Light switch: Turn on the headlight low beam at the end of the switch, press forward to turn it into a high beam, and press backward to return to the low beam.
The control principle of car headlights is shown in the following figure:
At present, the specifications and models of car headlights are generally H 1, H4, H7, 9004, 9005, 9006 or 9007. The retail price of parts market varies from place to place. This modification method has limited effect. However, the electrical load of lines, switches and power supplies is seriously increased, the heat energy of bulbs is increased, and the temperature of lamp cups is increased, which may easily lead to the overload and burning of lines and switches, accelerate the mercury aging of lamp cups, cause the lamp cups to melt and deform, and even cause fire accidents. The most common fault is that after a period of time, the contact of headlight combination switch is burnt out. Its luminous principle is to boost the DC voltage of 12V to the high voltage of 23000V, and generate discharge arc to generate light with high color temperature. In many countries, it is not allowed to replace the xenon bulb without replacing the assembly. Because lensless focusing will cause serious interference to other drivers, forming a safety hazard.