What are the items for automotive wiring harness inspection? How to test automotive wiring harness?

Automotive wiring harness is a collection of cables connecting automotive electrical systems, containing many wires and connectors. In the process of automobile production, the wiring harness needs to undergo rigorous testing to ensure its quality and reliability, to avoid failures or safety accidents in the process of use. This article will introduce the automotive wiring harness testing projects and methods. First, the automotive wiring harness inspection project wiring harness appearance inspection: check the surface of the wiring harness is damaged, cracked, broken, deformed, etc., as well as the installation of wiring harness connectors are correct and firm. Resistance test: check whether the resistance value of each wire in the wiring harness meets the standard requirements, in order to determine whether the line is normally energized. Insulation resistance test: Check whether the insulation resistance between the wires in the harness and between the wires and the ground meets the standard requirements, in order to determine whether the line has sufficient insulation performance. Voltage detection: Check whether the voltage of each wire in the harness meets the standard requirements to determine whether the line is normally energized. Short-circuit detection: check whether there is a short-circuit phenomenon between the wires in the wiring harness, in order to avoid line failures and safety accidents caused by short-circuit. Delay test: test the delay time of the wire transmission signal to ensure that the line transmission signal speed in line with the standard requirements. Tension test: check whether the tension of the wire harness connector meets the standard requirements to ensure that the connector is installed firmly and reliably. Durability test: simulate the harness in the use of vibration, temperature, humidity and other environmental factors, check whether the harness can maintain stable performance in the long-term use of the process. RF interference test: check whether the harness interferes with RF signals to ensure that the harness will not have an impact on the car communication and navigation systems. Second, the method of automotive wiring harness inspection appearance check: visual inspection or use a magnifying glass and other tools to check the wiring harness, check the contact of each connector, and whether there is damage or deformation and so on. Resistance detection: use a multimeter or resistance meter to test the resistance value of each wire in the harness, compare the test results with the standard value to determine whether the line is normally energized. Insulation resistance test: Use insulation resistance tester to test the insulation between wires in the harness and between wires and ground.

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