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
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.					
Custom Wiring Harness and Cable Assembly today.
Choose JinHai to accelerate your project's success—JinHai grows alongside your project!
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
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:
- We use fully automatic crimping machines with pressure monitoring to crimp terminals and wires at high speed and stability.
 - JinHai uses crimping technology to create a crimping action such as merging multiple wires.
 - We offer processes using dedicated lines and dedicated tooling boards.
 - JinHai adopts different crimping technologies, such as semi-automatic crimping, fully automatic crimping, etc.
 
In addition, JinHai is also an expert in terminal manufacturing, connector manufacturing, cable tie manufacturing, protective material manufacturing, switch manufacturing, etc.
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.
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.
Leveraging robust R&D and manufacturing capabilities, Jinhai produces automotive wiring harnesses including engine compartment harnesses, body harnesses, and chassis harnesses.
Utilizing automotive-grade harness manufacturing expertise, Jinhai manufactures motorcycle wiring harnesses such as head harnesses, body harnesses, and steering harnesses.
Leveraging extensive material expertise, Jinhai provides agricultural wiring harnesses for machinery, including cab harnesses, working equipment harnesses, and sensor harnesses.
Through comprehensive product offerings, Jinhai independently manufactures main power harnesses, motherboard harnesses, motor harnesses, and control panel harnesses.
Submit A Quick Quote
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.
- Terminals (welding process/copper tin plating/copper nickel plating/copper gold plating/copper silver plating, etc.)
 - Connectors (PA66/PA6/PBT, etc.)
 - Wires (0.75 mm2/1.0 mm2/1.25 mm2/1.5 mm2/2.0 mm2, etc.)
 - Cable ties (PA66/PA6, etc.)
 - Adhesive tape (PVC/BOPP/PET/PE/PP, etc.)
 - Waterproof plug (silicone/EPDM/fluororubber, etc.)
 
- Fully automatic crimping equipment
 - Fully automatic assembly equipment
 - C type winding machine
 - Mobile Tool Palette
 - Dedicated electrical test bench
 

















What Our Customer Say
					 What is the minimum order quantity? 
							
			
			
		
						
				At JinHai, we define MOQ based on different harness types. Below are JinHai’s internal minimum order quantities:
- Simple harnesses (consumer electronics or small appliance internal harnesses)
 
- MOQ: 500–2000 pieces;
 
- Moderately complex harnesses (industrial harnesses, agricultural machinery harnesses, low-voltage automotive harnesses)
 
- MOQ: 1,000–5,000 pieces;
 
- Highly Complex Harnesses (e.g., engine harnesses, chassis harnesses, instrument panel harnesses)
 
- MOQ: 5,000+ pieces
 
- Fully Customized Harnesses
 
- JinHai determines MOQ based on complexity and cost considerations: 2,000–5,000 pieces;
 
					 Do you support customized designs? 
							
			
			
		
						
				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:
 
- Electrical Schematic: Specify wire gauge, connector models, fuse/relay locations, etc.;
 - 2D Layout Diagram: Specify branch dimensions, cable tie attachment points, protective material specifications, and shielding requirements;
 - Application Environment Parameters: Indicate operating temperature range, vibration conditions, waterproof rating, and EMC requirements;
 
- Customization Service Process:
 
- Our company requires 1-3 business days to confirm the harness’s operating environment, application scenarios, and special requirements;
 - 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).
 - 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.
 - Batch Delivery Cycle: Small batches (>100 pieces) require 15-20 days. Large batches (>1000 pieces) require 30-45 days (partial shipments possible).
 
- Important Notes
 
- Drawings require final customer confirmation and signed return for our records;
 - Design changes after mass production may incur fees based on the number of change points and complexity;
 - We offer cost optimization solutions, e.g., replacing PTFE with XLPE reduces costs by 40%.
 
					 Logistics Methods 
							
			
			
		
						
				JinHai offers multiple logistics options:
- International Express Delivery: Ideal for sample shipments. Couriers assist with customs clearance. JinHai currently partners with DHL, TNT, and EMS.
 - International Air Freight: Suitable for small-batch product deliveries. Offers faster transit times than sea or rail freight with high security.
 - International Sea Freight: The most prevalent shipping method in international trade, suitable for bulk order shipments with flexible containerization options.
 - International Rail Transport: Also suitable for bulk order shipments, primarily serving the China-Europe corridor.
 
					 Quality Control Measures in Production? 
							
			
			
		
						
				- 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.
 
					 Can we visit your factory? 
							
			
			
		
						
				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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