Multi-System Integrated Wiring：Adopts a main wiring harness + multi-branch structure, integrating interfaces of body electrical systems such as dome lights, reading lights, door locks, ignition switches, and door control switches, realizing unified power supply and signal transmission for the entire vehicle interior electrical system, and simplifying wiring complexity.

High-Reliability Contact Design：Key contacts such as C, B+, P, T, F, and R adopt the parallel crimping process. Multi-point connection improves current-carrying capacity and connection stability, avoiding the risk of single-point failure.

Anti-interference Protection Treatment：Wires are protected with self-winding tubes, and both ends are flattened and sealed; key contacts and branch points are wrapped with insulating tape to improve waterproof and dustproof performance and adapt to the complex environment inside the vehicle.

Precise Length Control：The length tolerance of all wire harnesses is strictly controlled within +20/-0mm to ensure precise matching with the original vehicle's holes and installation points, avoiding installation interference caused by being too long or too short.

Standardized Identification Specifications：Wires and contacts adopt a dual identification method of wire number tubes + labels, corresponding to codes such as H, J, K, L in the drawings, which facilitates later maintenance and fault diagnosis.