Michigan-Based Manufacturer
Harnex Manufacturing designs and builds custom wire harnesses, cable assemblies, and electromechanical builds for OEMs and innovators across every industry — from first prototype to full production.
About Harnex
Harnex Manufacturing is a Michigan-based wire harness and cable assembly manufacturer built on precision, reliability, and full in-house process control. From first prototype to full-scale production, we partner with OEMs and startups to deliver wiring systems that perform in the field.
More about usWhat We Build
Custom harnesses cut, crimped and routed to your exact drawing.
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Jacketed cables built for moisture, abrasion and constant motion.
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Sealed, strain-relieved connectors molded to your geometry.
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Finished, tested electromechanical assemblies ready to install.
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Continuity, hipot and pull testing with documented results.
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Early engineering review to cut cost, rework and surprises.
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Low-volume, fast-turnaround builds to validate your design.
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Connector replacement and field-failure correction on existing units.
Learn moreHow We Build
Automated cutting and stripping for precise lengths and clean insulation removal on every run.
02High-precision presses and applicators for strong, repeatable crimps from the first unit to the last.
03Solderless ultrasonic welding for low-resistance splices that hold up under vibration.
04Custom molds that seal connectors against moisture and add strain relief.
Industries
Why Harnex
Design-assist and DFM review by the people who will build your product.
Cutting, crimping, molding, testing and integration all under one roof.
From a single prototype run through full production programs.
Workmanship-standard checks at each station, not just at the end.
Real people who answer questions and keep your program moving.
Our Process
Send your print, BOM or a description of your application and we’ll respond with a quote.
Our engineers review your design for manufacturability and cost before we build.
Your assemblies are built and tested in-house to your drawing and workmanship criteria.
Finished, inspected units are packed and shipped to your dock.
Insights
Behind the Build · September 29, 2026 · 3 min read
Follow a wire harness through the Harnex production floor, from cut and strip through crimping, splicing, molding and final testing.
Read articleIndustry Trends · September 29, 2026 · 3 min read
Supplier problems rarely arrive all at once. Watch for these five warning signs that your wire harness supplier may no longer be the right…
Read articleManufacturing Insights · September 29, 2026 · 3 min read
Overmolding seals and strengthens the weakest point of a cable assembly: the connector transition. Learn the main process options and how to choose between…
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