China Custom Wiring Harness Assembly Manufacturer
OurPCB is a China-based custom wire harness manufacturer serving design engineers and procurement teams across automotive, EV, aerospace, medical, and industrial sectors. We produce harnesses from prototype quantities to high-volume production runs, with 100% electrical testing on every assembly and full IPC/WHMA-A-620 compliance throughout.
What are Custom Wire Harnesses?
A custom wire harness is an organized bundle of electrical wires, connectors, and terminals engineered to transmit power and signals between specific components in a defined system. Unlike loose cable assemblies — which are individual cables with terminations — a wire harness integrates multiple conductors into a single protected unit with sleeving, routing fixtures, and strain relief built in. That distinction matters at assembly: harnesses install as a single plug-and-play unit; loose assemblies require individual routing and connection at the point of use.
Custom harnesses are designed around your exact application. Pin count, conductor gauge, insulation material, connector series, and environmental protection rating are all specified to match your operating conditions — not adapted from a standard product.
OEM and ODM Manufacturing Capabilities
We support both OEM and ODM production models, and the distinction matters for your project timeline and tooling investment.
OEM production replicates an existing design to your supplied drawings and specifications. Lead times are shorter because no design development is required. This model suits teams with finalized designs who need a reliable manufacturing partner.
ODM production involves developing a new harness design from your functional requirements. Our application engineering team works from your electrical schematic, environmental specifications, and mechanical constraints to produce a complete harness design. This model suits R&D teams and OEMs who need a manufacturing partner involved from the design stage.
Both models include full documentation: assembly drawings, bill of materials, test reports, and traceability records. NDAs are available before any design information is shared.
Both models include full documentation: assembly drawings, bill of materials, test reports, and traceability records. NDAs are available before any design information is shared.
Our Custom Wiring Harness Features
Every OurPCB wire harness is built from materials selected for your specific application environment. We do not use one-size-fits-all approaches—your operating conditions determine your material specification.
Tyco, AMP, Delphi, Molex, JAE, JST, Hirose, Amphenol, TE Connectivity, and more. We also support custom overmolded connector assemblies for automotive, agricultural, and medical applications.
PVC, nylon, XLPE, rubber, braided sleeving, heat shrink tubing—selected based on abrasion, oil, heat, or water-resistance requirements.
Gauges from 40 AWG to 120 mm², voltage ratings to 600V, temperature resistance from −65°C to +200°C, and multi-conductor structures supporting up to 50 cores.
IP67/IP68 waterproof sealing, UV-resistant jacketing, and chemical-resistant insulation for outdoor and industrial deployments.
All materials are sourced from qualified suppliers and verified for RoHS, REACH, and hazardous substance compliance before entering production.
All materials are sourced from qualified suppliers and verified for RoHS, REACH, and hazardous substance compliance before entering production.
Why Partner With OurPCB
Wire harness quality is determined before production starts — by how well the design is reviewed, how consistently crimping force is monitored, and how rigorously assemblies are tested before they ship. Our manufacturing process is built around those control points, not around them.
We operate our own factory, control every step from material sourcing through final inspection, and maintain documented traceability on every assembly. Our cross-section analysis capability verifies crimp quality at the microscopic level — beyond what visual inspection alone can confirm.
- One-stop wire harness supplier eliminates compatibility issues between circuit boards and connecting harnesses
- Streamlined supply chain reduces coordination problems and ensures on-time delivery
- 100% electrical testing on every project ensures perfect continuity and connection
- Our quality management system includes cross-section analysis technology that verifies crimping quality at microscopic levels
- High-quality wire harnesses for electric vehicle battery cables and industrial power applications
- Advanced shield techniques for sensitive signal protection that meet or exceed industry standards
- Quick-turn prototype development with first articles delivered within days rather than weeks
- Scalable manufacturing from small runs to high-volume production across a wide variety of industries
The Benefits of Custom Wire Harnesses
Custom wiring offers critical advantages for electronic systems across various industries.
These benefits directly impact your products’ reliability, assembly efficiency, and long-term performance.
- Organized wiring eliminates short circuits and connection failures that cause electromagnetic interference and system malfunctions
- Protected interconnect systems resist environmental damage from moisture, heat, chemicals, and vibration
- Plug-and-play connections reduce assembly time by up to 60% compared to loose cable assemblies
- Clear wire identification and routing make troubleshooting and repairs faster for any installer
- Compact, organized bundles maximize space efficiency in tight installation areas
- Optimized routing reduces overall wire length and weight—critical for aerospace and automotive applications
- Faster assembly streamlines manufacturing and reduces labor costs
- Improved reliability decreases warranty claims and field repair expenses for OEMs
Millions of business and innovators use OurPCB
Technical Capabilities
Our 10,000 square foot facility maintains ISO 9001, IATF 16949, and IPC/WHMA-A-620 standards from the Wire Harness Manufacturer’s Association, ensuring consistent quality across all manufacturing services. Our wire processing capabilities include wire gauge ranges from 30 AWG to 4 AWG, voltage ratings up to 600V, and temperature resistance from -65 °C to +200 °C.
As a manufacturer of high-quality assemblies, we support all major connector types including JST, Molex, TE Connectivity, and Hirose, with custom overmolded options for automotive, agricultural equipment, and medical applications.
The wire harness industry demands excellence, and our wire harness design and application engineering processes deliver. We offer precision cutting and stripping, automated crimping with force monitoring, and custom made automotive wiring harness solutions with specialized shielding for the industry’s most demanding environments.
Our team is dedicated to providing the best value through rigorous testing for continuity, insulation resistance, and dielectric strength. With years of combined experience, our final design verification includes pull-testing for mechanical integrity and premium wire harnesses that protect against the harshest conditions.
Capabilities & Services
- Wire Gauge: 40AWG-120mm²
- Production Capacity: 10,000 pieces/hour
- Wire Cutting Service
- Wire Stripping Service
- Wire Marking Service
- Label Types
- Wire Ends Treatment
Custom Wire/Cable Service:
- Wire/Cable types
- Wire gauge
- Wire/Cable length
- Insulation/Jacket color
- Core numbers etc.
Custom Cable Assembly Capacities:
All kinds of cable assemblies including
- Electrical cable assembly
- Coaxial cable assembly
- Multi-core cable assembly
- Connector to board cable assembly
- Automobile communication cable assembly
- Power transmission cable assembly
More Custom Wire Harness Manufacturing Services
Our custom wire harness manufacturing services cover a wide range of industries and specialized needs. From automotive and truck harnesses built for reliability under demanding conditions to marine solutions designed to withstand harsh environments, we ensure durability and precision. We also offer OEM harness manufacturing tailored to exact specifications, as well as tractor harnesses engineered for agricultural efficiency. For projects that require flexibility, our custom wire harness solutions provide tailored configurations to meet unique applications. With expertise across multiple sectors, we deliver consistent quality, performance, and long-term dependability.
Mon-Fri: 24 hours,
Sat: 9am-6pm, GMT+8
Reach us at
[email protected]
24 hours online
+86-199-30589219
Mon-Fri: 24 hours,
Sat: 9am-6pm, GMT+8
Custom Wiring Harness Manufacturer FAQs
What are your lead times for custom wire harnesses?
Prototype lead time is seven days for first articles. Production orders ship in 15–20 days depending on complexity, volume, and connector availability. High-voltage EV harnesses and assemblies requiring custom tooling may require additional lead time — your project manager will confirm the schedule at quoting.
How does OurPCB ensure wire harness quality?
Every assembly is built to IPC/WHMA-A-620 workmanship standards by certified technicians. Quality control includes 100% electrical testing for continuity, insulation resistance, and dielectric strength, with documented results for full traceability. We perform regular cross-section analysis to verify crimp compression at the microscopic level. Pull testing confirms mechanical integrity on all terminated connections. Final inspection covers visual workmanship, connector seating, and labeling accuracy before packaging.
Do you offer non-disclosure agreements (NDAs)?
Yes. We provide non-disclosure agreements before any design files, schematics, or proprietary specifications are shared. IP protection is a standard part of our customer onboarding process, not an exception.
What is your production capacity?
We can handle small orders as well as large-scale production requirements without compromising on quality. No order is too big or too small.
Can OurPCB integrate wire harnesses with PCB assembly?
We specialize in combined PCB and wire harness manufacturing, producing complete electronic assemblies from a single source. This eliminates compatibility issues between the board and the harness, simplifies your supply chain, and gives our application engineering team visibility into both sides of the electrical system. The result is faster integration and fewer revision cycles during assembly.
What information do I need to provide for a wire harness quote?
Provide your application environment — temperature range, moisture exposure, vibration conditions, and any IP rating requirements. Include electrical specifications: voltage, current, and signal types. Specify connector preferences, pin count, and required quantities. Assembly drawings or schematics significantly improve quote accuracy. If you have certification requirements — automotive, medical, aerospace — include those as well. The more complete your RFQ, the faster we can return an accurate price.
What is the minimum order quantity?
Sample orders are available from a single piece. Pilot production typically starts at 50–100 pieces. Volume production pricing applies from 500 pieces upward. MOQ depends on connector type and harness complexity — contact us with your specifications for a tiered quantity breakdown.
