Wire harness manufacturers by capability
Find wire harness and cable assembly plants by the technical capability you require — overmolding, HV, ultrasonic welding, crimp force monitoring and more. Each page lists every published plant on Harness Atlas that has self-declared or independently verified that capability.
Technical capabilities
Overmolding
Overmolding integrates a sealed plastic body around connectors, splices and strain reliefs to deliver IP-rated, vibration-resistant harnesses for automotive, off-road and industrial applications.
67 plants
High-Voltage (HV) Capable
High-voltage harness manufacturers serving EV, energy storage, and industrial power applications, with the tooling, training and isolation testing required for HV assemblies.
18 plants
Ultrasonic Welding
Ultrasonic welding produces solid, gas-tight splices without heat, ideal for high-current automotive, EV and battery harness assemblies.
21 plants
Crimp Force Monitoring
Crimp force monitoring (CFM) detects defective terminations in real time and is a baseline requirement for safety-critical automotive and aerospace harnesses.
19 plants
Soldering
Hand and machine soldering capability for splice, terminal and PCB-to-wire interconnects across industrial, medical and aerospace harnesses.
50 plants
Braiding
Braided sleeving and overbraiding for EMI shielding, abrasion resistance and aesthetic finish on automotive, aerospace and industrial harnesses.
23 plants
Twisted Pair Production
Twisted pair production for differential signal and CAN/LIN bus harnesses across automotive and industrial applications.
8 plants
Sealing & Grommets
Single-wire seals, cavity plugs and grommet assembly for IP-rated automotive, off-road and outdoor industrial harnesses.
4 plants
Heatshrink Application
Heatshrink and adhesive-lined tubing application for splice insulation, strain relief and environmental sealing.
17 plants
Labeling & Wire Marking
Wire marking, label printing and traceability for serialised and regulated harness assemblies in aerospace, medical and industrial sectors.
50 plants
Continuity Testing
100% inline continuity testing on every harness assembly to confirm correct routing and termination before shipment.
54 plants
Hi-Pot (Dielectric) Testing
Hi-Pot dielectric withstand testing to verify insulation integrity for high-voltage, medical and industrial harness applications.
21 plants
Functional Testing
End-of-line functional testing with custom fixtures to validate harness behaviour against the buyer's electrical specification.
23 plants
IPC/WHMA-A-620 Workmanship
Production to IPC/WHMA-A-620, the global workmanship standard for cable and wire harness assemblies.
63 plants
Looking for certified suppliers?
IATF 16949, ISO 9001, ISO 13485, AS9100 and IPC/WHMA-A-620 certified manufacturers now have their own dedicated landing pages.
Browse by certification