Wire harness manufacturers offer a wide range of capabilities, from basic assembly to advanced engineering and certifications for specialized industries like aerospace and medical.
The following 10 companies are the leading high-quality wire harness manufacturers in the US. Each one offers different strengths depending on volume requirements, technical complexity and industry specifications.
Cloom Tech ranks as the top overall choice as they combine decades of experience, high-volume production and trusted supplier partnerships, making Cloom Tech a reliable choice. Contact us today for a quote!
Best Overall (Quality & Value)
1. Cloom Tech
Cloom Tech is one of the most established names among wire harness manufacturers in USA, known for reliable production capabilities that support both prototype development and high volume manufacturing (with production capacity reaching 10,000 pieces per hour).
The company operates with 25+ years of manufacturing expertise, with experienced technicians, proven manufacturing processes, industry certifications, extensive testing and fast turnaround times. Everything you need for reliable production of complex, custom wire harnesses.
They also maintain strategic partnerships with major distributors like Future Electronics and Arrow, plus premium connector suppliers including Molex, JST and TE Connectivity. When you work with Cloom Tech, you can have peace of mind knowing your parts are top-quality.
| Pros | Cons |
|---|---|
| ✅ Over 25 years of expertise in wire harness manufacturing. | ❌ No design work offered (although will provide DFM checks and guidance). |
| ✅ Strategic relationships with major distributors and premium connector brands. | |
| ✅ Fast turnaround times for rapid prototyping and mass production. |
Key Specs
| Years of Experience: | 25+ years |
|---|---|
| Factory Specifications: | Production capacity: 10,000 pieces/hour. Wire gauge range: 40AWG-120mm². Automated and semi-automated production lines. |
| Certifications: | ISO 9001, IATF 16949, UL certification, REACH and RoHS EU compliance. |
Runner-Up (Quality & Experience)
2. Elite Harness
Elite Harness is the youngest wire harness manufacturer on this list, but they’re already building a strong reputation in wire harness manufacturing. Their 50,000 square foot facility is equipped with automated printers, welders and advanced testing systems, supported by a team with more than 150 years of combined experience.
What makes Elite unique is their integrated Engineering and Research & Development team, which manages BOM verification, full-scale drawings and durability under heat, cold, moisture and abrasion. Together with their Rapid Response Team for urgent orders and their WHMA membership, Elite offers their customers dependable results for complex applications.
| Pros | Cons |
|---|---|
| ✅ Advanced testing capabilities including evaluation of performance against heat, cold, moisture, abrasion, and more. | ❌ New company without as long a track record as others. |
| ✅ Engineering and Research & Development team that can design wire harnesses for you. | |
| ✅ Active membership in the Wire Harness Manufacturer’s Association (WHMA). |
Key Specs
| Years of Experience: | One year (but comes with a highly experienced team that have over 150 years of combined manufacturing experience). |
|---|---|
| Factory Specifications: | Refurbished 50,000-square-foot manufacturing plant with advanced equipment including automated wire printers and cutters, auto seal and termination tools, sonic welders, protective braiding applicators and advanced testing equipment. |
| Certifications: | ISO 9001:2015, AS9100, ISOQAR certification, WHMA membership. |
Best for Cost-Effective High-Volume Production
3. Wiringo
Wiringo is a long-established China-based wire harness manufacturer known for their consistent quality, competitive pricing and a dependable global supply chain. Their focus on automated processing, strict quality control and broad connector compatibility makes them a practical choice for companies that need steady production without premium-tier pricing.
The company offers a wide range of custom harness assemblies for consumer electronics, industrial equipment and automotive applications, supported by disciplined inspection routines and reliable material sourcing. This combination of scale, stability and accessible engineering support gives OEMs predictable output and solid value across low to high volume projects.
| Pros | Cons |
|---|---|
| ✅ Supports tight-tolerance crimp geometries for applications sensitive to voltage drop and contact resistance. | ❌ Limited specialization in advanced high-speed data harnesses compared with niche engineering-focused suppliers. |
| ✅ Capable of maintaining stable performance across multi-core assemblies with mixed signal and power lines. | |
| ✅ Strong material availability due to established procurement channels, reducing supply-driven schedule risk. |
Key Specs
| Years of Experience: | More than 10 years of experience. |
|---|---|
| Factory Specifications: | Facility in the Optics Valley Science Park, equipped with automated cutting, stripping, crimping and soldering lines. |
| Certifications: | ISO 9001, IATF 16949 and follows IPC/WHMA-A-620, RoHS and UL requirements. |
Best for Custom Engineering Support
4. Precision Cable Assemblies (PCA)
Precision Cable Assemblies is one of the most engineering-focused wire harness manufacturers in the USA, known for their above-and-beyond design support that goes from initial concepts to full production across three manufacturing facilities totaling 100,000 square feet.
Founded in 1980 and specializing in wire harnesses since 1994, PCA features a dedicated engineering department that can work virtually or on-site to help you design the wire harness you need.
Their engineering department brings your ideas to life by turning battery cable and wire harness concepts into 2D prints and 3D models. They make it easy to export the data directly to your CAD template, so there’s little chance of complications when making design changes.
PCA also supports prototype builds in a condensed time frame, handling everything from single circuit simplicity to 300+ circuit complexity.
| Pros | Cons |
|---|---|
| ✅ Can work with you to design your custom wire harnesses, virtually or on-site. | ❌ Limited specialization in high-tech industries. |
| ✅ Can create 2D manufacturing prints and 3D models, and export the data directly to your CAD template. | |
| ✅ Rapid prototyping with comprehensive testing included. |
Key Specs
| Years of Experience: | Founded in 1980, but only added wire harness production in 1994 (31 years ago). |
|---|---|
| Factory Specifications: | 100,000 sq/ft of manufacturing facilities in Brookfield, Wisconsin, Qingdao China, and Monterrey Mexico. |
| Certifications: | ISO 9001:2015 certified (USA/Mexico facilities), IATF 16949:2016 certified (China facility), Quality Management Systems ISO certified since 1999. |
Best for Hi-Tech Applications
5. Amphenol Corporation
You might’ve heard the name Amphenol Corporation before, because they’re one of the world’s most technologically advanced wire harness manufacturers. Established in 1932 and known for developing cutting-edge interconnect solutions that power everything from aerospace systems to medical robotics.
The company specializes in high power wire harnesses with performance up to 1000VDC and 450A through their Voltarius interconnect system, which features proven RADSOK® technology and essential safety features like interlock circuitry.
With operations in more than 60 locations worldwide and high-level expertise across automotive, aerospace, industrial, medical device, and other markets, Amphenol combines almost a century of innovation with advanced manufacturing capabilities.
Their 70,000 square foot facility in San Jose, CA hosts approximately 300+ deeply trained staff members, with highly automated processes. It also maintains industry certifications including ISO 13485:2016 for medical device manufacturing and AS9100 for aerospace applications.
| Pros | Cons |
|---|---|
| ✅ Develops high-power wire harnesses with performance up to 1000VDC and 450A. | ❌ Premium pricing due to advanced capabilities. |
| ✅ Specializes in technologically advanced for applications including aerospace, medical, agricultural, robotics, and more. |
Key Specs
| Years of Experience: | Founded in 1932 (92+ years). |
|---|---|
| Factory Specifications: | Operations in more than 60 locations worldwide, 70,000 square foot facility in San Jose, CA with approximately 300+ deeply trained personnel. |
| Certifications: | ISO9001 and IATF 16949, AS9100 certified facilities, ISO 13485:2016 (medical device manufacturing), MIL-DTL-38999 Series I, II, III. |
Best for Aftermarket Services
6. Matric Group
Matric Group is one of the most comprehensive aftermarket service providers in electronics manufacturing, established with 50+ years of experience and known for extending the life of complex electronics that others can’t or won’t service.
The company provides comprehensive end-to-end aftermarket capabilities including cleaning, inspecting, testing, component-level troubleshooting, recalibrate/recondition/repair, refurbish, remanufacture, and field service. In other words, everything needed to keep critical systems operational once they leave the factory floor.
What makes Matric different is their specialized legacy and third-party product support, with the ability (and willingness) to continue servicing products that are 10 to 20 years old as long as the necessary components are available.
Their factories house fully automatic SMT lines and semi automatic through-hole equipment, with certifications including AS9100D, ISO 9001:2015, ISO 13485:2016 for medical devices, and NADCAP Electronics accreditation.
One of the biggest advantages of Matric is that they deliver cost effective alternatives to complete product replacement while maintaining the highest quality and regulatory standards.
| Pros | Cons |
|---|---|
| ✅ Comprehensive end-to-end aftermarket capabilities including cleaning, inspecting, testing, component-level troubleshooting, recalibrate/recondition/repair, refurbish, remanufacture, and more. | |
| ✅ Specialized legacy and third-party product support for products manufactured elsewhere. | |
| ✅ May be a cost-effective alternative to replacement. |
Key Specs
| Years of Experience: | 50+ years in electronics manufacturing. |
|---|---|
| Factory Specifications: | Fully automatic SMT lines and semi-automatic through-hole equipment. |
| Certifications: | AS9100D and ISO 9001:2015, ISO 13485:2016 (Medical device manufacturing), ISO 14001:2015 (Environmental management), NADCAP Electronics accreditation. |
Best for Industrial Applications
7. Mercury Electronics
Mercury Electronics serves industrial manufacturing businesses with custom electrical assemblies for various industries, including heavy equipment, transportation and HVAC systems. Founded in 1946, the company handles demanding applications where component failure isn’t acceptable.
One of the things that gets them on this list of the top wire harness manufacturers in the USA is that they use high-tech computerized testing capabilities, including open/shorts and high potential testing to verify the performance of their wire harnesses under industrial operating conditions.
The company scales easily from rapid prototypes to high volume production runs with just-in-time delivery. One of their biggest pros is that dedicated account representatives work directly with customers through the entire process, from initial documentation review to final shipment. Their adherence to IPC/WHMA-A-620 standards and First Article Inspection capabilities meet the quality requirements common in industrial OEM applications.
| Pros | Cons |
|---|---|
| ✅ Handles everything from prototype with quick turnaround to low-volume production runs and multiple high-volume production runs. | ❌ Limited online presence and company transparency. |
| ✅ Ability to perform computerized open/shorts and high potential testing. | |
| ✅ Dedicated account representatives work closely with customers. |
Key Specs
| Years of Experience: | Founded in 1946 (78+ years of experience in electronics manufacturing). |
|---|---|
| Factory Specifications: | Capable of handling cable assemblies, wire harnesses, and wiring of enclosures Quality team capable of First Article Inspection (FAI) and Production Part Approval Process (PPAP). |
| Certifications: | Adheres to IPC/WHMA-A-620 requirements for cable and wire harness assemblies, quality policies modeled after ISO requirements, Certificates of Compliance available. |
Best For Flexible Global Production
8. Cypress Industries
Cypress Industries operates wholly-owned manufacturing facilities across four countries: Austin Texas, Mexico, India and China. While headquartering wire harness manufacturers in the USA is always a pro, this multi-continent approach allows customers to optimize production costs and avoid supply chain disruptions.
The company’s vertically integrated structure handles everything from PCBAs and sheet metal fabrication to wire harnesses and plastic injection molding. Their facilities maintain ISO 9001:2015 certification (with ISO/TS 16949 automotive certification in China) and ITAR certification for secure manufacturing. Customers can design in the US and manufacture in any location, or split production across multiple facilities based on cost requirements and delivery needs.
| Pros | Cons |
|---|---|
| ✅ Multi-continent manufacturing footprint with manufacturing facilities in Austin Texas, Mexico, India and China. | ❌ Operations in multiple countries expose the company to various trade policies, tariffs and regional political risks. |
| ✅ Global, vertically-integrated contract manufacturer offering various wire harness and cable assembly services. |
Key Specs
| Years of Experience: | Unclear. |
|---|---|
| Factory Specifications: | Austin, Texas headquarters and manufacturing. |
| Certifications: | ISO 9001:2015 certified manufacturing facilities, ITAR-certified for secure manufacturing. |
Best for Flexible Volume Production
9. Star Engineering
Star Engineering operates from a single 16,000 square foot facility in North Attleboro, Massachusetts with two high-speed SMT lines and a standalone prototype system. This setup enables everything from low to medium volume runs with quick changeover capability between different products.
The company’s in-house manufacturing approach eliminates external dependencies for PCB assembly, cable assembly and electro-mechanical builds. Their ISO 9001:2015 certified facility includes AOI inspection equipment, BGA rework stations and segregated RoHS/non-RoHS manufacturing lines.
| Pros | Cons |
|---|---|
| ✅ High-mix low to medium volume runs with rapid changeover capability. | ❌ Being a single location manufacturer may result in longer lead times and higher shipping costs for customers outside the Northeast region. |
| ✅ Easily handle everything from prototyping to production with custom requirements. | |
| ✅ All manufacturing done in house, allowing them to reduce production and delivery costs. |
Key Specs
| Years of Experience: | Founded in 1980 (45+ years of experience). |
|---|---|
| Factory Specifications: | 16,000 sq ft facility in North Attleboro, Massachusetts featuring dual high-speed Assembleon surface mount lines, dedicated prototype assembly system, automated optical inspection capabilities, ball grid array repair equipment, water-based cleaning systems, separate RoHS-compliant and leaded production areas, encapsulation and protective coating services. |
| Certifications: | ISO 9001:2015 certified Quality Management System, UL508A, ITAR registered, UL & CSA certified, ESD controlled processes. |
Best for Advanced Manufacturing Technology
10. American Precision Assemblers (APA)
American Precision Assemblers operates facilities in Illinois, Minnesota and Mexico with ISO 9001:2015 certification across all locations. The company handles things like ultrasonic wire welding, automated crimping, and terminal application through uniform manufacturing systems.
Their Duluth facility maintains AS9100D certification for aviation applications, while all plants follow IPC/WHMA-A-620 and IPC/JSTD001D standards. This allows them to serve various industries, including aerospace, industrial, and commercial.
Interestingly, the company recently installed bi-facial solar panels providing over 100% energy offset at their Hampshire headquarters, with plans to implement renewable energy across their other facilities too.
| Pros | Cons |
|---|---|
| ✅ Multiple ISO-certified high-tech facilities. | ❌ Managing advanced manufacturing processes across multiple locations could create consistency challenges. |
| ✅ Comprehensive manufacturing processes including crimping, cutting, coiling, connecting, and more. | |
| ✅ Advanced sustainability technology integration. |
Key Specs
| Years of Experience: | Nearly three decades (founded around 1995). |
|---|---|
| Factory Specifications: | Multiple facilities: Hampshire IL (headquarters), Normal IL, Hermosillo Mexico, Duluth MN, warehouse in Nogales A, 20,000+ square feet of production space across facilities. |
| Certifications: | ISO 9001:2015 (all facilities since 1996, continuous certification), AS9100D (aviation facility in Duluth), IPC/WHMA-A-620 and IPC/JSTD001D standards compliance, UL listed. |
Best for Custom Design Solutions
11. Meridian Cable Assemblies
Meridian Cable Assemblies operates facilities in St Augustine Florida. The company designs over 70% of products in-house with capabilities including custom extrusion, insert molding and ultrasonic welding. They have access to over 5,000 existing tools for connectors and overmolds, giving them an advantage over other companies when it comes to design.
The company provides full lifecycle services from prototyping through volume manufacturing with 100% testing for continuity, integrity, polarity and functionality. Their Advanced Life Testing Lab conducts qualification testing and process validation before any part leaves the factory.
| Pros | Cons |
|---|---|
| ✅Comprehensive custom design capabilities with over 70% of products designed in-house. | ❌ Smaller facility may constrain capacity for large volume orders compared to competitors with larger operations. |
| ✅ Operations in St Augustine Florida and Tanggu China provide global supply platform. | |
| ✅ 100% testing for continuity, integrity polarity and functionality plus Advanced Life Testing Lab for qualification testing and process validation. |
Key Specs
| Years of Experience: | Founded in 1994 (30+ years of experience). |
|---|---|
| Factory Specifications: | St Augustine Florida: 7,000 square feet facility for design, testing, building and distribution, Advanced Life Testing Lab for qualification testing, KanBan and just-in-time distribution systems. |
| Certifications: | ISO 9001:2015 certified (maintained since 2000), UL-approved wire and cable extruder and manufacturing facility, IPC/WHMA-A-620 standards. |
Best Wire Harness Manufacturers in USA: Final Thoughts
Choosing the right leading manufacturer depends on specific project requirements including volume, complexity and industry standards. Companies like Cloom Tech and Elite Harness excel in comprehensive production capabilities, while others specialize in areas like custom engineering support or aftermarket services.
Whether you need basic wire harnesses and custom cable assemblies or complex wiring solutions with specialized certifications, these manufacturers provide the capabilities and experience necessary for reliable production across diverse industrial applications.
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