Custom Automotive Wire Harness Manufacturer

Yihetai is a professional custom Automotive wire harness manufacturer in China, providing reliable wiring and cable assembly solutions for vehicle power, signal, lighting, control and electronic connection systems. As an experienced wire harness manufacturer, custom cable assembly partner and cable assembly supplier, we manufacture automotive harnesses according to customer drawings, samples, BOM lists or application requirements.

Our custom Automotive wire harness solutions can be designed with different wire gauges, cable lengths, connector types, terminal types, insulation materials, protective sleeves, shielding, waterproof structures, labels, colors and branch layouts. Whether you need a simple two-wire automotive connector cable, a multi-branch vehicle wiring loom, an OEM wire harness for electronic modules, or a customized cable assembly for new energy vehicles, Yihetai can support both prototype development and volume production.

Our automotive wire harness products are widely used in vehicle lighting, sensors, control panels, gear controllers, battery systems, pack sampling, in-car electronics, commercial vehicles, motorcycles, charging equipment and other automotive electronic systems. With more than 23 years of wiring harness experience, ISO 9001:2015 quality management, UL certification and IATF 16949 certification, Yihetai helps customers receive stable, cost-effective and ready-to-install custom wiring solutions.

Looking for a reliable automotive wiring harness factory in China? Send us your drawing, sample or technical requirement, and our engineering team will review your project and provide a fast quotation.

What Is an Automotive Wire Harness?

An automotive wire harness is a customized electrical wiring assembly designed to organize and connect multiple electrical circuits within a vehicle or automotive device. It combines wires, terminals, connectors, protective sleeves, tapes, conduits, and overmolded components into a complete wiring system for power and signal transmission.

Compared with loose wires or standard cable products, a custom automotive wire harness can better fit the vehicle layout, reduce installation time, improve wiring accuracy and protect cables from vibration, abrasion, moisture, heat and electrical interference. Automotive harnesses are widely used in cars, motorcycles, trucks, electric vehicles, charging equipment, automotive lighting, control systems, sensors, battery systems and aftermarket electronic devices.

For engineers and purchasing teams, the key point is not only whether a wiring harness factory can assemble wires, but whether it can understand connector matching, crimping quality, wire routing, material selection, testing requirements and batch consistency. Yihetai focuses on custom-made automotive cable assemblies designed according to real installation conditions and customer-specific performance requirements.

Common Custom Automotive Wire Harness Types We Manufacture

Yihetai manufactures a wide range of custom automotive wiring harness and cable assembly products, including:

Automotive lighting wire harness for headlights, tail lights, fog lights, atmosphere lights and LED lighting modules
Automotive sensor wire harness for signal transmission, detection systems and electronic control units
Gear controller wiring harness for vehicle control and transmission-related electronic systems
Battery pack sampling harness for new energy vehicles, energy storage and battery monitoring systems
High and low voltage vehicle wire harness for EV and hybrid vehicle applications
Automotive switch wire harness for control panels, rocker switches and dashboard components
Automotive power supply wire harness for DC power distribution and electrical modules
Waterproof automotive connector cable assembly with sealed connectors and protective sleeves
OBD cable and diagnostic cable assembly for vehicle testing and communication equipment
Custom OEM wire harness for automotive electronics, motorcycles, trucks and special vehicles

We can also support connector matching for brands and equivalent parts such as TE Connectivity, Molex, JST, Deutsch-style connectors, Sumitomo-style connectors, Yazaki-style connectors and other customer-specified connector systems.

Key Features of Our Automotive Wire Harness

Custom wire lengths, branch layouts and connector configurations based on customer drawings or samples
Compatible with TE, Molex, JST, Deutsch, AMP, Hirose,Yazaki and equivalent connector brands
Available with PVC, XLPE, TPE, PTFE, silicone and other insulation materials
Supports power transmission, signal transmission, sensor connection and control system wiring
High-quality terminal crimping, soldering, ultrasonic welding, sleeving and assembly process
Optional waterproof connectors, heat-shrink tubing, braided sleeving and protective conduit
Suitable for vibration, moisture, heat, abrasion and demanding automotive working environments
High-voltage support up to 1000V for EV/hybrid applications
100% electrical testing before shipment to ensure stable and reliable connection performance

Technical Specifications

Item	Available Options
Product Name	Custom Automotive Wire Harness / Automotive Cable Assembly
Wire Gauge	8AWG–24AWG, or customized according to current and application
Cable Type	Single wire, multi-core cable, flat cable, shielded cable, high-temperature wire, EV cable
Conductor	Bare copper, tinned copper, stranded copper, customer-specified conductor
Connector Type	TE, Molex, JST, Deutsch-style, Sumitomo-style, Yazaki-style, waterproof automotive connectors, equivalent connectors
Terminal Type	Crimp terminal, ring terminal, spade terminal, Faston terminal, bullet terminal, quick disconnect terminal
Insulation Material	PVC, XLPE, PE, PP, TPE, silicone, PTFE or customized material
Jacket / Protection	PVC jacket, corrugated tube, braided sleeve, heat shrink tube, tape wrapping, overmolding
Temperature Range	Commonly -40°C to +105°C; higher temperature options available by material selection
Voltage Rating	12V, 24V, 48V, 60V, 300V, 600V or customized according to application
Waterproof Level	Optional sealed connector, waterproof plug, heat shrink sealing or overmolding
Color	Black, red, yellow, blue, green, white, gray or customized color coding
Length	Fully customized according to drawing, sample or installation requirement
Labeling	Cable label, connector label, circuit number label, customer logo label
Testing	Continuity test, wire sequence test, insulation resistance test, high-voltage test, pull test
Production Type	Prototype, small batch, OEM production and mass production

Applications

Our Automotive wire harness solutions are widely used in industrial vehicle systems, consumer vehicle electronics and special equipment applications.

Automotive electronic control systems
Vehicle control panels and switch modules
Gear controller wiring harness
Engine peripheral electrical connections
Battery pack sampling harness
New energy vehicle battery systems
Charging pile and EV power connection systems
Commercial vehicle electrical systems
Agricultural machinery and construction vehicle wiring
Forklift, truck and special-purpose vehicle harnesses
Car headlight and tail light wiring harness
Atmosphere light and LED lighting harness
Dashboard and interior electronic harness

Car audio and entertainment system cable assembly
Door control, seat control and mirror control harness
Sensor wire harness for parking, temperature and signal detection
Motorcycle and electric scooter wiring harness
Automotive aftermarket electronic accessories
Diagnostic OBD cable assembly
Motorsport and modified vehicle wiring loom
Battery management system wiring harness
High-temperature automotive cable assembly
Waterproof outdoor vehicle connector cable
Emergency vehicle electronic wiring
Communication and monitoring equipment used in vehicles
Custom wiring solution for EV, energy storage and intelligent mobility systems

Customization Options

At Yihetai, all Automotive wire harness products can be customized according to customer requirements.

Custom Item	Available Options	Notes
Wire Type	Single wire, multicore cable, shielded cable, flat cable, high-voltage cable	Selected by power, signal or data requirement
Conductor	Bare copper, tinned copper, stranded copper	Customized according to flexibility and current load
Wire Gauge	8 AWG to 24 AWG or customized	Based on current, voltage and installation space
Length	Fully customized	Available for short jumpers and complex long harnesses
Color	Black, red, white, yellow, blue, green or customized	Supports color coding for easy assembly
Connector	TE, Molex, JST, Deutsch, Yazaki, AMP or equivalent	We can help match connector alternatives
Terminal	Ring, spade, blade, bullet, Faston, pin, socket terminal	Crimping quality controlled by pull force testing
Jacket Material	PVC, TPE, silicone, XLPE, PTFE, PE, PP	Selected by temperature and environmental requirement
Protection	Corrugated tube, braided sleeve, tape, heat shrink, PVC tube	Improves abrasion, vibration and moisture resistance
Process	Cutting, stripping, crimping, soldering, ultrasonic welding, overmolding	Depends on harness structure and application
Labeling	Wire labels, heat-shrink labels, barcode labels	Supports traceability and assembly identification
Testing	Continuity, Hi-Pot, insulation resistance, pull test, dimension check	100% electrical testing before shipment

We can manufacture based on customer drawings, samples, BOM lists, connector part numbers or application requirements.

Send us your drawing, sample or specification for a fast quotation

Manufacturing Capability

As a trusted wiring harness factory and cable assembly manufacturer, Yihetai uses automated cutting, crimping, and assembly lines for high-volume automotive wire harness production. Our 5,000 sqm facility handles 100,000+ units monthly, from prototypes to OEM runs, with full traceability via ERP systems.

From material selection to final assembly and testing, all processes follow IATF 16949 standards for zero defects. Typical lead time for prototypes is 5-7 days, mass production 3-4 weeks ensuring on time delivery for your custom wiring solution.

Quality Assurance & Control

Yihetai implements full-process quality control with documented systems from incoming inspection to final outgoing audit, traceability via ERP, and zero-defect goals for every custom wire harness. We hold ISO 9001:2015, UL, and IATF 16949 certifications, ensuring automotive-grade compliance for global OEMs.

Quality inspection items include:

Incoming material inspection
Wire specification and insulation check
Terminal crimp height and width inspection
Terminal crimp pull force test
Connector position and wire sequence check
Visual and continuity check
Short circuit and open circuit test
High-voltage test
Insulation resistance test
Dimensional and fixture inspection
Labeling and packaging inspection
Every harness is delivered with guaranteed electrical integrity and consistent quality across batches.

Why Choose Yihetai

25+ years of custom wire harness expertise serving automotive, industrial, renewable energy, medical, lighting, and smart automation industries worldwide

Strong engineering support for custom design, drawing review, BOM analysis, and connector matching, helping customers optimize manufacturability and find suitable alternatives

OEM and ODM wire harness manufacturing support from prototype development and small-batch production to high-volume custom cable assembly projects

In-house wire processing and assembly capability covering cutting, stripping, crimping, soldering, bundling, injection molding, and testing under one quality system

100% electrical testing and full traceability for every wire harness, including continuity, wire sequence, insulation, and high-voltage reliability testing before shipment

Competitive pricing and flexible lead times from a China-based wire harness factory, helping customers reduce sourcing costs while maintaining reliable quality and fast response

Frequently Asked Questions

Can Yihetai manufacture an Automotive wire harness according to my drawing?

Yes. Yihetai can manufacture custom Automotive wire harness products according to your 2D drawings, 3D installation layout, electrical schematic, BOM list, connector part numbers or physical samples. If your design is still under development, our engineering team can also help review wire gauge, connector selection, terminal type, protection method and assembly process to improve manufacturability.

What information should I provide for a fast quotation?

For a fast quotation, please send wire gauge, cable length, connector model, terminal type, circuit diagram, quantity, material requirement, voltage/current rating, working temperature and any special requirements such as waterproofing, shielding, labeling or protective sleeves. If you do not have complete technical files, you can send samples or application photos, and we will help evaluate the custom wiring solution.

Can you support both prototype and mass production?

Yes. Yihetai supports prototype samples, small-batch trial orders and mass production for automotive wire harness and custom cable assembly projects. Prototype lead time is usually around 5-7 days after technical confirmation and material availability. For mass production, delivery time is normally 3-4 weeks depending on quantity, material sourcing and product complexity.

What automotive connector brands or types can you work with?

We can work with many automotive connector types, including TE, Molex, JST, Deutsch-style, Sumitomo-style, Yazaki-style, waterproof plugs, sealed connectors, board connectors, ring terminals, Faston terminals and other customer-specified connector systems. If your original connector is hard to source, our engineering team can help check compatible alternatives based on electrical and mechanical requirements.

How do you ensure the quality of automotive wiring harnesses?

Yihetai controls quality from incoming materials to final shipment. We inspect wire, terminals and connectors, control cutting and stripping dimensions, check terminal crimping quality, perform pull tests, verify connector assembly, and conduct 100% electrical testing before delivery. Depending on the project, we can also perform insulation resistance, high-voltage, dimensional and fixture inspections to ensure stable batch quality.

Looking for a reliable Automotive wire harness manufacturer?

Send us your drawing, sample or technical requirements, and Yihetai will provide a customized wire harness or cable assembly solution for your project.