Numerical simulation used to predict disturbances induced at the end of cable harnesses connected to automotive electronic equipment requires a realistic knowledge of the terminal loads. This supposes that these loads should be known as well as necessary to perform reliable simulations. The randomness of automotive cable harnesses raises the question of the precision needed on these loads. This paper focuses in particular on the need for data unavailable in the early stage of development such as traces on the PCB of the equipment. Despite the random effect of the cable harness the results show that the PCB traces cannot be omitted when terminal electrical responses are considered. The statistical behavior of the cable harness is compared to the response of a uniform bifilar cable.
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