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Custom Wire Harness & Pigtail Manufacturing
for OEM and Production Applications

Looking for a replacement harness for a 1955-1984 GM Muscle Car or Truck? Our regular vehicle-specific restoration harnesses are separate from this custom production manufacturing service.

In addition to manufacturing reproduction wiring harnesses for the automotive restoration market, M&H provides contract manufacturing services for Original Equipment Manufacturers (OEMs), aftermarket manufacturers, and other commercial customers requiring custom wiring harnesses, pigtails, and electrical assemblies in production quantities.

Our custom manufacturing services are designed for repeat production, beginning at quantities of 100 pieces per harness or pigtail design and extending into the thousands or tens of thousands. Whether your company needs a production run of small pigtails or a high-volume supply of complex wiring harnesses, M&H has the equipment, engineering experience, and manufacturing capacity to meet your needs.

Some of the markets we serve include:
  • Automotive OEM
  • Performance Aftermarket
  • Mobility Van Conversions
  • Electric Vehicles
  • RV and Bus
  • Farm Equipment
  • Marine

We can manufacture production harnesses and pigtails from your existing engineering drawings, blueprints, and specifications, or our engineering team can work with you to develop a production-ready design from the ground up. Our focus is on repeatable manufacturing, consistent quality, and efficient production for ongoing or volume requirements.

We have the largest selection of automotive-grade GXL wire on the West Coast. We carry all the popular gauge sizes, along with most colors and stripe combinations. Our extensive inventory of thousands of hard-to-find connectors and terminals, including discontinued GM/Delphi/Packard Electric part numbers, is unmatched in the wiring harness industry.

We utilize components from some of the industry's most trusted manufacturers, including:
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Some of our production equipment includes:
Artos MTX-10 Multi-Task Wire Processor
Artos MTX-10 Multi-Task Wire Processor
  • Fully programmable, allowing us to set up your production job once and efficiently run repeat orders.
  • Ability to cut, strip, and terminate both ends of a wire.
  • Processes as many as 4,500 wire operations per hour.
  • Integrated wire tinning station.
  • Integrated ink-jet marking station.
  • Integrated crimp force monitoring helps ensure consistent terminal crimps.
  • Significant labor cost savings for high-volume production jobs.
Injection Mold Machines

We can mold rubber and plastic connectors in-house for production runs and can even design custom connectors for your application.

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Electro-Mechanical Applicator Presses

Our 3 and 5 ton electro-mechanical applicator presses provide consistent terminal crimps for repeat production. Pull testing helps verify crimp quality and process consistency.

Computerized Circuit Testers

All assembly follows strict quality control guidelines. Our digital circuit testers are programmed to check continuity, mis-indexed wires, splice integrity, and short circuits throughout each harness.

Production Engineering

Our engineering team has decades of experience designing and manufacturing automotive wiring harnesses. We can work from your existing specifications or help develop a production-ready design engineered for repeatable, efficient manufacturing.