What is the terminal withdrawal wire harness is the neural network system of the car, which is responsible for transmitting voltage, signal and a large amount of data during the operation of the whole vehicle. Especially in the context of the Internet and big data, not only the wire harness carrier is required to play the role of on-off, but also higher requirements are placed on the data transmission rate and response ability. At the same time, due to the limited physical layout space of the wire harness Rework presents an even greater challenge. Terminal withdrawal is a common failure mode of wiring harnesses. Back-out is when the terminal is not in its intended position, rendering the connector ineffective. The automobile wiring harness mainly relies on manual operation, and the difficulty of control can be imagined. In order to better prevent and control the terminal withdrawal problem, the control is mainly carried out from the following aspects: design selection, process protection, terminal crimping, assembly, Electrical testing and assembly.