is used for the illumination of night roads. It has two lights and four lights. Minute.
The above-mentioned faults are common on vehicles with four lights, the main reason is blindly switching to high-power headlamp bulbs. Because the quality of the headlights in the auto parts market is not guaranteed, the luminous intensity is insufficient. Many drivers and maintenance personnel have some lighting inspectors in order to make the headlights convenient for the convenience of the figure and the pursuit of the large luminous intensity of the headlights. The luminous intensity reaches the specified value, and the original headlight bulb is replaced with the above high-power bulb. As a result, the luminous intensity of the headlight is reached, but the failure of the headlamp circuit is greatly increased, and sometimes it is damaged. Charging system circuit.
Most of the four-lamp cars are equipped with headlights with a lamp power of 45W/50W. The headlights are divided into left and right 2 channels. Each line is protected by 15A fuses. The cross-sectional area of ​​the wires is 1.5mm2. Therefore, the current (8.3A) on each line is within the allowable range, and the headlamp circuit has few faults. When switching to a high-power headlamp bulb (100W), the current on each headlamp line is doubled (up to 16.6A), causing a severe overload of the headlamp line, which can cause the following various faults.
1. The battery is seriously depleted. After the headlights are turned on, the battery should be powered by the generator. Therefore, the brightness of the headlights is normal within about 2 hours of the start of the night car, and thereafter the brightness of the headlights is lowered because the battery can no longer supply power. And as the engine speed changes, the engine cannot be started with the starter after the engine is turned off.
2. The wire is heated, so that the resistance of the line increases, and the luminous intensity of the headlight decreases. In severe cases, the headlight line is short-circuited due to melting of the wire insulation layer, and even a line burnout or a car fire accident occurs.
3. The contacts of the light relay or combination switch in the line are ablated or bonded so that the circuit cannot be disconnected or turned on.
4. The fuse in the headlamp line is blown, making the front of the car dark.
5. When there are many electric appliances used and the generator overload duration is too long, the diodes and coils of the generator may burn out, so that the generator cannot generate electricity.
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