Layout design
Different types of wire loops bundled together in a harness inevitably affect each other. Therefore, the interference-prone wires and the interference-prone wires should be separated as much as possible. It is recommended to follow the following rules for wiring harness layout:
Weak signal lines such as sensors cannot be wired in parallel with the power lines and ground lines of high-power inductive loads. Similar designs must be carried out in the vehicle topology design stage in advance. If it is unavoidable, it is necessary to enhance the anti-interference ability of weak signal electrical appliances;
A slight change in the direction of the high-voltage line will greatly change the EMC test trend of the vehicle. The high-voltage wiring harness should be arranged along the body as much as possible to optimize the electromagnetic radiation loop of the vehicle and use the shielding cabin closed by the body stroke;
The high-voltage wiring harness and the low-voltage wiring harness should be arranged separately, and the distance should be as large as possible.
Ordinary wires cannot be arranged around the radio antenna, and the antenna extension wire should be arranged as close to the body as possible;
The connection between the impedance converter and the antenna structure, as well as the connection between the radio filter and the antenna structure, cannot be bundled with other wiring harnesses;
Wires carrying high-current clock signals must be arranged far away from radios, amplifiers, etc.;
The power cable and ground wire of the wiper motor switched by the relay must be wired together close together. The power cable and video cable of the reversing image must be routed along the same side of the vehicle body. The video cable of the reversing image should not be bundled with the PWM signal cable. . Route in the same direction.