Nexharn Connectivity is an automotive wire harness supplier based in Dongguan, China, producing custom wire harness assemblies for automotive OEMs, Tier 1 and Tier 2 automotive suppliers, aftermarket accessory manufacturers, and EV component buyers worldwide. We design and manufacture automotive-grade wire harnesses to customer drawings and specifications, covering vehicle interior applications, engine bay assemblies, lighting systems, sensor connections, and EV powertrain wiring.

B2B buyers source automotive wire harnesses from Nexharn because we combine a dedicated wire harness production line with direct engineering support, competitive lead times, and full traceability documentation. Our custom wire harness manufacturing capability serves automotive and non-automotive buyers across multiple industries.

Automotive Wire Harness Manufacturing Capabilities

Nexharn produces automotive wire harness assemblies across the following application categories:

Vehicle interior wiring: Dashboard assemblies, door wiring harnesses, seat heating and adjustment harnesses, infotainment connections
Engine bay and underhood harnesses: Sensor connections, ECU wiring, ignition system harnesses, fuel management harnesses
Exterior lighting harnesses: Headlight assemblies, tail lamp connections, daytime running light (DRL) wiring
EV and hybrid wiring: High-voltage wiring systems, battery management connections, charging port harnesses, thermal management wiring
Aftermarket and retrofit: Custom harnesses for aftermarket audio, lighting upgrades, and vehicle accessory installation
Commercial vehicle harnesses: Truck cab harnesses, trailer connections, agricultural and construction vehicle wiring

Automotive Wire Harness Specifications

All parameters are customisable to buyer drawings and specifications:

Wire standard: JASO D611, ISO 6722, SAE J1128, or buyer-specified standard
Wire gauge: 0.35 mm² to 6.0 mm² (AWG 22 to AWG 10) for signal circuits; larger cross-sections for power distribution
Insulation material: PVC, XLPE, PTFE for high-temperature applications; flame-retardant grades to UL 94 V-0
Connector brands: TE Connectivity, Amphenol, Molex, Delphi (Aptiv), Yazaki, and equivalent-grade housing with gold or tin plating
Conduit and protection: Corrugated conduit, split loom, convoluted tubing, PVC tape wrap, or heat-shrink sleeve to application requirements
Testing: 100% continuity and insulation resistance testing; pull-out force testing on crimped terminals per specification
Temperature range: Standard automotive grades from -40°C to +125°C; high-temperature grades to +150°C or above on request

Automotive Wire Harness Applications

Passenger car OEM and aftermarket: seat adjustment, mirror control, window regulator wiring
Electric vehicle battery management system (BMS) wiring and inter-module connections
EV charging infrastructure: on-board charger connections, charging inlet wiring
Commercial trucks and vans: body controller module wiring, cargo area lighting harnesses
Agricultural and off-highway vehicles: engine management, PTO, and implement control harnesses
Marine automotive: bilge pump, navigation electronics, and instrumentation wiring

Nexharn also supplies industrial cable assemblies and TPU spiral cables for buyers who need multiple cable types from a single supplier.

Why Choose Nexharn as Your Automotive Wire Harness Supplier

10+ years supplying wire harness assemblies to automotive and industrial buyers
Dedicated wire harness assembly line with trained crimp operators and quality inspectors
100% electrical continuity and pull-out force testing per batch
Material traceability: wire lot numbers and connector batch records retained per order
English-speaking engineering team for drawing review, specification clarification, and DFM feedback
Factory audit available: third-party or buyer QA team visits welcomed
Stable supply for production programmes with consistent part numbers across batches

MOQ, Lead Time, and Sample Policy

MOQ: Standard minimum from 500 pcs. Engineering samples and prototype batches supported at lower quantities.
Sample lead time: 2–3 weeks from drawing confirmation and sample fee payment.
Production lead time: 30–50 days after sample approval and deposit. Rush production available for urgent programmes.
Documentation: First Article Inspection (FAI) report, test records, and material certificates available on request.
Payment: T/T and L/C accepted. FOB Shenzhen or Guangzhou.

Frequently Asked Questions — Automotive Wire Harness Supplier

Can Nexharn produce harnesses to JASO or SAE wire standards?

Yes. Nexharn produces automotive wire harnesses using wire to JASO D611, ISO 6722, and SAE J1128 standards. Buyer-specified wire standards or alternative standards can be accommodated — include the standard reference in your drawing or specification.

Do you supply harnesses with Delphi or TE Connectivity connectors?

Yes. Nexharn sources and assembles harnesses with connectors from TE Connectivity, Amphenol, Molex, Delphi/Aptiv, Yazaki, and other major automotive connector brands. Specify your preferred connector brand and part number in the drawing or BOM.

Can you produce low-volume prototype harnesses for automotive development programmes?

Yes. Nexharn supports prototype and development batches for automotive customers. Minimum quantities for prototype runs are lower than standard production MOQ. Contact us to discuss your development programme requirements.

What testing is performed on automotive wire harnesses?

All Nexharn automotive wire harness assemblies undergo 100% continuity testing and insulation resistance testing before shipment. Pull-out force testing on crimped terminals is performed per the connector manufacturer’s specification. Additional testing (high-voltage hipot testing, temperature cycling) is available on request.

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Automotive Wire Harness Supplier: Custom Wire Harness Assemblies for Automotive OEMs and Aftermarket Buyers