The automotive wiring harness is the core component of the vehicle electrical system. It is composed of wires, connectors, terminals, insulating sheaths and protective materials, and is responsible for power transmission and signal control. The wires are made of multi-strand copper cores, covered with PVC, XLPE and other insulating layers, with a temperature range of -40°C to 125°C, and have flame retardant, oil resistant and anti-aging properties. The wiring harness is distributed by region into engine compartment wiring harness, indicator light wiring harness, instrument panel wiring harness and body wiring harness, etc.