4 pin 7123-8345 MG610396 Plastic Housing Plug Auto Crimp Wiring Harness Connector

3. QR line beam design

(1) Design

The power distribution box (melting and relay) is the core of the entire vehicle electrical appliance. It plays the role of allocating loads, centralized power supply, saving space, simplifying wire beams, reducing costs and convenient maintenance. Generally, 2 to 3 power distribution boxes can be configured as needed. Some newly developed models have both electronic control functions, and central control boxes without contacts and fuse will also become more and more market.

(2) Selection of wire color

The selection of wire color is QC/T 414-1999 "Low -voltage wire color for automobiles".

(3) Selection of plug -in parts

① Use plugs according to the wire diameter and passing the current.

② Seal plug -in parts in the engine compartment.

③ Priority use of a dual -spring -type pressure -tight structure plug to reduce contact resistance.

(4) Wire beam bandage method

① Generally, tapes are used to wrap the tape in the cab.

② The tape is tightly wrapped in tape in the dashboard.

③ Flame -retardant ripples are bandaged on the floor or far from the engine.

④ The inside of the door and the luggage door generally uses a bandaging form of tape or industrial plastic cloth.

⑤ Some areas closer to the engine are used to use insulation glass silk sleeves or wiring bouquets of glass ribbons.

In addition to the above content, you should also pay attention to the distance between the anti-theft ECU and the read and write coil to prevent the signal transmission attenuation; the electrical components of each transmission signal such as oxygen sensor, the degeneration sensor, and the read and write coil should be selected. Line species such as shielding wires.

Simple instructions：

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