In engineering practice, information such as product failure mode and failure mechanism is generally obtained from FMMEA (Failure Mode Mechanism and Ef-fect Analysis), which is the so-called failure mode, mechanism and effect analysis. However, it is still difficult to complete the quantitative reliability evaluation of a product only through FMMEA, because the FMMEA provided under normal industrial environmental conditions still lacks the necessary technical details for accelerated test design. The automotive wiring harness is mainly composed of copper connectors, plastic sheaths and wires. The connectors are crimped with the wires and installed in the plastic sheath. The wires are bundled with wire harnesses and wrapped with tape. The role of the wire harness in the vehicle is The power signal and data signal of the electrical system are transmitted and exchanged to realize the functions and requirements of the electrical system. Automotive wiring harnesses are used in various parts of the car, such as in the engine compartment under high temperature environment, under the chassis in harsh environments such as sand, dust, water and mud stains, and at the bends of the front and rear doors and luggage rear cover of the car, etc. Automotive wiring harnesses work in these complex and harsh environments for a long time, and may face various failures.
Therefore, studying the failure modes and mechanisms of automotive wiring harnesses plays an important role in preventing the failure of automotive wiring harnesses.