Automotive lighting connectors can be categorized into several types based on their function, structure, and application. They are primarily used to achieve stable electrical connections between the lighting fixtures and the vehicle's electrical system. The following are the main types classified according to different dimensions:
Classification by Connection Structure
Wire-to-Wire Connector: Used to connect two wire harnesses, commonly found between the lighting assembly and the main wiring harness.
Wire-to-Board Connector: Connects the wire harness to a PCB circuit board, widely used in LED headlight driver modules.
Board-to-Board Connector: Enables connections between different circuit boards, undertaking signal transmission tasks in intelligent automotive lighting control systems.
Classification by Bulb Interface Type
These connectors directly mate with the bulb and represent the most basic connection type in automotive lighting systems:
Halogen Lamp Common Interfaces
H1: Single pin, commonly used for high beams
H4: Three pins, supports integrated high and low beams, robust structure
H7: Two pins, widely used for low beams
H11: Oval plastic connector, mostly used for fog lights
Xenon Lamp Interfaces
D2S: Used for projector headlights, without ballast
D3S/D4S: With or without integrated ballast, suitable for high-end models
LED Dedicated Interface More compact design, supports high-frequency signal transmission, adaptable to modular LED light sources
