Premier Manufacturer
Seeking a trustworthy automotive wire harness manufacturer? At Romtronic, we specialize in designing and producing custom car wire harnesses tailored to your requirements. Whether you’re working on electric vehicles, off-road trucks, or smart car platforms, our solutions deliver performance, durability, and flexibility where it counts.
Our customized car wiring harnesses
Below are some of the custom automotive wiring harness products we produce. For more product images, please don’t hesitate to contact us; we will be happy to share them with you.
Product Advantages
Our automotive wire harnesses are engineered to meet the highest quality and safety standards. We offer:
- Complete customization options: choose the optimal wire length, gauge, and connector types to suit your application.
- OEM & ODM support for a diverse, global clientele.
- Rigorous testing procedures covering continuity, high-voltage performance, and insulation resistance tests.
- Compliance with RoHS and ISO/TS 16949 standards to ensure the utmost reliability.
As a dedicated automotive wire harness manufacturer, we understand the critical demands of automotive applications. Our products are built using high-performance cables, durable sheathing, and secure connectors, ensuring exceptional reliability in even the most challenging environments.
Areas of application
Our harnesses are widely used in:
- Passenger cars and commercial vehicles
- Electric vehicles (EVs) and hybrid cars
- Heavy-duty trucks and off-road machinery
- Navigation, lighting, dashboard, and control systems
Partner with a trusted automotive wiring harness manufacturer that knows your industry and delivers on time, every time.
Types of car wiring harness
There are 11 types of automobile wiring harnesses: Engine 2nd wiring harness, Engine room wiring harness, Main wiring harness, Left front door wiring harness, Body wiring harness, Left rear door wiring harness, Taillight wiring harness, Interior light wiring harness, Right rear door wiring harness, Right front door wiring harness, and E.F.I. wiring harness. The vehicle’s LHD and RHD are different since the wiring harness circuit position is a signal. Please refer to the LHD and RHD pictures below to distinguish between them precisely.
LHD and RHD vehicles have slightly different wiring harness circuit locations, please see the pictures below.
Frequently Asked Questions (FAQs)
Q1: What’s included in a custom car wire harness?
A custom harness includes wires, connectors, terminals, tubing, sleeving, and labels—built to your layout and voltage requirements.
Q2: Do you offer sample production before mass orders?
Yes. We support prototyping for testing and fitment before scaling to mass production.
Q3: What is your typical lead time?
Prototypes: 5–7 days.
Mass production: 2–3 weeks depending on complexity and order size.
Q4: Can you match harnesses from existing samples?
Absolutely. You can send us your sample, and we’ll reverse-engineer it for exact match or improvement.
Q5: What vehicle types can you support?
We support wiring for EVs, ICE vehicles, ATVs, off-road vehicles, motorcycles, classic cars, and more.
Get in Touch for Custom Automotive Wiring Solutions
With years of experience serving the automotive industry, Romtronic delivers high-quality, reliable custom wire harnesses for a wide range of applications — from main power distribution and in-vehicle entertainment systems to sensor controls and CAN communication.
To request a quote or sample, feel free to reach out to us directly — our engineering team will get back to you within 12 hours with expert support and tailored solutions.
You can also reach us at:
📧 Email: info@romtronic.com
📞 Phone: (+86) 199-2816-5824
We look forward to being your trusted partner for automotive wire harness solutions.