Custom OEM Wire Harness Manufacturer for Demanding Electrical Systems
WellPCB is a trusted OEM wire harness manufacturer delivering high quality wiring solutions across automotive, industrial, medical and aerospace sectors.
From engine wire harnesses to complex control assemblies, our harnesses relay power, maintain signal integrity and meet manufacturer specifications across all OEM platforms.
Built to your exact specifications, tested to industry standards and shipped fast.
- UL/IPC-A-620 tested harnesses with 100% continuity and hipot verification up to 1500V
- Custom OEM wire harness configurations with up to 128 circuits and 0.2 to 6.0mm cable insulation ranges
- 21-day prototype lead time including sourcing, crimp force monitoring and AOI validation for full harness builds
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ISO9001 ISO13485
ISO14001
IATF
16949
IPC-A-610H International
Certification
Fully Automated
AOI Inspection
OEM Wire Harness Manufacturer Solutions for Automotive, Industrial and Medical Systems
As a specialized OEM wire harness manufacturer, WellPCB provides custom wiring harness designs and structured, reliable routing of electrical wire and signal conductors across complex systems. From engine controls to embedded sensors, our OEM wiring harnesses control a vehicle’s electrical system and power a wide range of electronic subsystems across original equipment platforms.
Regulatory pressure from bodies such as the EPA, NHTSA and RoHS/REACH continues to drive demand for safer, halogen free and PBTcompliant wire insulation. Organizations such as WHMA, IPC, and SAE International actively shape the evolution of standards, including IPC/WHMA-A-620, the most widely adopted standard for electrical wire harnesses.
WellPCB supports this shift with custom OEM wire harness manufacturing built to meet harness and cable assembly services specifications. Our production meets ISO 9001, IATF 16949 (where necessary) and IPC/WHMA-A-620 certifications for your peace of mind.
WellPCB fabricates OEM wire harnesses using UL-certified wire and cable, automotive grade terminals and sealed connectors and terminals. We support conductor gauges from 10 AWG to 28 AWG, with cable jackets rated up to 150°C and voltage ranges up to 600V.
Our harnesses meet or exceed the wire harness manufacturing industry norms and are engineered to reduce assembly time while improving reliability across critical applications.
Our OEM Wire Harness Manufacturer Capabilities
As an OEM wire harness manufacturer, we process harnesses and OEM cable assembly builds using automated machinery to exact customer requirements, including laser wire stripping and crimp-force monitoring for all terminals.
Supported conductor sizes range from 0.14 mm² to 6 mm² (AWG 28 to 10). Connectors and terminals are sourced from OEM-approved brands, with mating force and pull-force tests validating every termination.
We support jacketed and unjacketed electrical wire in PVC, XLPE, PTFE, FEP and silicone insulation types.
Custom cable builds include coaxial, ribbon, overmolded, shielded, battery cable and RF cable configurations.
Every wire and cable selection is verified for dielectric strength, abrasion resistance and chemical compatibility.
We manufacture automotive wire harness assemblies with ISO 9001 and IATF 16949 compliance.
These include engine bay harnesses, CAN-bus wiring, and OEM harnesses for ADAS, EVs and hybrid platforms.
Harnesses are designed to handle -40°C to +150°C operating ranges, fluid exposure and up to 25 G vibration profiles.
For medical systems, we offer high-quality wire harnesses with low-outgassing jackets, sterilization resistance and miniaturized routing.
In aerospace and robotics, we produce lightweight harnesses with EMI shielding, signal pairing and higher electrical capabilities for servo controls and flight electronics.
All OEM wire harness assemblies undergo 100% electrical testing including continuity, dielectric strength (up to 1500V) and insulation resistance (≥100 MΩ).
Pull tests meet IPC/WHMA-A-620 standards. We also perform AOI, X-ray crimp validation and crimp height verification across all wire harness assemblies.
Our wire harness manufacturing supports batch sizes from 1 prototype to 50,000 units.
We offer 3-week prototyping, and 4 to 5 week production depending on harness complexity, parts availability and cable assembly solutions required.
Labeling, kitting and packaging comply with OEM traceability and inventory systems.
We source from authorized distributors such as Arrow, Avnet, Mouser, Digi-Key and Element14.
This ensures consistent access to verified connector, terminal and cable brands that meet application-specific voltage, temperature and current requirements for every harness or cable system.
Why Choose WellPCB?
Proven OEM Experience
Certified Quality
Cost-Effective Manufacturing
Full Electrical Testing and Compliance Assurance
Global Production and Fast Lead Times
Responsive Technical Support
Industries We Serve with OEM Wire Harnesses
OEM wiring harnesses deliver electrical power, control signals and data across modern platforms. WellPCB supports OEMs in adapting to new technologies, environmental regulations and demand for faster product cycles. Every harness we manufacture is tailored to meet exact performance thresholds for its target operating environment.
Automotive Wire Harnesses
Medical Device Harnesses
Aerospace and Defense Harnessing
Industrial Machinery & Robotics
Consumer Electronics and Embedded Systems
Our OEM Wire Harness Manufacturing Process
Every OEM wire harness manufacturer must balance cost, speed, and compliance. Our workflows comply with industry standards such as IPC/WHMA-A-620 and ISO 9001, ensuring that every harness meets your functional and regulatory expectations.
1. First Quote & Design Review
2. Material Selection
3. Prototyping
4. Manufacturing
5. Testing & Inspection
6. Packaging & Delivery
Standards Our OEM Wire Harnesses Meet
IPC/WHMA-A-620
ISO 9001 & ISO 14001
IATF 16949 for Automotive Harnesses
RoHS & REACH Compliance
UL and CSA Ratings
Customer-Specific Standards
How to Order Your OEM 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
OEM Wire Harness Case Studies
PCB Assembly
This project can be used in various industries such as automotive, aerospace, and industrial machinery, these harnesses ensure that all electrical parts communicate effectively, enabling the proper functioning of the entire system.
They are tailored to fit the exact spatial and electrical requirements of the original equipment, which helps in reducing wiring errors, improving assembly efficiency, and enhancing the overall reliability and performance of the equipment.
PCB Assembly
This is a customized wiring harness for intelligent driving assistance systems, which has high requirements for signal and space adaptation.
We select special conductors, optimize layout, quickly and flexibly produce, with a strict control process and inspection, ensure stable system signals, help vehicles accurately perceive and control.
We demonstrate our strength in OEM customized wiring harnesses.
PCB Assembly
A very important step in OEM manufacturing.
Experienced technicians perform tests according to design requirements, conduct results, judge and record, troubleshoot and repair (if there’s a fault), and then generate a test report.
This report will be used as an important basis for the quality of the wiring harness and will be used for subsequent product delivery and quality traceability.
OEM Wire Harness Manufacturer 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
OEM Wire Harness Manufacturer FAQs
What wire and cable types can you support?
We support high quality wire and custom cable types including PVC, XLPE, FEP, PTFE and silicone insulation. Cable harnesses can include coaxial, ribbon, twisted pair and overmolded cable assemblies. Jacket ratings, current loads and shielding are matched to the application’s electrical wire and signal requirements.
Do you offer custom labeling, kitting, or connector sourcing?
Yes, we provide full custom solutions including barcode or serial labeling, pre-terminated kits, connector mating pairs and bulk packaging. All connectors and terminals are sourced from verified distributors to meet your manufacturer specifications and part traceability requirements.
What’s your minimum/maximum order size?
WellPCB, Trusted OEM Wire Harness Manufacturer
Get $100 Off Your First Order!
Whether you need a single OEM wire harness for prototyping or tens of thousands for production, WellPCB delivers fast, reliable and cost effective wire harness and cable assemblies built to your specifications.
