Custom Wire Harness Manufacturer
As a leading manufacturer of high-quality, cost-effective wire harnesses, Romtronic specializes in custom solutions for automotive, medical, and industrial applications, ensuring top performance, reliability, and compliance with IATF16949 and ISO 13485 standards.
Providing customised requirements

Would you like a custom wiring harness? Romtronic has 28 years of experience in wire harness assembly, and we have dedicated automated, semi-automated, and quality control laboratories to manufacture the highest-quality wire harnesses.
Our engineers have extensive experience and skills in designing and customizing wire harnesses according to customer requirements. They ensure that they always reliably connect to the equipment and meet the requirements of specific applications.
With over 20 industry patents and multiple quality system certifications, we can handle any custom wire harness order according to your ODM and OEM requirements.
We can provide expert support and service if you need a complex wiring solution. Please contact our sales team to learn more about our wire harness assembly services.
Our wiring harness manufacturing process

1. Design and Prototyping
Custom designs are created to customer specifications, followed by prototyping to validate performance and ensure a proper fit.
2. Wire Processing and Pre-Assembly
Raw wires are cut and stripped, then prepared for assembly through threading silicone tubing and inserting connectors.
3. Crimping and Riveting
Terminals are crimped to wires using mechanical devices, and in some instances, rivets are used to ensure a secure connection.
4. Assembly and Final Assembly
Wires are assembled into their final form according to the drawings, including board layout, wiring, and packaging, and installing sizable corrugated tubing on the main line.
5. Quality Control and Electrical Testing
Finished products are inspected for dimensions and aesthetics to ensure compliance with specified standards. Subsequently, circuit continuity is verified using electronic testing instruments.
Our Advantages

- Strong Strength: 28 years of OEM/ODM production experience; customers include Siemens, Amphenol, Bosch, and other world-top brands.
- Complete certifications: UL, MFi, IPMS, ISO9001, ISO13485 (medical), IATF16949 (automotive) certification, etc.
- Experienced team: Our skilled engineers can quickly process orders from concept to drawing to wiring to final mechanical assembly.
- Competitive price: Customized wiring harnesses are of the best quality at the best price.
- Quality assurance: Attention to detail, 300% quality inspection, zero defect products.
- After-sales service provided: European localized after-sales service and technical support.
- Fast delivery: 100% on-time delivery, late penalty agreement.
- Best service: 7/24 hours of online customer service to help you solve any problems or concerns with your order.
- Accept small orders: starting quantity 50 pieces or total value over $100.
The Factory







Application areas
Our custom wire harness can be used in different industries, including automotive, trailers, electronic equipment, robotics, medical devices, telecommunications equipment, home appliances, and large industrial machinery. We utilize state-of-the-art automation equipment and precision craftsmanship to ensure that each harness meets the highest quality standards. No manufacturer is better equipped to meet your unique cable requirements.
Frequently Asked Questions
1. What is your typical lead time for custom wire harnesses?
Lead times vary depending on the complexity and order quantity. Most orders are completed within 2–4 weeks. If you have a tight schedule, please let us know—we’re happy to discuss expedited options.
2. Can you quote without drawings or technical files?
We can provide a quote based on your specifications—even if you don’t have formal drawings. You can send us photos, samples, or a basic description. To help us quote accurately, please include:
Wire lengths and wire type
Connector types or part numbers
Quantity
Any special requirements (e.g. shielding, labeling, overmolding)
You can submit your request via our website or email our sales team directly.
3. Do you offer samples or prototypes before full production?
Yes, we can provide samples or prototypes for your review. We proceed with mass production only after you approve the sample to ensure everything meets your expectations.
4. What are your shipping and delivery options?
We offer flexible shipping solutions based on your location and urgency. Options include express couriers, air freight, and sea freight. Shipping methods and costs will be included in your quote.
5. What is your production capacity?
We support both small batches and large-scale production. Our flexible manufacturing system allows us to scale quickly while maintaining consistent quality.
6. Can you help with wire harness design or optimization?
Yes. Our engineering team can assist with design suggestions, material selection, and redesigns to improve performance or reduce cost.
7. What industries do you serve?
We supply wire harnesses for various industries, including automotive, industrial equipment, medical devices, consumer electronics, and more.
8. How do you ensure quality?
All products go through 300% inspection and testing before shipping. We follow strict quality control processes and are ISO certified.
OUR CLIENT






Get A Wire Harness Quote Today!
Every harness we make is carefully crafted, rigorously tested for quality, and designed to last. Let’s talk about your project—request a quote today!