OEM assemblies built to an agreed drawing, bill of materials and inspection plan. Discuss your application, sample requirements and production quantities with JinHai.
Send Your Inquiry NowDrawing and component review before quotation
Compare material options, tooling and assembly scope on the same requirements.
One-on-one service tailored to your specific needs
Exclusive services, providing you with tailor-made customized solutions
Project-specific inspection and production controls
Confirm the applicable quality requirements, inspection records and support arrangements for your order.
Send your application requirements to define the connector interfaces, circuit layout, materials, protection and verification needed for your assembly.
Start with a clear drawing revision and identify any specifications that still need confirmation.
Send Inquiry NowExplore application examples and send your drawing, operating environment and quantities for a project-specific review.

Leveraging robust R&D and manufacturing capabilities, Jinhai produces automotive wiring harnesses including engine compartment harnesses, body harnesses, and chassis harnesses.
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Utilizing automotive-grade harness manufacturing expertise, Jinhai manufactures motorcycle wiring harnesses such as head harnesses, body harnesses, and steering harnesses.
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Leveraging extensive material expertise, Jinhai provides agricultural wiring harnesses for machinery, including cab harnesses, working equipment harnesses, and sensor harnesses.
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Through comprehensive product offerings, Jinhai independently manufactures main power harnesses, motherboard harnesses, motor harnesses, and control panel harnesses.
Learn more ›Customized services deliver significant benefits to businesses and projects across all industries.

Design support from prototype to mass production. Comprehensive solutions encompassing crimping, soldering, ultrasonic welding, cutting, marking, and assembly.

Wire harnesses feature markings, text, or logos and can be secured with cable ties or adhesive tape. Wire gauge, number of conductors, insulation type specified per project.
Send your requirements for an engineering and quotation review.
Define the required operations and acceptance criteria for your custom assembly.
Design support from prototype to mass production. Comprehensive solutions encompassing crimping, soldering, ultrasonic welding, cutting, marking, and more.
Wire harnesses feature markings, text, or logos and can be secured with cable ties or adhesive tape. Wire gauge, number of conductors, insulation type, and color are all customizable. To ensure consistent quality, we perform 100% functional testing and dimensional measurement.
Customized services deliver significant benefits to businesses and projects across all industries. Here are the advantages of our services:
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.
Through our advanced wiring harness manufacturing processes, we employ flexible approaches to elevate harness production to new heights.
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.
We strictly adhere to customer-specified materials for production. When no materials are specified, we provide alternative solutions to meet client requirements.
With superior manufacturing capabilities and a broad production footprint, Jinhai delivers premium wiring harnesses for automotive, agricultural machinery, motorcycle, and home appliance industries.
JinHai's custom wiring harness services enable us to maintain an exceptionally extensive range of raw materials. We can provide the most suitable material type tailored to your project requirements.
JinHai possesses a wide range of conventional and unconventional equipment.
As a professional custom wiring harness supplier, JinHai's customization services accelerate your project success and meet your unique requirements.
JinHai is responsible for every stage of your project, from design and prototyping to full-scale production.
Develop corresponding design solutions based on the specific application environments and other special requirements of the wiring harness.
Based on the drawings provided by the customer, we identify the materials to ensure the custom wiring harness meets your requirements.
From global standard parts to custom specialty materials, we can provide the raw materials to meet your needs.
Our advanced manufacturing and inspection equipment form the core of ensuring consistent and stable production throughout critical processes.
Inspect prototype samples against the approved drawing and test plan. Record fit, dimensions, connector orientation and electrical results before production release.
After the prototype samples passed adaptation and testing, we commenced mass production.
Review certificate scope, legal entity and validity dates before relying on a certification for supplier qualification.
ISO9001:2015Quality Management System
ISO14001Environmental Management
ISO45001Occupational Health & SafetyWe develop prototypes based on your practical requirements.
Specify the applicable product standards and revisions in your RFQ. Confirm supporting component documents and the scope of any management-system certificate.
We have a team of experienced design experts to help your project achieve rapid success.
All our terminals undergo cross-sectional analysis control according to product specifications.
Specify exact connector and terminal part numbers. Confirm availability, tooling and any proposed alternative before approval.
Confirm electrical test coverage, acceptance limits and the required inspection records for the project.
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.
Send the drawing and revision, circuit or pinout list, wire sizes, connector and terminal part numbers, branch lengths, quantities and application requirements. Include the operating environment and target schedule. If a specification is missing, describe the open question rather than assuming an equivalent component. See our customization process before submitting an RFQ.
MOQ is confirmed for each design after reviewing components, tooling, assembly work and purchasing constraints. Prototype quantities and production quantities may have different cost structures. Send your expected order quantity and annual demand so JinHai can confirm the applicable minimum and quotation; this page does not establish a fixed MOQ.
Request samples against an agreed drawing revision and acceptance plan before releasing production. Confirm sample quantity, component availability, tooling, charges and any credit against a later order in the written quotation. Sample approval should cover fit, connector orientation, branch dimensions, pinout and the tests required for your application.
A delivery schedule depends on drawing approval, connector and wire availability, tooling, sample verification, order quantity and shipping arrangements. Request separate dates for engineering review, sample completion and production shipment. JinHai must confirm these dates for the specific order; generic lead-time ranges are not a delivery commitment.
A typical sequence is specification review, material preparation, cutting and stripping, termination, subassembly, routing and protection, inspection, electrical testing and packaging. The applicable process depends on the design. See JinHai’s production process and agree the controls required for your assembly before release.
Continuity testing checks whether the specified electrical paths are connected and can identify opens, shorts or incorrect pin assignments when the fixture and program are configured accordingly. It does not by itself establish insulation performance, current capacity, sealing or service life. Agree the circuit map, limits and required test coverage before production.

A custom wire harness quotation depends on the defined design and scope. Branch layout and length, connector and terminal selection, wire and protection materials, assembly operations, inspection and…
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Moving seat and door wiring harness routing should be defined against the vehicle program’s approved motion envelope. A route must remain controlled as the assembly moves, with clear…
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To compare custom wire harness quotes fairly, confirm that every supplier priced the same part number, drawing revision, bill of materials (BOM) and quantity basis. Then compare what…
Read More ›Send your requirements for an engineering and quotation review.
sales@jinhaiharness.comWhatsApp +86 18201157907