Precision-Engineered Custom
Wire Harnesses from China
As a China custom wire harness supplier, we provide professional manufacturing and full assembly for both prototype and large volume requirements.
Our facilities in China deliver fully customized cable and wire harness assembly builds that match your specifications with precise workmanship, complete documentation and consistent production quality.
- ISO 9001, IATF 16949 & IPC/WHMA-A-620 Class 3 compliant production
- Rapid prototyping for testing and no minimum order quantity
- Genuine connectors (Molex, JST, TE, Delphi) and UL-listed wire for high-quality assemblies
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ISO9001 ISO13485
ISO14001
IATF
16949
IPC-A-610H International
Certification
Fully Automated
AOI Inspection
What Is a Custom Wire Harness?
A custom wire harness is a tailored wiring system designed to route power and signals through organized conductors, wire and cable, protective jackets, connectors and terminals. It ensures mechanical stability, electrical reliability and simplified installation within complex equipment.
Custom wire harness solutions are manufactured to match specific wire gauge requirements, connector types, environmental ratings and circuit layouts. Each harness is built for precise integration into automotive platforms, industrial machines, medical devices, telecom hardware and other OEM systems.
Our China Custom Wire Harness Capabilities
Our engineering team performs full DFM checks, validating routing paths, bend radii, connector compatibility and insulation requirements for harsh environments.
Wire options, materials and components include UL-listed styles (1007, 1015, 1569, 1061), multi-core cables, and tinned-copper conductors with PVC, XLPE, TPE or silicone insulation. We support connector families from Molex, TE, JST, Amphenol, Deutsch and more.
Automated cut-strip-crimp systems ensure wire harness production accuracy. Processes include ultrasonic welding, overmolding, soldering to Class 3 standards, braiding and custom labeling.
We support wire-to-board, wire-to-wire, socket and power connectors, as well as Faston, ring, spade, ferrule, sealed and unsealed terminals and HV connectors for EV/energy applications.
Options for cable and wire harness protection include braided sleeving, PVC tubing, heat-shrink, conduit, IP-rated sealing, EMI shielding and overmolded strain relief.
All wire harnesses undergo 100% continuity testing, Hi-Pot up to 1500 V, pull-force validation, insulation resistance checks and visual inspection to Class 3 standards.
Our manufacturing complies with ISO 9001, IATF 16949, IPC/WHMA-A-620 Class 3, RoHS, and REACH standards. We exclusively use UL-traceable wire to ensure material quality.
Prototypes take 2 to 3 weeks and mass production 4 to 5 weeks. No minimum order quantities.
Why Choose WellPCB for China Custom Wire Harness Manufacturing?
We have more than 15 years of experience in wire harness manufacturing and cable assembly production. Our China custom wire harness operations have produced more than one million assemblies for OEM customers across automotive, industrial equipment, medical systems and consumer electronics.
Built-to-Spec Manufacturing
Every custom wire harness is produced directly from your drawings, CAD data, 3D models, BOMs or physical samples.
Our engineering team verifies conductor layout, connector selection, wire gauge, environmental protection and routing profiles to ensure the finished assembly fits your application exactly as intended.
Class 3 Workmanship
All wiring harnesses follow IPC WHMA A 620 Class 3 workmanship criteria.
These standards define the highest reliability requirements used in aerospace, medical, automotive and industrial environments.
Fast Prototyping
Our China custom wire harness factory delivers prototype assemblies in as little as 2 to 3 weeks.
This is significantly faster than most harness manufacturers in China, which typically require 8 to 12 weeks.
Full Traceability
Every component used in your wire harness is documented, including wire type, conductor source, connector series, terminal style, lot numbers and inspection reports.
All assemblies include serialized labeling and complete production records to support quality audits and future repeat builds.
Global Engineering Insight
Our engineering team supports diverse industries and understands the unique requirements of various industries.
We customize wire and cable harnesses for temperature exposure, vibration, chemical resistance, EMI shielding and connector compatibility.
Worldwide Delivery
We ship custom wiring harness solutions to customers throughout North America, Europe, Australia and Asia.
Packaging, export documentation, and logistics planning are managed to ensure safe delivery of cable assemblies.
Types of Custom Wire Harnesses We Manufacture
Our China custom wire harness factory supports a wide range of industries with engineered harness solutions built for specific electrical, mechanical and environmental requirements.
Automotive and EV Wire Harnesses
High voltage wire assemblies for EV platforms, battery connectors, sensor networks, control modules, engine management systems and vehicle wire harness integration with OEM grade terminals and protective sleeving.
Industrial Equipment Wire Harnesses
Custom wire harness solutions for robotics, HVAC systems, industrial pumps, PLC controls, machine tools and automation equipment. Built with durable insulation, robust connectors and precise conductor routing.
Medical Device Wire Harnesses
Low profile medical wire harness assemblies built with sterilizable insulation materials, EMI shielding, secure crimped terminals and IPC Class 3 workmanship suitable for diagnostic and surgical equipment.
Telecom and Networking Harnesses
Harness assemblies for telecom equipment, signal routing, RF coax cable assemblies, low loss shielding structures and high cycle connectors used in communication and networking systems.
Consumer Electronics Wire Harnesses
Compact, multi-branch wire configurations for IoT devices, wearable technology, smart home products and compact PCB based electronics requiring precise connector orientation and clean cabling layouts.
Cables Used in Custom Wire Harnesses
Our China custom wire harness factory uses a wide range of wire and cable types to meet specific electrical loads, environmental conditions, connector interfaces and compliance requirements.
UL Hook-Up Wire
UL 1007, UL 1015, UL 1569 and UL 1061 hook up wire with tinned copper conductors and PVC insulation, commonly used for internal wiring, control circuits and PCB connections.
Multi-Core and Shielded Cables
Multi core cable constructions with foil or braided shielding for EMI sensitive applications. Ideal for automation systems, sensors and communication lines requiring stable signal integrity.
LV and HV EV Cables
Low voltage and high voltage EV cables built with XLPE, silicone or TPE insulation. Rated for up to 1500 volts and designed for thermal resistance, flexibility and secure connector engagement in electric vehicle platforms.
Coaxial & RF Cables
Coax and RF cable options for data transmission, control signals and RF communication circuits. Built with precise impedance control and low loss dielectric materials.
Fiber Optic Cables
Fiber optic cables immune to EMI and designed for long distance, high speed control and data communication. Ideal for telecom and networking.
Custom Wire Harness Technical Specifications
| Parameter | Specification Range |
|---|---|
| Wire Gauge | 10 to 30 AWG |
| Voltage Rating | Up to 1500 V |
| Temperature | -40°C to +150°C |
| Wire Styles | UL 1007/1015/1569/1061 |
| Insulation | PVC, TPE, XLPE, Silicone |
| Testing | Continuity, Hi-Pot, Pull |
| Mating Cycles | 100 to 1000+ |
| Certifications | ISO, IATF, IPC Class 3 |
How to Order Your China Custom Wire Harness
Submit Your Design
Send us your design details (Drawing or Detailed Specifications).
Get a Fast Quote
Once your design and specs are received, a fast quote will be sent to you within 24 hours.
Confirm Order & Make Payment
When the quotation is approved, please send the PO or order confirmation, we will proceed with the production after receiving your payment.
Arrange Production & Inspection
Before production, our technical team will review all details of the drawing/specs again. If everything is OK, the order will start. We'll keep you updated throughout the manufacturing process. After the production is completed, the products will be 100% inspected.
Packaging & Delivery
When completed, your order will be carefully packed and shipped to you, with shipping documents and tracking information provided.
WellPCB is trusted by millions of
businesses and innovators.
Why Choose WellPCB as Your Wire Harness Manufacturer?
WellPCB stands out among USA wire harness manufacturers by delivering superior quality, advanced solutions, and unmatched reliability. With years of experience serving global markets, WellPCB has earned a reputation as one of the top wire harness manufacturers in the USA.
WellPCB specializes in custom wire harnesses for complex electronic and industrial applications. You can order these assemblies with $100 off using our special offer—delivering high-quality, tailor-made harnesses at competitive rates for your most demanding projects.
Hommer Zhao
Founder and Chief Editor – Hommer Zhao
Welcome! I’m Hommer Zhao, the founder and Chief Editor of WellPCB. With years of experience in the PCB industry, I’m committed to making sure our content is both accurate and helpful. We’re proud to serve a growing community of over 4,000 customers worldwide, and our goal is to provide you with the best resources and support. Your satisfaction is our top priority, and we’re here to help you every step of the way!
Jesse Holland
Technical Manager – Jesse Holland
Hi, I’m Jesse Holland, an Engineer and Technical Manager at WellPCB. With years of experience in PCB design and engineering, I’m here to ensure that every project we work on meets the highest technical standards. I lead our team, focusing on precision and innovation, collaborating closely with clients to provide tailored solutions and expert guidance. Whether you’re facing a complex design challenge or need advice on technical aspects, I’m here to ensure your project is a success from start to finish.
Nathan Jensen
Purchasing Manager – Nathan Jensen
Hi, I’m Nathan Jenson, the Purchasing Manager at WellPCB. I’m responsible for sourcing the best materials and components to ensure our products meet the highest quality standards. With my extensive experience in procurement, I work closely with suppliers to secure reliable and cost-effective solutions while maintaining strong relationships to support our operations. I aim to ensure every project runs smoothly by providing the resources needed to deliver on time and to your satisfaction.
Emma
Sales Manager – Emma
Hey, I am Emma, sales manager at WellPCB. I studied electronic science and technology at university and have served customers for PCB and PCB Assembly service for several years.

I enjoy communicating with customers and our technicians to solve problems, and customers always say, "It's great to have you onboard".

It is my pleasure and honour to be helpful. Contact me now, and you'll know.
Bella and Cassiel
Sales Representatives – Bella and Cassiel
We’re Bella and Cassiel, your dedicated sales representatives at WellPCB. With our extensive knowledge of the PCB industry, we’re here to provide exceptional service and support. We take the time to understand your unique needs and are always ready to offer tailored solutions and advice. Whether you need product recommendations, assistance with your orders, or simply have a question, we’re here to ensure your experience is smooth and seamless at every step.
Mandy and Wendy
Sales Representatives – Mandy and Wendy
We’re Mandy and Wendy, your friendly sales representatives at WellPCB. Passionate about helping our customers, we bring a wealth of experience in the PCB industry to provide you with the best solutions and service. We take pride in building strong relationships with our clients, understanding their specific needs, and offering personalised support to ensure their satisfaction. Whether you’re looking for advice, product information, or assistance with any part of your order, we’re here to make your experience as smooth and efficient as possible.
Our Team
Our skilled engineers and technicians bring expertise and precision to every PCB assembly project. Committed to quality, efficiency, and innovation, our team ensures every order meets the highest UL, IPC, ROHS & REACH standards, delivering reliable solutions tailored to your needs.
- Founder and Chief Editor – Hommer Zhao
- Technical Manager – Jesse Holland
- Purchasing Manager – Nathan Jensen
- Sales Manager – Emma
- Sales Representatives – Bella and Cassiel
- Sales Representatives – Mandy and Wendy
Prototype Wire Harness Case Studies
PCB Assembly
The picture shows an HDMI-to-DVI cable with USB power. It can be used to connect HDMI-enabled devices (such as laptops and TV boxes) to DVI-equipped monitors and other home appliances.
Advantages:
- •Strong Compatibility: Allows connection between devices with different interface standards, expanding their use cases.
- •Stable Transmission: Provides stable video signal transmission, minimizing interference and loss during signal transmission.
- •Convenient Power Supply: No need to find a separate power source, making it more convenient to use.
PCB Assembly
The picture shows an HDMI-to-DVI cable with USB power. It can be used to connect HDMI-enabled devices (such as laptops and TV boxes) to DVI-equipped monitors and other home appliances.
Advantages:
- •Strong Compatibility: Allows connection between devices with different interface standards, expanding their use cases.
- •Stable Transmission: Provides stable video signal transmission, minimizing interference and loss during signal transmission.
- •Convenient Power Supply: No need to find a separate power source, making it more convenient to use.
PCB Assembly
The picture shows an HDMI-to-DVI cable with USB power. It can be used to connect HDMI-enabled devices (such as laptops and TV boxes) to DVI-equipped monitors and other home appliances.
Advantages:
- •Strong Compatibility: Allows connection between devices with different interface standards, expanding their use cases.
- •Stable Transmission: Provides stable video signal transmission, minimizing interference and loss during signal transmission.
- •Convenient Power Supply: No need to find a separate power source, making it more convenient to use.
China Custom Wire Harness Client Feedback
As an R&D manager, I have had an outstanding experience working with WELL-PCB. For many years, our company has entrusted them with the production, assembly, and programming of the boards developed in our R&D unit, and they have consistently exceeded our expectations.
Hamid Reza Moshayedi
R&D Manager
Their work is very impressively perfect. Today, when they check our company PCB board after assemble. They found a fake short point which many engineers has never found in the past years. But that is just designed so. The PCB board quality is excellent. Their service is also excellent.
MikeZ
My friend introduced WellPCB to me, the first try, a little look forward to. I ordered a 47*72 10ps PCB, and I can’t wait to receive my PCB. So I used expedited service and received my PCB in three days. I tested and soldered the PCB, Quality is really good, silkscreen, plating also great.
Warren Cliton
China Custom Wire Harness FAQs
Do you support waterproof or sealed harnesses?
Yes, we manufacture sealed cable harness assemblies using overmolding, adhesive lined heat shrink, gasketed connectors, O ring interfaces and potting compounds to achieve waterproofing and environmental protection.
What documents do I need to request a quote?
You can submit drawings, wiring diagrams, BOMs, 3D files, photos or a physical sample. If documentation is incomplete, our team can assist with connector identification, wire type selection and layout reconstruction.
Do you offer labeling, serialization and custom identification?
Yes, we support barcode labeling, heat shrink printing, QR codes, custom tags, and serialized numbering for traceability, inventory control and OEM production tracking.
Built-to-Spec China Custom Wire Harness Manufacturing
Get $100 Off Your First Order!
Whether you need a single prototype or large-scale production, WellPCB delivers fully verified wire harness solutions with Class 3 workmanship, documentation and global delivery.
