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Wire Harness Assembly

Wire Harness Assembly Services In The USA

A wire harness – also known as a wiring harness or cable harness – is a structured assembly of electrical wires, terminals, connectors, and protective components. Unlike loose wiring, a harness organizes and secures electrical circuits into a compact, manageable unit that simplifies installation, improves serviceability, and enhances long-term durability.
// Wire Harness Assemblies at Any Volume

Custom Wire Harness Assembly Services for Reliable Electrical Interconnects

At EMS, Inc., we specialize in high-quality wire harness assembly services, delivering organized, efficient, and durable wiring solutions tailored to your specific needs. With over 19 years of experience in electronics manufacturing, our ISO 9001-certified facility in Lincoln, Arkansas, ensures precision and reliability for every project—from prototypes to full-scale production.

From simple two-wire jumpers to complex, multi-breakout webs with hundreds of termination points, we provide “drop-in” ready harnesses that reduce your final assembly time and eliminate wiring errors.

wire harness bundle
Wire Harness Assembly Process

  • Design review and material selection.
  • Precision cutting, stripping, and termination.
  • Harness layout, bundling, and protection.
  • Electrical testing and quality inspection.
  • Final packaging and delivery.

Our Wire Harness Assembly Service Delivers:

  • Custom design & engineering support.
  • Advanced production techniques and quality-tested components.
  • Rigorous continuity, resistance, integrity, and functionality testing.
  • Scalable production - from prototype builds to high-volume runs.
  • Material & connector flexibility.

// Complete Wire Harness Assembly Services

Our Wire Harness Assembly Capabilities

Precision Routing & Organization

We use dedicated form boards to guarantee that every harness fits your specific enclosure geometry perfectly.

  • Form Board Assembly: 1:1 layout boards ensure exact breakout lengths and connector positioning for consistent "drop-in" fit.
  • Wire Management: Organized bundling using cable ties, lacing cord, split-loom tubing, and expando sleeving.
  • Space Optimization: Tight bundling techniques to minimize bulk in compact devices and prevent interference with internal components.
  • Complex Breakouts: Management of multiple branch points to route power and signals to different areas of a PCB or chassis.

Automated Processing & Termination

Our investment in automated tooling allows us to process discrete wires with speed and repeatability that manual labor cannot match.

  • High-Speed Processing: Automated cutting, stripping, and crimping for discrete wires ranging from 32 AWG to 6 AWG.
  • Connector Versatility: Extensive tooling library for major brands including TE Connectivity (AMP), Molex, JST, and Hirose.
  • IDC Technology: Insulation Displacement Connection capabilities for rapid mass termination of ribbon cables and discrete wires.
  • Wire Twisting: Automated twisting services for twisted-pair applications to reduce cross-talk inside the chassis.

Identification & Integration

We design harnesses that are not just electrical conductors, but tools to speed up your final assembly process.

  • Custom Labeling: Hot stamp, inkjet, or wrap-around labels on individual wires or bundles for easy identification during installation.
  • Color Coding: Standardization of wire colors to match your schematics, reducing the risk of installation errors.
  • Kitting: We can group multiple harnesses into installation kits to streamline your inventory and production line.
  • Integrated Mounting Hardware: Pre-installation of clips, bites, or clamps to ensure instant snap-in mounting on your production line.

Quality Assurance & Testing

Internal wiring failures are costly to diagnose and repair. We ensure every harness is electrically perfect before it reaches your line.

  • 100% Continuity Testing: Automated scanning to verify all circuits are complete and correctly pinned.
  • Crimp Quality Analysis: Regular pull-force testing and cross-section analysis to verify gas-tight crimp connections.
  • Visual Inspection: Strict adherence to IPC/WHMA-A-620 standards for workmanship and cleanliness.
  • Mating Verification: Usage of mating test fixtures to ensure connectors are not damaged and lock securely.

WIRE HARNESS KEY BENEFITS:

  • Improved reliability and reduced risk of wiring errors.
  • Faster, cleaner installation and easier maintenance.
  • Enhanced protection against vibration, abrasion, and environmental exposure.
  • Better organization and space efficiency within assemblies.
  • Consistent quality through standardized manufacturing processes.

WIRE HARNESSES VS. CABLE ASSEMBLIES:

  • Cable Assemblies are external, jacketed, and weather-resistant connections.
  • Wire Harnesses are internal bundles of discrete wires, organized with cable ties, sleeving, or tape. They are designed to fit perfectly into specific 3D spaces, routing around components and through tight enclosures without wasting space.
// Most Frequent Questions

Wire Harness Assembly FAQ

A wire harness assembly is an organized grouping of electrical wires, connectors, terminals, and protective components that transmit power or signals within a system. Wire harnesses improve reliability, simplify installation, and protect wiring from wear, vibration, and environmental exposure.

Yes. We specialize in custom wire harness assemblies designed to meet your exact electrical, mechanical, and environmental requirements. Our engineering team works closely with customers to support new designs, redesigns, and legacy products.

We support a wide range of industries, including:

  • Industrial and automation equipment
  • Medical devices
  • Aerospace and defense
  • Automotive and transportation
  • Telecommunications
  • Consumer electronics
  • Renewable energy systems

Absolutely. EMS supports prototype development, low-volume production, and high-volume manufacturing, allowing customers to scale seamlessly as their project progresses.

Each wire harness is tested according to project requirements, which may include continuity testing, resistance checks, visual inspection, and functional verification to ensure quality, accuracy, and reliability before shipment.

Yes. We provide design support, including harness layout recommendations, connector selection, labeling, and full documentation to streamline installation and future service.

We work with a wide range of wire gauges, insulation types, connectors, terminals, protective sleeves, and strain relief options to meet both standard and demanding application requirements.

Yes. We offer custom labeling, tagging, and identification options to improve traceability, simplify installation, and support system maintenance.

Our wire harness assemblies follow controlled manufacturing processes with documented work instructions, in-process inspections, and final quality checks to ensure consistent performance and compliance.

You can request a quote by contacting EMS Cable directly through our website or by phone. Providing drawings, specifications, or samples helps us respond quickly and accurately.

// Start to Finish Electronics Manufacturing Services

EMS' Capabilities

EMS stands out in turning ideas into finished products in one location. For more than 19 years, we have assisted entrepreneurs in turning ideas into finished products. We also excel at handling “Dirty Jobs” – the demanding, labor-intensive tasks that can hinder production. Whether it’s a medical device, military equipment, or a high-end gadget, we have the tools and experience to realize your vision.

GETTING STARTED

Getting your project started is easy. Just share your idea with our team, and we will give you expert advice and suggestions on the materials, timeline, and cost breakdown required to complete the project. We guarantee the highest level of performance and effectiveness for your particular use.

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