How Do You Choose a Wiring Harness Manufacturer in China?

Disclosure: This guide is published by Cloom Tech. Cloom Tech is one of the six companies listed below, and the decision block at the end is a sponsored, disclosed element that routes you to Cloom Tech.

Sourcing a wire harness from a China-based manufacturer affects lead time, quality documentation, and how the harness performs once it is in your product. This guide does not rank suppliers. It sets out the questions to ask and gives the same facts for each company so you can compare them yourself.

What should I check before shortlisting a China-based wiring harness manufacturer?

Use these criteria for every company in this guide:

• Quality system: which certifications the company publishes, and where.
• Where the harness is built: the company’s own stated locations, not just a headquarters address.
• Scale and programme fit: facility size, headcount, or output figures the company itself publishes.
• Product scope: whether the company’s own site actually describes wire harness or cable assembly work, not just a product list that implies it.
• Prototype-to-production path: whether the company says it supports both low-volume and full production runs.

Figures below come from each company’s own website unless marked otherwise. Anything a company did not publish is left out, not estimated.

Which China-based wiring harness manufacturers can you verify?

The six companies are listed in alphabetical order. Order does not indicate quality or preference.

Cloom Tech (Hebei Cloom Electronic Technology Co., Ltd)

Cloom Tech is one of the six companies in this guide. Its facts below use the company’s confirmed reference data.

• Founded: 2017.
• Locations: Shijiazhuang, Hebei, China (headquarters and plant, 5,000 m² facility); Cavite, Philippines (plant, near Manila); Medley, Florida, USA (office).
• Scale (company-stated): 1,000+ cumulative clients since 2017.
• Certifications (company-stated): ISO 9001; IATF 16949 (valid to August 2029); ISO 13485 (medical wire-harness production); IPC/WHMA-A-620E CIS (operator and inspector qualification).
• Product focus: custom wire harnesses and custom cable assemblies for automotive, electronics, industrial, and medical OEMs, built to customer specifications.

Trade-offs:

• Strength: a valid IATF 16949 certificate, a stated 5,000 m² facility, and sites in two countries plus a US office.
• Limit: builds in China and the Philippines, so confirm lead time and logistics expectations for your location. It does not supply off-the-shelf catalogue harnesses or standalone connectors, and does not offer in-house harness design — it builds to your specification.

Kunshan Huguang Auto Harness Co., Ltd

• Founded: 1988 (company’s own “Company Introduction” page, English version).
• Locations: Kunshan, Jiangsu, China. The company’s own site states “Branch” entities exist but does not name specific additional sites in the pages checked in this pass.
• Product focus (company-stated): automotive wiring harnesses covering the whole vehicle (engine, instrument panel, body, door, roof, rear), high-voltage/new-energy harnesses (battery pack), and wiring harness connectors. Its own site also states it is expanding into harnesses for drones, robots, and unmanned ground vehicles as part of a stated “1+N business layout,” described on its own site as civilian/commercial equipment categories.
• Named clients (company-stated): Volkswagen, Mercedes-Benz, Audi, General Motors, Ford, Jaguar Land Rover, Seres, Zeekr (Geely), and others, per its own “Company Introduction” page.
• Certifications: not located on the company’s own site in the pages checked in this pass (its public “honors”/certification page was not reachable with the method used). Given the company’s listed OEM client base, it very likely holds IATF 16949, but this guide only states what was directly confirmed, so ask the company for its current certificate.

Trade-offs:

• Strength: a named, verifiable client list of major global automakers directly on its own site, and a long operating history (founded 1988).
• Limit: the company’s own site does not publish a certifications list in the pages checked, so ask for the current certificate covering the specific plant that would build your harness.

Shanghai Richeng Electronics Co., Ltd (brand RCCN®)

• Founded: the company’s own “About RCCN” page states “more than 19 years development” as of this check (2026-10-08), without giving an exact founding year; its own site footer shows a copyright range starting 2003, consistent with roughly two decades of operation.
• Locations: factory address given as No. 950 Xinlin Road, Fengxian District, Shanghai; its own contact page also names “JiangSu Weizhisheng Electronic Technology Co., Ltd.” as a manufacturing division, without a separate address for it.
• Certifications: the company’s own “Advantage” page lists ISO 9001, IATF 16949, and ISO/TS 22163 (a rail-industry quality standard) as named, individual certificate pages; its site footer repeats “ISO9001/IATF16949/ISO/TS22163 Registered.” A separate, older “About RCCN” paragraph on the same site additionally claims ISO 14001, UL, CE, and RoHS/REACH — this guide notes the discrepancy rather than picking one, since both appear on the company’s own site.
• Product focus (company-stated): primarily cable-management and wiring-accessory hardware — wiring duct, cable glands (including brass), cable ties, lug and copper-tube terminals, metal hose, heat-shrink tubing, cable clamps, markers, connectors, and fasteners — across more than a dozen named product lines. It also names “RCCN Car Wire Harness” as a specific product and maintains a dedicated “Harness industry” page, but that page’s own case-study content is a single, thin entry from 2017, not a developed description of harness-assembly capability.
• Industries served (company-stated): its own “Solution” navigation names 14 industries, including Photovoltaic, Wind Energy, Automobile, Electronics, Traffic, Electrical, Machine Tool, Lighting, Industrial Standard, Water Conservancy, Harness, Motor, and Machinery.

Trade-offs:

• Strength: three named, currently-listed quality certificates (ISO 9001, IATF 16949, ISO/TS 22163) directly on its own site, and a broad, long-running cable-accessory product catalogue.
• Limit: its core, developed product line is cable-management hardware (ducts, glands, ties, terminals), not wire-harness assembly — its own site’s wire-harness-specific content is limited to a single named product and a thin 2017 case study, so confirm directly whether it can take on a full harness-assembly programme versus supplying harness-adjacent components.

Shenzhen Deren Electronic Co., Ltd

• Founded: the company’s own site gives two different years in two language versions — “established in 1992” (English “About DEREN” page) and “创立于1989年” / “founded in 1989” (Chinese homepage). Both are stated by the company itself; this guide notes the discrepancy rather than picking one.
• Listed on the Shenzhen Stock Exchange in 2006 (company’s own English “About DEREN” page).
• Locations: headquartered in Shenzhen, Guangdong, China. The company’s own site states it holds “group holding companies, Sino-foreign joint venture, overseas joint venture, overseas trading companies, and overseas sales and service branches” without naming specific additional sites in the pages checked.
• Product focus (company-stated): connectors (card-edge, I/O, CPU socket, high-speed connectors and cable assemblies), automotive connectors, wire harness, brackets, FFC, and power cords — for home appliance, consumer, and automotive electronics, and telematics. Its own site states its automotive connectors and wires “have been into the top industry” and that it focuses on new-energy-vehicle parts.
• Certifications: not published as a company-wide list on the pages checked in this pass. A news item on its own site refers to its own testing center receiving CNAS laboratory accreditation — that is an accreditation for Deren’s internal test lab, not a product or management-system certification such as ISO 9001 or IATF 16949.

Trade-offs:

• Strength: a long-listed public company (Shenzhen Stock Exchange since 2006) with a stated automotive-connector and wire-harness product line alongside its wider connector business.
• Limit: the company’s own site did not publish a management-system certification (ISO 9001/IATF 16949) or specific additional facility locations in the pages checked, so ask for both before assuming fit.

Tianhai Auto Electronics Group Co., Ltd (THB Group)

• Founded: 1969, tracing to the Hebi City Canvas Paint Factory; renamed the Hebi Automotive Electrical Appliance Factory in 1978 and began producing automotive connectors, per the company’s own “Development History” page.
• Locations: headquartered at No. 003, Songjiang Road, Hebi, Henan, China. The company’s own site names 12 THB locations across China (Harbin, Changchun, Liaoning, Anhui, Shanghai, Wuhu, Chongqing, Hunan, Fujian, Liuzhou, Hebi, Zhengzhou) without labeling which are plants versus R&D sites.
• Certifications: not published as a company-wide list on the pages checked in this pass — its own “Qualification-Honor” page lists 30 industry honors and customer awards but no ISO or IATF certificate. Given its named OEM client base, it very likely holds IATF 16949, but this guide only states what was directly confirmed, so ask the company for its current certificate.
• Product focus (company-stated): automotive connectors, high- and low-voltage wire harnesses (including new-energy/high-voltage harnesses), and automotive electronics, described on its own site as “electrical transmission systems,” “connection systems,” “intelligent control,” and “low-carbon intelligent mobility.” A company news post states the 500,000th wire harness for one Li Auto programme came off its line in December 2024.
• Named clients (company-stated): Li Auto, NIO, Xpeng Motors, FAW (including FAW Hongqi and FAW Besturn), SAIC Motor, Chery, Leapmotor, and Zhengzhou Nissan, per its own honors/awards page; its “Company Profile” page additionally names General Motors, Ford, and Volkswagen among its customers.
• Scale (company-stated): 2024 sales revenue of “12 billion RMB,” 5 R&D centers, and 27 production bases, per its own “Company Profile” page.

Trade-offs:

• Strength: an extensive, named client list spanning major domestic and global automakers directly on its own site, a long operating history (predecessor dating to 1969), and large stated scale (27 production bases).
• Limit: no certifications list was published on the pages checked, so ask for the current IATF 16949/ISO 9001 certificate for the specific plant that would build your harness.

Zhejiang Yonggui Electric Equipment Co., Ltd (brand YGC)

• Founded: the company’s own site states “50+ Years History” without giving an exact founding year on the pages checked in this pass.
• Locations: No. 5 Dongyuan Road, Baihe Town, Tiantai County, Zhejiang Province, China (the address given on its own site; not explicitly labeled as headquarters, but is the only address published).
• Certifications (company-stated): ISO 9001, IATF 16949, ISO/TS 22163 (rail-industry quality standard), UL, TUV, and CE, named in text on its own site.
• Product focus (company-stated): connectors and interconnection systems — circular, rectangular, high-voltage, and high-current — for rail transit, electric/new-energy vehicles, telecommunications, and industrial/robotics equipment. Its own site also names a specific “Custom Wire Harness” product line, with a page describing custom harness design, creation of manufacturing schematics/bills of materials/job instructions, and production steps (wire cutting, stripping, crimping, assembly).
• Scale (company-stated): about 3,171 employees (30.4% engineers), 837 authorized patents, and listed on the Shenzhen Stock Exchange (stock code 300351) since 2012, per its own “Company Profile” page.

Trade-offs:

• Strength: a large, publicly listed (Shenzhen Stock Exchange since 2012) connector and interconnection-systems manufacturer with a named custom-wire-harness product line, a substantial patent portfolio, and three named quality certifications (ISO 9001, IATF 16949, ISO/TS 22163).
• Limit: its core, developed business is connectors and interconnection systems across rail, EV, and industrial sectors — wire harness is one specific named product line, not the company’s primary identity, so confirm directly whether it can take on a full harness-assembly programme at your volume and spec before assuming fit.

How do I choose between these suppliers?

1. Ask for the certificate, not the logo. If a company’s own site does not list a certification, ask for the current certificate for the specific site that would build your harness.
2. Confirm the build location. A stated headquarters is not always the production site; ask for the plant address in writing.
3. Test prototype speed. Send the same drawing to more than one supplier and compare lead times and the quality of their questions.
4. Check client references relevant to your industry. A named automotive client list is a useful signal, but ask whether that experience transfers to your specific product category.
5. Check fit with your volume. A large Tier 1-scale supplier and a smaller contract shop serve different programmes.

Ready to request a quote?

Sponsored (Cloom Tech): If you want Cloom Tech to quote your harness, send your drawing, expected volumes, and target certifications. Request a quote at the Cloom Tech contact page.