Automotive Wiring
Connector leads and branched harnesses for vehicle electrical assemblies. Share the vehicle application, connector references, pin-out, routing and environmental requirements so the design can be reviewed before sample approval.
Custom Wire Harness & Cable Assembly Manufacturer (OEM/ODM)
TONFUL Electric specializes in the design, prototyping, and mass production of high-reliability Custom Wire Harnesses and Cable Assemblies. From simple point-to-point cables to highly complex, multi-branch electrical harnesses for automotive, industrial machinery, and home appliances, we provide complete end-to-end OEM and ODM manufacturing solutions.
What sets TONFUL apart is our vertical integration. Because we manufacture our own premium connectors, terminals, heat shrink tubing, and cable ties in-house, we eliminate middleman markups and supply chain delays. Fully compliant with IPC/WHMA-A-620 standards, our automated assembly lines and strict 100% continuity testing ensure every harness delivers flawless power and signal transmission, perfectly tailored to your engineering drawings.
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Custom Wire Harness & Cable Assembly Range
Explore custom wiring harnesses and cable assemblies for industrial equipment, vehicles, electronics, energy systems and solar installations. Connector interfaces, pinout, wire sizes, finished lengths and protection are specified to your drawing or approved sample. Images illustrate possible assembly configurations.
Wind Power & Industrial Equipment Wiring Harness
Automotive Wiring Harness
Railway & Communications Wiring Harness
Home Electronics Wiring Harness
Medical Equipment Wiring Harness
Intelligent Robot Wiring Harness
Flight Control Wiring Harness
Semiconductor Equipment Wiring Harness
New Energy Wiring Harness
Motorcycle Wiring Harness
Electric Bike Wiring Harness
Electric Scooter Wiring Harness
Drone Power Cable
Battery Interconnect Cable
Solar Battery Cable
Solar Panel Wiring Harness
Custom Wire Harness Applications
Explore potential wire harness applications below. Each assembly is reviewed against your drawing, BOM, connector interfaces and operating environment; an illustration does not establish product compatibility or qualification.
Industrial Automation
Organized power and signal connections for control panels and machinery. Define the routing, moving sections, connector interfaces and inspection plan to match the equipment design and service access requirements.
Home Appliances
Compact harness layouts for appliance control panels, motors and internal modules. Confirm wire lengths, connector mating, installation space and operating conditions against the approved appliance drawing.
Telecom & Electronic Equipment
Board-to-wire and module interconnect assemblies for communication and electronic equipment. Provide connector part numbers, pin assignments, cable routing and signal requirements for a project-specific review.
HVAC Equipment
Harness concepts for fan, sensor and controller interconnections. Specify the equipment interface, installation location, heat exposure and service access; suitability is confirmed for the selected components and complete assembly.
Lighting Equipment
Connector lead assemblies for lighting modules, drivers and control units. Send the electrical requirements, connection layout and installation environment so insulation, protection and assembly details can be reviewed.
Application images are AI-generated illustrations, not customer case studies or installation instructions.
Custom Wire Harness Assembly Specifications
The capability information below is retained from our existing wire harness page. Confirm the exact wire, connector, processing route, inspection criteria and documentation for your project before approving a sample or production order.
| Specification | Capabilities / Parameters |
|---|---|
| Service Type | OEM & ODM Custom Wire Harness Assembly |
| Wire / Cable Types | UL 1007, UL 1015, PTFE (Teflon), Silicone, Flat Ribbon, Multi-core |
| Wire Gauge Range | 32 AWG to 4/0 AWG (Heavy-duty battery cables available) |
| Connector Sourcing | TONFUL In-house Equivalents (Cost-saving) or Original Brand Parts |
| Processing Capabilities | Automated Cutting, Stripping, Crimping, Tin-soldering, Ultrasonic Welding |
| Protection & Binding | Corrugated Loom, Braided Sleeving, Heat Shrink Tubing, PVC Tape |
| Testing & Inspection | 100% Continuity Test, Pull-Force Test, Hi-Pot Test, Visual Inspection |
| Industry Applications | Automotive, Industrial Control, Home Appliances, Telecom, Medical |
| Certifications | ISO 9001, RoHS, REACH, CE, UL (materials) |
Wire Harness Design-to-Delivery Process
Step 1: Submit Your Design or Sample
Send us your engineering drawings (PDF, CAD), Bill of Materials (BOM), or mail us a physical sample. If you only have a concept, our engineers will help you draft the initial wire routing and connector specifications.
Step 2: Component Selection & Cost Optimization
We will review your BOM. If you specify expensive international connector brands, we will offer our precision-engineered TONFUL equivalent connectors as an option, which can slash your material costs and lead times significantly.
Step 3: Rapid Prototyping
Before mass production, we will manufacture a "First Article" prototype. We will send this sample to you for physical testing in your actual equipment to ensure cable lengths, connector mating, and flexibility are perfect.
Step 4: Tooling & Automated Setup
Once the prototype is approved, we program our automated cutting and crimping machines and prepare any necessary test fixtures or custom assembly boards (nail boards) for multi-branch harnesses.
Step 5: Mass Production & 100% Testing
Your harnesses are assembled by our skilled technicians. Every completed unit is plugged into a computerized testing board to verify absolute electrical continuity and correct pin-out orientation.
Step 6: Custom Packaging & Delivery
We can package the harnesses according to your assembly line needs—whether that's individually bagged and labeled with your OEM part numbers, or bulk packed for immediate use. We arrange fast, secure global logistics.
Why Choose TONFUL Wire Harness
Review the manufacturing and engineering support described below alongside the requirements for your custom assembly. Product-specific performance, inspection coverage and delivery arrangements are confirmed for the approved design.
Vertical Integration Cost Savings
Why pay a third-party assembly house that buys parts from someone else? We manufacture the core components—wafer connectors, terminals, and heat shrink—right here at TONFUL. This vertical integration drastically reduces your Bill of Materials (BOM) cost and eliminates supply chain bottlenecks.
Advanced Automated Production
Our factory is equipped with state-of-the-art automatic wire cutting, stripping, and crimping machines. This eliminates human error, ensures absolute precision in wire lengths and strip dimensions, and allows for massive daily production capacities to meet your tight deadlines.
100% Strict Quality Testing
A single faulty crimp can ruin an expensive machine. We leave nothing to chance. Every single wire harness undergoes 100% computerized continuity testing for shorts and miswires. We also conduct rigorous pull-force testing to guarantee the mechanical strength of every crimped terminal.
Expert Engineering Support
Whether you have a fully finished CAD drawing, a rough hand sketch, or just a physical sample from a competitor, our engineering team can work with it. We offer reverse-engineering services and can suggest highly reliable drop-in connector alternatives to optimize your costs.
Robust Environmental Protection
We leverage our own extensive line of electrical protection products. We can equip your custom harnesses with high-temperature corrugated loom tubing, dual-wall waterproof heat shrink, or heavy-duty nylon cable ties to ensure they survive severe vibration and harsh outdoor environments.
Flexible MOQ & Fast Prototyping
We understand that R&D projects require flexibility. We offer rapid prototyping services (usually within 3 to 7 days) so your engineers can test the physical fit. Once approved, we can seamlessly scale from low-volume pilot runs to high-volume mass production.
OEM Wire Harness Requirements & Ordering
Send a drawing or sample reference, BOM, wire sizes and colours, finished lengths, connector part numbers and pin-out. Include your order quantity, application environment, inspection requirements and packaging preferences.
Engineering Information
- Drawing revision and approved sample
- Connector references and pin-out
- Wire sizes, colours, lengths and branching
- Protection, routing and test requirements
Order & Packaging Information
- Prototype, pilot-run and production quantities
- OEM part numbers and identification labels
- Individual bags or bulk packaging
- Destination and delivery requirements
Confirm sample arrangements, MOQ, component availability, packaging and delivery terms in your quotation. Contact TONFUL with your assembly requirements.
Wire Harness Workshop & Packaging
Wire Harness Assembly Workshop
Once the prototype is approved, we program our automated cutting and crimping machines and prepare any necessary test fixtures or custom assembly boards (nail boards) for multi-branch harnesses.
OEM Harness Packaging
We can package the harnesses according to your assembly line needs—whether that's individually bagged and labeled with your OEM part numbers, or bulk packed for immediate use. We arrange fast, secure global logistics.
Workshop and packaging scenes are illustrations, not photographs of an actual facility or shipment.
Wire Harness Project Support
Service Consultation
Whether your Wire Harness requirements are straightforward or complex, our team provides expert advice and technical consultation. For more intricate projects, we offer in-depth engineering support to ensure optimal product selection and application, guaranteeing safety and efficiency in your electrical systems.
Product Recommendations
Unsure which Wire Harness suits your system? Our specialists provide free, customized recommendations based on your specific operational and environmental requirements, ensuring you get the perfect fit for your electrical protection needs.
Installation Support
Need help with installation? Our technical team is available to answer your questions or provide hands-on support. For larger projects, we can even dispatch an engineer to your site for on-the-ground assistance, ensuring your Wire Harnesses are installed correctly and function seamlessly within your electrical network.
Logistics Support
If you lack a reliable freight forwarder, we can arrange transportation from our factory to your project site at no extra cost. Our logistics team ensures timely and secure delivery to keep your project on schedule, minimizing downtime and delays.
Support scenes are AI-generated illustrations, not photographs of actual staff, projects or shipments.
Custom Wire Harness: Frequently Asked Questions
What files do I need to provide for a wire harness quote?
Ideally, a 2D drawing (PDF or CAD) detailing wire lengths, gauges (AWG), colors, and the specific connector/terminal part numbers (the BOM). If you don't have drawings, clear photos with measurements or a physical sample are also perfectly acceptable.
Can you use original brand connectors (like Molex or TE), or only your own?
We can do both! If your project strictly requires original brand components, we can source them through our established supply chains. However, choosing TONFUL's drop-in equivalent connectors will dramatically reduce your costs and shorten production lead times.
What is the lead time for a custom wire harness prototype?
For harnesses using standard wires and our in-house TONFUL connectors, prototypes can typically be completed in 3 to 7 working days. If special original-brand components need to be imported, the lead time will depend on their availability.
How do you guarantee the crimp quality of the terminals?
We use high-precision automated crimping applicators. Our quality control team regularly performs "Pull-Force Testing" to ensure the wire will not pull out of the terminal, and we conduct cross-sectional microscopic analysis to verify the copper strands are perfectly compressed without air gaps.
Is there a Minimum Order Quantity (MOQ) for custom harnesses?
We are highly supportive of new projects and offer very flexible MOQs. For standard materials, we can do small pilot runs. The MOQ usually only becomes a factor if your design requires us to purchase a massive minimum reel of a highly specialized, non-standard wire color or gauge.
Request a Custom Wire Harness Quote
Share your engineering drawing, BOM or sample details with TONFUL. Tell us the application, quantity and packaging you need so we can review your custom wire harness enquiry.
Email sales@tonful.com or open the enquiry window below.