In order to meet the requirements of automotive lightweighting, some new lightweight materials have been widely used in components such as car bodies and engines. As an important component of automobiles, wire harnesses account for 2% to 3% of the total weight of the vehicle. Moreover, as the proportion of automotive electrical systems increases, wire harnesses as electrical connection systems become increasingly complex, and their quality continues to increase. At present, the wires used in car harnesses are all copper wires. In recent years, with the continuous increase in copper prices and to meet the requirements of lightweight cars, it is imperative to seek new methods and materials to replace copper wires. Compared with copper wire, aluminum wire has the advantages of light weight and low cost, so aluminum wire is considered one of the most suitable materials for achieving lightweight automotive wiring harnesses.