Top 10 Truck Wire Harness Manufacturers USA 2025

The commercial trucking industry relies heavily on sophisticated electrical systems to power everything from basic lighting and ignition to advanced telematics and safety features. Behind these critical systems are specialized wire harnesses that serve as the nervous system of modern trucks. In 2025, the demand for reliable truck wiring harness solutions continues to grow as vehicles become more electronically advanced.

Understanding the Truck Wire Harness Market

The truck wire harness industry in the United States represents a crucial segment of the automotive electrical systems market. Wire harnesses are organized bundles of wires, terminals, and connectors that transmit electrical power and signals throughout heavy-duty vehicles. These assemblies serve as the lifelines that connect various electrical components, from engine management systems to lighting, braking, and communication systems.The wire harness manufacturing industry in the United States currently comprises 271 manufacturers employing over 15,494 workers, with the sector demonstrating remarkable export strength as 38% of companies report international distribution. The global wire harness market was valued at $103.59 billion in 2025 and is projected to exceed $147 billion by 2034, growing at a CAGR of 4%.

Top 10 Truck Wire Harness Manufacturers in the USA

1. Cloom Tech

Business Name: Cloom Tech
 Spokesperson: Ivy Zhao (Spokesperson)
 Phone: +1 863 434 8447
 Email: sales@cloomtech.com
 Website: https://cloomtech.com/
 Address: 9251 NW 112th Ave, Medley, FL 33178, USAServices: Cloom Tech specializes in manufacturing custom wire harnesses and cable assemblies for various industries, including automotive, robotics, medical devices, and aerospace. Their services encompass design support from prototype to production, ensuring high-quality, durable, and reliable wiring solutions tailored to meet unique project requirements.Cloom Tech stands out as a specialized manufacturer focusing on custom truck wire harnesses and cable assemblies for various industries, including automotive and heavy-duty truck applications. The company has demonstrated exceptional capability in meeting demanding automotive requirements, as evidenced by their recent project with a large automotive manufacturer where they delivered 10,000 units of custom automotive wire harnesses with rapid prototyping in 7 days and mass production completion in 15-20 days.Key Strengths:

• Rapid prototyping capabilities
• High-precision harnesses for both high and low-voltage applications
• Custom engineering for specific requirements including shielding, tensile strength, and flexibility
• Proven track record with major automotive manufacturers

2. Omega Leads Inc.

Location: Santa Monica, California
 Founded: 1961
 Employees: 50+Omega Leads has established itself as a leading wire harness manufacturer with over 55 years of experience in the industry. The company has evolved from its humble beginnings in a San Fernando Valley garage to become a premier cable assembly and wire harness manufacturer. Founded by two friends with extensive coil manufacturing experience, Omega Leads shifted its focus to wire harness assemblies in 1974 under new ownership.Key Strengths:

• Over 55 years of industry experience
• State-of-the-art, computer-controlled, robotic equipment
• IPC/WHMA-A-620 quality standards compliance
• Complete turnkey solutions from design to production
• Extensive inventory enabling custom manufacturing capabilities

3. Buckeye Electrical Products Inc.

Location: Botkins, Ohio
 Founded: 2011
 Employees: 51-200Buckeye Electrical is a family-owned manufacturer specializing in custom wire harness and cable assemblies. The company has made significant investments in advanced equipment to enhance production capabilities, including Schleuniger's MultiStrip 9480 and PowerStrip 9580 cut and strip machines. This modernization has enabled them to process approximately 12 million feet of wire annually.Key Strengths:

• Family-owned operation with over 25 years of experience
• Advanced automated equipment for high-volume production
• Processes 8-18 gauge hook-up wire, coax, multiconductor, and battery cable
• Quality control focus with modern manufacturing capabilities
• Custom assemblies, wire harnesses, battery cables, and coil winding services

4. Molex LLC

Location: Multiple US locations
 Global Presence: Worldwide operationsMolex is a global leader in providing custom wire harness solutions with integrated design and manufacturing expertise. The company offers comprehensive solutions from concept drawing to full-production testing, delivering superior performance while reducing delivery times. Their custom wire harnesses feature ultrasonic and mechanical splices designed to withstand rugged vibration and corrosive environments.Key Strengths:

• Global manufacturing and tooling capabilities
• One-stop solution for design and manufacturing
• Advanced sealing features and termination options
• Expertise in marine equipment, military equipment, and automotive applications
• ISO/TS16949-certified facilities ensuring automotive industry standards

5. Yazaki North America

Location: Canton, Michigan (North American headquarters)
 Founded: 1941
 Global Operations: Multiple North American facilitiesYazaki Corporation stands as one of the world's largest suppliers of automotive wiring harnesses, with the company beginning wire harness production in 1939. In North America, Yazaki operates ten production facilities across the Americas, including operations in Mexico. The company has pioneered wire harness technology for over 80 years and maintains comprehensive in-house capabilities from material development to final product manufacturing.Key Strengths:

• Pioneer in wire harness technology with 80+ years of experience
• Complete vertical integration from raw materials to finished products
• Custom-engineered power and data network solutions
• Comprehensive in-house manufacturing capabilities
• High-voltage wire harness expertise for electrified vehicles

6. American Autowire

Location: Bellmawr, New Jersey
 Founded: 1987
 Employees: 62
 Annual Revenue: $34.7 millionAmerican Autowire has established itself as the premier automotive electrical manufacturer for OEM/Restoration, Modified Restoration, and Street Rod/Custom vehicles. The company was founded by Michael Manning and Frank Colonna, who started by creating wiring harnesses for their personal Camaro projects in a basement operation. Today, they operate from a 38,000 square foot facility and offer five different product lines of wiring harnesses, accessories, and parts.Key Strengths:

• 35+ years of specialized automotive wiring experience
• American-made products manufactured in New Jersey
• Over 5,500 original restoration harnesses available
• Extensive product lines including Factory Fit and Street Rod catalogs
• Complete integrated fuse panel systems and modular solutions

7. Lear Corporation

Location: Southfield, Michigan (headquarters)
 Global Operations: 270+ facilities in 34 countries
 Employees: 110,000+ globallyLear Corporation ranks as a global automotive technology leader and is positioned third worldwide in electrical and electronic distribution systems. The company has been actively expanding its wire harness capabilities through strategic acquisitions, including the 2025 acquisition of StoneShield Engineering to enhance automation in wire harness production. Lear's E-Systems business focuses on electrical distribution systems, including high-voltage wire harnesses and power electronics.Key Strengths:

• Global leader in automotive electrical systems
• Advanced automation capabilities in wire harness production
• Comprehensive electrical distribution system expertise
• Leading Tier 1 supplier with full architecture solutions
• Strong focus on high-voltage and power electronics applications

8. Amphenol Corporation

Location: Multiple US facilities including Oconto, Wisconsin
 Founded: 1932
 Revenue: $15.22 billion (2024)Amphenol Corporation commands 34.8% of the U.S. wire connector manufacturing market and has established itself as a dominant force in the wire harness industry. Through its Amphenol Unlimited Services division, the company specializes in custom wire harness, cable, and control panel assemblies for off-road equipment, emergency vehicles, heavy-duty trucks, and industrial applications. The company operates from a 63,000 square foot facility in Oconto, Wisconsin, with additional operations in Mexico and Illinois.Key Strengths:

• Market leader with 34.8% US market share in wire connectors
• Comprehensive heavy-duty truck electrical system expertise
• Advanced automation and lean manufacturing concepts
• Over 30 years of specialized wire harness experience
• Progressive lean and flow manufacturing implementation

9. Specialized Products Ltd.

Location: Clintonville, Wisconsin
 Founded: 1994
 Facility Size: 85,000 square feet
 Employees: 100-199Specialized Products Ltd. is an ISO 9001:2015 registered manufacturer specializing in custom wire harnesses with fully integrated design and manufacturing capabilities. The company builds turnkey wire harness assemblies using wire sizes from 34 to 1/0 AWG with a wide selection of standard connector choices. Their large facility is equipped with advanced technology tools and equipment, enabling high-efficiency custom harness production.Key Strengths:

• ISO 9001:2015 registered quality management system
• Fully integrated design and manufacturing capabilities
• Wide range of environmental protection capabilities (abrasion, water, heat, temperature resistant)
• Advanced braiding capabilities for harsh environment applications
• Flexible production from prototypes to large volumes with JIT delivery

10. Genco Industries Inc.

Location: Waukesha, Wisconsin
 Founded: 1975
 Employees: 11-50Genco Industries has been providing wire harness, cable assembly, and electromechanical solutions for hundreds of OEMs for nearly 50 years. The company distinguishes itself through lean manufacturing concepts and automated equipment handling wire types and gauges from 30 to 4/0 AWG. Genco serves diverse markets including medical, transportation, mining, energy, telecommunications, and pharmaceutical industries.Key Strengths:

• Nearly 50 years of specialized wire harness experience
• Lean manufacturing environment with automated equipment
• In-house engineering support and skilled workforce
• Wide range of harness protection types including braided, bound, and heat shrink wrapped
• Flexible production from prototypes to large runs with Kanban systems

Industry Trends and Future Outlook

The truck wire harness manufacturing industry is experiencing significant transformation driven by several key trends. The transition to higher voltage systems is becoming increasingly important as Class 8 commercial vehicles move beyond traditional 12V systems to incorporate 24V and 48V systems for improved efficiency and power management.Electric and hybrid commercial vehicles are driving demand for specialized high-voltage wire harnesses capable of safely managing the unique requirements of electric powertrains. This shift is creating new opportunities for manufacturers who can develop expertise in high-voltage applications and advanced safety systems.Advanced manufacturing technologies are reshaping production capabilities, with companies investing in automation, robotics, and lean manufacturing principles to improve efficiency and quality while reducing costs. The integration of automated cutting, stripping, terminating, and testing equipment is becoming standard across leading manufacturers.Regulatory compliance continues to be a critical factor, with manufacturers needing to meet increasingly stringent safety and environmental standards while maintaining cost competitiveness. This includes compliance with various industry standards such as ISO 9001, IPC/WHMA-A-620, UL, and CSA certifications.The truck wire harness industry in the United States remains robust and well-positioned for continued growth, supported by strong domestic manufacturing capabilities, technological innovation, and the ongoing evolution of commercial vehicle electrical systems. As trucks become increasingly sophisticated and electrified, the demand for high-quality, reliable wire harness solutions will continue to drive opportunities for established manufacturers and new market entrants alike.