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Custom Wire Harness Assembly Manufacturing Services

Custom Wire Harness Assembly and Superior Customer Service

Manufacturing Custom Wire Harness Assemblies Since 1990

Since American Cable & Harness (ACH) was founded, we’ve provided unmatched expertise and quality combined with one-on-one personal service to deliver exactly what you need, when you need it.

Our highly trained technical staff treats every project as unique, because every project truly is. Whether you need 20,000 small wire harnesses for hair clippers or a short run of a critical component for a sophisticated medical device, you will receive a robust and reliable assembly.

Vertically Integrated Solutions

High-quality Standards

Strict Specifications

Any Length, Any Quantity, Any Complexity Manufactured To The Highest Standards

  • Automated cutting & stripping of multi-conductor cable
  • Cutting, stripping & terminating of lead wires
  • Large harness capability (up to 50 feet)
  • Braiding
  • Looming
  • Ultrasonic welding
  • Potting
  • ROHS-compliant tin dipping
  • Inline hot stamping of alphanumeric characters
  • Semi-automated heat shrinking
  • Wire marking
  • Label wrapping
  • Automated pull testing
  • Continuity & functional testing of complete harnesses

Our New Product Introduction (NPI) Process for Custom Wire Harness Assemblies

Terminated twisted pairs wire assemblies

Bill of Materials
The customer provides a material list and requirements. Our engineers review it and determine exact wire lengths based on bends and breakouts, which may differ from the original prints.

Cut Sheet
We refine and organize the BOM into a detailed cut sheet, specifying wire type, gauge, color, length, strip-back distance, and jacket material—ensuring readiness for the NPI build.

The NPI Build
We lay out the wire assembly on a harness board and document the process. For complex builds (up to 50 feet with multiple breakouts), customer approval is required before full production.

Markup
We review and test the NPI build, adjusting as needed (e.g., wire lengths, strip-backs). Changes are documented via Engineering Change Notices, and continuity testing confirms correct routing.

Production
After the completion of changes and testing, the customer has final NPI sample review to make any changes needed. After customer sign-off, the approved NPI sample moves into full-scale production.

Your All-In-One Custom Wire Harness Assembly Solution

We serve customers in many industries, such as industrial controls, scientific instrumentation, aerospace, medical, agriculture, water purification and monitoring, high-density mobile storage systems and HVACR building controls. Rigorous, reliable and responsive, we exceed expectations through continuous improvement, personalized service and ISO 9001:2015 quality management.

Completed wire harness with close up of connectors

Custom Wiring Harness Applications

Many everyday products and tools rely on wire harness assemblies to function reliably and efficiently. As a wire harness assembly manufacturer, we support a wide range of industries by providing solutions that simplify installation, enhance durability, and ensure consistent performance.

Medical Equipment
Diagnostic equipment, patient monitoring systems, and hospital beds

Aerospace and Aviation 
Small engines, avionics systems, and lighting systems

Heavy Equipment Electronic Controls
Trailer lighting kits and braking systems

HVAC Industrial Controls 
Commercial HVAC units, air handlers, and ventilation control systems

Industrial Control Components
Food and beverage equipment, arcade games, and sport arena lighting

Agriculture
Tractors and combines, lawn and garden equipment, and livestock care equipment

A custom wire harness is a bundled grouping of wires and/or cables that is installed into a larger product or device during the manufacturing process to create connections such as power or data within the product or device. Each wiring harness assembly project is unique in its length, quantity, complexity and application. No two custom wire harnesses are alike. 

What Makes a Wire Harness Assembly Different From a Cable Assembly?