What are the classifications of automotive wiring harnesses in the vehicle- Jijin Industral Co., Ltd.

We usually divide the vehicle wiring harness into front cabin wiring harness assembly, engine wiring harness assembly, transmission wiring harness assembly, instrument wiring harness assembly, interior wiring harness assembly, door wiring harness assembly (different for four doors), roof wiring harness Assembly, rear trunk wire harness assembly, battery positive and negative wire harness assembly, airbag wire harness assembly and several other parts. However, the division of the wiring harness has a great relationship with the structure and assembly process of the whole vehicle. In order to achieve a simple structure and easy disassembly and assembly, the specific model will use a modular design in the wiring harness as much as possible to reduce loops, and will not stick to these classifications.

Front cabin wiring harness assembly

The front cabin wiring harness is located in the worst environment, with many parts and a relatively small space. Therefore, when arranging the front cabin wiring harness, it is necessary to fully consider factors such as waterproofing, heat insulation, and vibration, and protect and fix the wiring harness.

The main electrical components in the front cabin: powertrain and its accessories (currently, there are also fewer models with rear-mounted engines), ABS system, lamps, wiper washing system, power system, central electrical box (some models are also placed indoors) ) and some other electrical devices.

Powertrain harness

The powertrain wiring harness is also located in the front compartment, including the engine wiring harness and the transmission wiring harness.

There are many sensors and actuators on the powertrain. It is necessary to fully consider the positional relationship of these sensors, and use the fixed points on the powertrain or use the fixed points on it to design brackets to fix the wiring harness. And pay attention to waterproof, heat insulation, heat dissipation, and vibration.

The electrical components of the powertrain are mainly the sensors and actuators on it, including crankshaft position sensor, phase sensor, vehicle speed sensor, knock sensor, water temperature sensor, oil temperature sensor, electronic throttle valve, idle speed control valve, carbon canister solenoid valve, ignition coil, fuel injector, EGR, CBR, eddy current control valve, high-pressure oil pump, pressure-temperature sensor, boost pressure sensor, position switch, reverse switch, etc., on automatic transmissions, multiple sensor interfaces are often integrated.

Dashboard wiring harness assembly

The instrument panel concentrates most of the operation switches and display devices of the whole vehicle and gathers multiple control units. At the same time, the connecting parts of the wiring harness are often designed on both sides of the instrument panel. Therefore, the instrument panel wiring harness is one of the most complex wirings harnesses in the vehicle. one.

In the instrument panel, there are mainly the following electrical components: HVAC, audio system, airbag, instrument electrical box, BCM, ECU, TCU, brake switch, electronic accelerator pedal, clutch switch, cigarette lighter, backup power supply, and various switches components (such as combination switches, alarm switches, etc.).

Indoor wiring harness assembly

The indoor (floor) wiring harness is the longest and largest wiring harness in the entire vehicle. It runs through the entire body and is the first wiring harness to be considered in the design of the entire vehicle. He involves the most body problems and the most vias that need to be considered.

There are relatively few electrical components in the indoor wiring harness, such as electric seats and heating, electronic oil pumps, seat belt switches, rear-wheel speed sensors, corner sensors, etc., but the locations are relatively scattered.

Door harness assembly

The door wiring harness (different for the four doors) is relatively small, and there are relatively few issues to consider, mainly the movement mechanism of the door, the door rubber parts, and fixing.

The main electrical components of the door wiring harness are glass lift switches and motors, electric rearview mirrors, horns, door locks, latches, door sill lights, side turn signals, child safety switches, etc.

Other wiring harnesses

In addition to the above wiring harnesses, there are still some other smaller wiring harnesses on the vehicle, such as battery positive and negative wiring harness, rear defrosting positive and negative wiring harness, roof wiring harness, airbag wiring harness, rear cover wiring harness, etc.

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