Custom Wire Harness & Cable Assembly Manufacturer | Automotive, Medical, Industrial

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Flexible production lines: small-batch trial runs + mass production

20-35 days fast delivery for custom orders

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Wire Harness

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Manufacturing Process

From raw materials to reliable wire harnesses，a transparent, step-by-step process that ensures precision, safety and quality.

Material Selection

We source certified raw materials from trusted suppliers, ensuring RoHS and REACH compliance. Every wire, connector, and terminal is selected for safety, durability and performance.

Wire Processing

Automated cutting, stripping and crimping machines deliver ±0.1mm accuracy. Each wire is processed to match exact design specifications, minimizing errors and ensuring consistency.

Harness Forming & Binding

Harnesses are arranged and bound on 1:1 scale boards according to client drawings. Proper routing and binding improve durability, reliability and ease of installation.

Soldering & Assembly

Both manual and automatic soldering techniques are applied for complex layouts. Skilled technicians ensure reliable connections and high production efficiency.

Quality Inspection

Every harness undergoes 100% inspection, including: Continuity Test High-Voltage Test Pull Test Salt Spray Test Environmental Reliability Test

Packaging & Delivery

Harnesses are labeled with traceability codes and securely packaged for export. With global logistics support, we ensure on-time delivery and responsive after-sales service.

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Why Choose Us

We understand your challenges — that's why our solutions are built to ensure quality, speed and reliability.

Your Challenges	Our Solutions
⚠Inconsistent quality, incomplete inspections	þ100% functional & reliability tests with traceable reports
⚠Long sampling cycle, unstable lead time	þFast prototyping in 3–7 days with flexible MOQ
⚠Complex wiring layout and connector issues	þEngineering support for layout & connector optimization
⚠No traceability or compliance documents	þIATF16949 workflow with RoHS/REACH & full traceability

Production Workflow
Our automotive wire harness production follows a strict 6-step process:
1、Engineering evaluation & design
2、Material selection & BOM preparation
3、Sample prototyping & tooling
4、Mass production with semi/full automation
5、100% functional & reliability testing
6、Custom packaging & on-time global delivery

	Quality Assurance All our automotive wire harnesses comply with IATF16949, ISO9001 & BSCI. Every batch undergoes: * Salt spray testing * Insulation resistance & continuity check * Pull force & bending cycle tests * EMI & ESD protection inspection

Manufacturing Capabilities

Wire Range: 0.13mm² to 6mm²	In-house Processes: Crimping, molding, ultrasonic welding
Voltage Support: 12V / 48V / 600V+	Testing: Salt spray, pull force, continuity, vibration
Connector Brands: TE, JST, Yazaki, Molex, Aptiv	Automation: >85% automation in key processes

Joytrain specializes in OEM headphone and wire harness manufacturing, offering high-quality, customizable audio and more electronic solutions to meet diverse market needs.