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Looking for the best custom wire harness and cable assembly manufacturing services?

28 Years ODM/OEM Expertise | Rapid Custom Wiring Harness Factory | One-Stop Solutions | Replies Within 8 Hours

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Comprehensive Solutions

Annual output of automotive wiring harnesses exceeding 300,000+ units

Through precision sourcing globally and localization solutions domestically, we enable you to achieve cost control and efficiency optimization.

Customizable Products

One-on-one service tailored to your specific needs

Every order comes with a dedicated specialist to address your product needs and ensure smooth delivery.

Rigorously Controlled

High Yield Rate | Rapid Prototyping to Final Delivery

Our wiring harnesses strictly adhere to the highest industry standards to provide long-lasting and reliable protection for your products.

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Custom Wiring Harness and Cable Assembly today.
With 28 years of deep expertise in the wire harness field as an ODM/OEM provider, we deliver all precise, high-quality solutions to meet your business needs.
Choose JinHai to accelerate your project's success—JinHai grows alongside your project!
IS09001 2015 Certificate

JinHai's Comprehensive Customization Service Process

As a professional custom wiring harness supplier, JinHai’s customization services accelerate your project success and meet your unique requirements.

20+

Manufacturing Experience

30+

Technical Staff

30+

Serving The Country

10000
square meters of production facilities
Golden Pig Global Craftsmanship Process - Cover

JinHai - Custom High-Quality Wiring Harnesses

Jinhai offers custom processing services for finished and semi-finished wire harnesses. We provide multiple crimping techniques, including crimping and solder-dipping. Our engineers can design wire harnesses based on 3D digital models and convert them into 2D drawings, fulfilling customers’ customization needs throughout the entire process from design to production.

Jinhai possesses high-speed fully automatic terminal crimping machines, stranding machines, mobile assembly lines, and 100% continuity testing equipment.

Jinhai’s advanced production facilities ensure efficient manufacturing and consistent quality for critical wire harness processes. Our wire harness manufacturing services benefit numerous industries including automotive, motorcycle, agriculture, and home appliances.

If you need custom wire harness manufacturing or OEM services, please choose JinHai as your manufacturer!

Customize Any Harness For Your Project

JinHai has a comprehensive range of wire harness processing services that can be customized to your specific design, size, mechanical properties, electrical performance and other requirements. Our engineers can customize your order through the following services and processes:

In addition, JinHai is also an expert in terminal manufacturing, connector manufacturing, cable tie manufacturing, protective material manufacturing, switch manufacturing, etc.

Advantages
Rapid Prototyping and On-Demand Manufacturing
Jinhai offers both small-batch and large-scale production services. We are fully capable of providing you with optimal solutions. Choose our manufacturing services to customize any wire harness or switch. With over 20 years of wire harness manufacturing experience, we have served more than 3,000 clients worldwide.
● Jinhai delivers the most cost-effective prototyping solutions with instant quotes and fast delivery.
● Our small-batch order service delivers high reliability to help you rapidly validate your market.
● Jinhai's customization services reduce your costs and provide the best product experience.
After-sales

100% Compliant Prototype

We develop prototypes based on your practical requirements.

High-Quality Standards

Each wiring harness complies with relevant standards including 3C, CE, UL, IATF 16949, and ISO 9001.

Professional Matching

We have a team of experienced design experts to help your project achieve rapid success.

Cross-section analysis

All our terminals undergo cross-sectional analysis control according to product specifications.

Connectors Terminals

We have 20 years of experience collaborating with manufacturers and distributors such as TE, MOLEX, JST, THB, and HIROSE, enabling us to provide rapid global procurement services.

QC Department 100% Loop Continuity Test

OQC is responsible for 100% loop continuity testing, while PQC conducts re-testing and sampling inspections.

Recent Product

Customized Wire Harness Manufacturing For Different Industries

JinHai can manufacture various types of wire harnesses for your application, just send us your drawings and get our best quote.

Automotive

Leveraging robust R&D and manufacturing capabilities, Jinhai produces automotive wiring harnesses including engine compartment harnesses, body harnesses, and chassis harnesses.

Motorcycles

Utilizing automotive-grade harness manufacturing expertise, Jinhai manufactures motorcycle wiring harnesses such as head harnesses, body harnesses, and steering harnesses.

Agricultural Machine

Leveraging extensive material expertise, Jinhai provides agricultural wiring harnesses for machinery, including cab harnesses, working equipment harnesses, and sensor harnesses.

Smart Home

Through comprehensive product offerings, Jinhai independently manufactures main power harnesses, motherboard harnesses, motor harnesses, and control panel harnesses.

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Why JinHai Is Trusted By 1000+ Clients

Our wire harness manufacturing services deliver significant benefits to diverse industries, enterprises, and projects. Below are the advantages of our services:

Cost-Effective and Rapid Production

We process orders swiftly, centralize raw material procurement, and simultaneously manufacture wire harnesses for multiple sectors. Jinhai ensures consistent product quality while maintaining rapid production. Large-volume and long-term orders enable us to offer more cost-effective wire harness manufacturing services.

Exceptional Flexibility and Lightweight Design

Through our advanced wiring harness manufacturing processes, we employ flexible approaches to elevate harness production to new heights.

Extensive Materials and Technologies

As wiring harness specialists, our robust expertise enables us to produce versatile, high-performance harnesses for systems like steering, instrumentation, and multimedia. Our harness materials withstand extreme temperatures, corrosion, and diverse operating conditions.

Customer-Centric Material Solutions

We strictly adhere to customer-specified materials for production. When no materials are specified, we provide alternative solutions to meet client requirements.

Extensive Business Scope

With superior manufacturing capabilities and a broad production footprint, Jinhai delivers premium wiring harnesses for automotive, agricultural machinery, motorcycle, and home appliance industries.

Multiple Options
We offer a variety of options based on your product's application and performance requirements. If existing materials don't meet your needs, we can customize materials with specialized properties.
Provide More Professional Equipment
Use different machines for wire harness processing to ensure product quality.
Watch Our Production Process

What Our Customer Say

FAQ
Customers choose us not only because we create value for them, but also because we provide detailed and patient answers. Here are some of the frequently asked questions we've compiled.

At JinHai, we define MOQ based on different harness types. Below are JinHai’s internal minimum order quantities:

  1. Simple harnesses (consumer electronics or small appliance internal harnesses)
    • MOQ: 500–2000 pieces;
  1. Moderately complex harnesses (industrial harnesses, agricultural machinery harnesses, low-voltage automotive harnesses)
    • MOQ: 1,000–5,000 pieces;
  1. Highly Complex Harnesses (e.g., engine harnesses, chassis harnesses, instrument panel harnesses)
    • MOQ: 5,000+ pieces
  1. Fully Customized Harnesses
    • JinHai determines MOQ based on complexity and cost considerations: 2,000–5,000 pieces;

Yes, we offer full-process customized design services, but require clients to provide clear technical input documents to ensure precise alignment with requirements. Below are the specific requirements and collaboration process:

  • Required Input Documents:
    1. Electrical Schematic: Specify wire gauge, connector models, fuse/relay locations, etc.;
    2. 2D Layout Diagram: Specify branch dimensions, cable tie attachment points, protective material specifications, and shielding requirements;
    3. Application Environment Parameters: Indicate operating temperature range, vibration conditions, waterproof rating, and EMC requirements;
  • Customization Service Process:
    1. Our company requires 1-3 business days to confirm the harness’s operating environment, application scenarios, and special requirements;
    2. After providing 3D simulation drawings and 2D flat patterns, our company requires 5-10 business days for design verification. We can assist with initial revisions and iterations (up to 3 free rounds).
    3. Sample Production: After design verification, we require 7-15 business days for raw material procurement and sample fabrication. Sample quantity: 1-3 pieces (prototyping fees apply upfront, but can be offset against bulk production costs). Samples shipped with harness appearance and continuity test reports.
    4. Batch Delivery Cycle: Small batches (>100 pieces) require 15-20 days. Large batches (>1000 pieces) require 30-45 days (partial shipments possible).
  • Important Notes
    1. Drawings require final customer confirmation and signed return for our records;
    2. Design changes after mass production may incur fees based on the number of change points and complexity;
    3. We offer cost optimization solutions, e.g., replacing PTFE with XLPE reduces costs by 40%.

JinHai offers multiple logistics options:

  1. International Express Delivery: Ideal for sample shipments. Couriers assist with customs clearance. JinHai currently partners with DHL, TNT, and EMS.
  2. International Air Freight: Suitable for small-batch product deliveries. Offers faster transit times than sea or rail freight with high security.
  3. International Sea Freight: The most prevalent shipping method in international trade, suitable for bulk order shipments with flexible containerization options.
  4. International Rail Transport: Also suitable for bulk order shipments, primarily serving the China-Europe corridor.
  • Incoming Material Inspection
    • Wires and terminals are sampled and tested based on the supplier’s shipping report to verify wire strand count, wire diameter, color, terminal plating thickness, and dimensions. Connectors are sampled and tested for dimensional compliance against official drawings.
  • Process Inspection
    • Wire Cutting/Crimping Process: Initial, patrol, and final inspections are conducted per CP requirements. Patrol inspections occur at a frequency of 2 hours per shift.
    • Pre-assembly Process: Insertion follows the “insert, listen twice, pull back” procedure.
    • Assembly Process: First, verify seal installation. Second, confirm secondary locking of connectors and primary locking of terminals.
  • Final Inspection
    • Inspectors conduct 100% dimensional checks of harnesses using tape measures/steel rulers;
    • Perform 100% electrical functionality testing on finished harnesses using dedicated harness electrical test benches;
    • Quality inspectors conduct final checks on harness appearance, material integrity (clips/tie wraps), label content, and clarity;
    • The Quality Department periodically samples from qualified products for more stringent full-dimension measurements and functional testing to ensure production process stability;
  • Traceability Assurance
    • Each harness is assigned a unique label serial number, traceable through the labeling system. This enables rapid identification of the source and isolation of problematic products in the event of an issue.

Of course, we welcome you to visit our factory at any time. Please email or call us to let us know if you have a trip planned.

Our Amazing Clients

For more than 20 years, we have worked closely with many outstanding clients, helping each of our partners to grow their business and develop their careers.

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