From single-prototype validation builds to 500,000+ unit annual production, PCB Insider manufactures custom wire harnesses that keep mission-critical systems running in the most demanding environments on earth — and above it. Every harness is 100% electrically tested, fully traceable, and built to IPC/WHMA-A-620 Class 3 workmanship standards.
A wire harness is far more than a bundle of wires. It is the nervous system of every machine, vehicle, and device it powers — carrying electrical signals and energy through complex routing paths, across hostile environments, and through years of continuous operation. When a wire harness fails, the entire system goes down. In an automotive braking system, a surgical robot, or an aircraft flight-control network, that failure can have catastrophic consequences.
That is why engineering teams at leading OEMs and Tier 1 suppliers choose PCB Insider as their wire harness manufacturing partner. Our vertically integrated production facility combines automated wire processing with experienced hand-assembly craftsmanship, delivering harnesses that meet IPC/WHMA-A-620 Class 3 — the highest workmanship classification in the wire harness industry. Every crimp is force-monitored, every solder joint inspected, and every finished harness 100% electrically tested before it ships.
Unlike general-purpose contract manufacturers, wire harness interconnect engineering is our specialty. Our dedicated harness design team works alongside your engineers from initial concept through production launch — performing Design for Manufacturing analysis, recommending connector and wire optimizations, and ensuring your harness design is production-ready before the first unit hits the assembly board. The result: cable assemblies and wire harnesses that install faster, last longer, and cost less at scale than designs that bypass this critical engineering review.
From simple point-to-point wiring to complex multi-branch harnesses with hundreds of circuits, our capabilities cover every aspect of wire harness design and production.
Custom multi-branch wire harnesses with up to 500+ circuits per assembly. Precision-routed breakouts, trunk lines, and sub-harness integration for automotive, aerospace, and heavy industrial equipment.
We source and integrate connectors from Molex, TE Connectivity, Amphenol, Deutsch, Delphi, Yazaki, and more. Custom pin assignments, keying, and color-coding per your engineering drawings.
Wire harnesses engineered for extreme conditions: operating temperatures from -55°C to +200°C, chemical and oil resistance, UV stability, and continuous vibration exposure in engine bays, factory floors, and outdoor enclosures.
Braided shields, foil wraps, twisted pairs, and hybrid shielding configurations for signal integrity in safety-critical systems — from automotive ADAS sensors to MRI-compatible medical harnesses.
Precision board-to-wire and board-to-board harness assemblies with fine-pitch connectors, SMT headers, and controlled-impedance wiring for tight-space electronics integration.
Application-specific wire selection including PTFE, silicone, cross-linked polyethylene, Tefzel, and mil-spec M22759. UL/CSA listed wire from 30 AWG to 4/0 AWG for power and signal applications.
From 10-piece prototype runs to 500,000+ annual production volumes. Dedicated production cells with programmable cutting, stripping, and crimping stations ensure consistent quality at any volume.
Complete secondary operations: heat-shrink tubing, wire identification marking, spiral wrapping, convoluted tubing, mounting brackets, grommets, and custom packaging for assembly-line integration.
Every wire harness is 100% electrically tested for continuity, insulation resistance, and dielectric withstand. Automated test fixtures with pass/fail data logging ensure zero-defect shipments.
| Parameter | Specification |
|---|---|
| Circuit Count | 1 – 500+ circuits per harness |
| Wire Gauge Range | AWG 30 to AWG 4/0 |
| Harness Length | 100mm – 25m+ (custom routing) |
| Operating Temperature | -55°C to +200°C |
| Voltage Rating | Up to 1000V DC |
| Current Capacity | Up to 300A per circuit |
| Connector Systems | Molex, TE, Amphenol, Deutsch, Yazaki, JST |
| Wire Types | PVC, PTFE, silicone, XLPE, Tefzel, mil-spec |
| Protection | Braided loom, split tubing, spiral wrap, conduit |
| IP Rating | Up to IP69K (sealed connectors) |
| Quality Standard | IPC/WHMA-A-620 Class 2 & 3 |
| Prototype Lead Time | 5–7 business days |
| Production Lead Time | 2–4 weeks (volume dependent) |
Our manufacturing facility is equipped to produce every category of wire harness — from high-temperature engine harnesses to precision signal-grade assemblies.
High-temperature wiring harnesses for engine compartments, transmissions, and exhaust systems using PTFE and silicone-insulated wire rated to 200°C+.
Dashboard, door, seat, and trunk wiring harnesses with CAN bus, LIN bus, and Ethernet integration for modern vehicle architectures.
High-current harnesses for battery connections, fuse boxes, relay panels, and power distribution modules with proper wire sizing and fuse coordination.
Low-voltage, shielded harnesses for sensor networks, control signals, and high-speed data transmission with controlled impedance and twist-rate specifications.
Pre-assembled wiring harnesses for electrical panels, control cabinets, and junction boxes — DIN rail compatible with ferrule terminations and ring/spade lugs.
Quick-turn prototype harnesses for product development, design validation, and pilot production. Identical materials and processes as full production for reliable test results.
A disciplined 6-step manufacturing process — refined over thousands of unique harness programs — that ensures every wire harness meets your engineering requirements and quality expectations.
Submit your schematic, wire list, or engineering drawing. Our harness engineering team performs a comprehensive Design for Manufacturing (DFM) review — identifying routing improvements, connector consolidation opportunities, and cost-reduction strategies that maintain or improve reliability.
We produce prototype harnesses within 5–7 business days using the same processes and materials as production. A full-size harness board is built to your routing specifications, and each prototype undergoes complete electrical testing before shipment.
Receive a comprehensive First Article Inspection (FAI) package including dimensional reports, electrical test data, material certifications, and photographs. For automotive programs, we provide full PPAP Level 3 documentation including control plans and PFMEA.
Custom harness assembly boards are built to match your routing geometry exactly. Programmable wire processing equipment is set up for automated cutting, stripping, and crimping with crimp force monitors ensuring every termination meets IPC/WHMA-A-620 standards.
Trained operators assemble harnesses on dedicated boards following work instructions with visual aids. In-process quality checks verify crimp heights, pull-test values, wire routing, and connector seating at each station before the harness advances.
100% electrical testing on automated test fixtures verifies every circuit for continuity, shorts, and insulation resistance. Final visual inspection per IPC/WHMA-A-620 workmanship criteria. Custom packaging with lot traceability and certificates of conformance.
Our custom wire harnesses serve mission-critical applications across the world's most regulated and demanding industries.
Engine compartment harnesses, body wiring, dashboard assemblies, battery management system (BMS) wiring, EV charging infrastructure harnesses, and ADAS sensor connections meeting IATF 16949 and OEM specifications.
Cockpit wiring harnesses, avionics interconnects, engine nacelle harnesses, UAV power distribution, and ground support equipment wiring manufactured to AS9100, MIL-DTL-27500, and NEMA WC 27500 standards.
Patient monitoring system harnesses, surgical robot wiring, diagnostic imaging interconnects, laboratory instrument wiring, and hospital bed control assemblies compliant with ISO 13485 and IEC 60601 safety standards.
CNC machine tool harnesses, robotic arm wiring, conveyor system controls, PLC panel wiring, and HVAC system harnesses engineered for 24/7 operation in harsh factory environments with oil, coolant, and vibration exposure.
Solar inverter harnesses, wind turbine nacelle wiring, battery energy storage system (BESS) interconnects, and EV charging station harnesses designed for outdoor installation with UV-resistant materials and IP67+ sealing.
Vessel engine room harnesses, navigation system wiring, construction equipment harnesses, and agricultural machinery wiring built with tin-plated conductors, waterproof connectors, and corrosion-resistant materials for saltwater and extreme weather exposure.
“Wire harnesses are the lifelines of modern machines. A single poorly crimped terminal can ground an aircraft, shut down a production line, or compromise patient safety. That's why we treat every harness — whether it's a 5-wire prototype or a 500-circuit production run — with the same IPC Class 3 rigor. Our customers don't just buy wire harnesses from us. They buy the certainty that their systems will perform.”
Every wire harness manufactured to IPC/WHMA-A-620 workmanship standards — the global benchmark for cable and wire harness assembly quality. Class 3 capability for high-reliability aerospace, defense, and life-critical medical applications.
Our quality management system is ISO 9001:2015 certified, governing all manufacturing operations from incoming material inspection and supplier qualification through in-process controls and final shipment verification.
Every crimped termination is monitored in real-time by crimp force analysis systems. Crimp signatures are compared against validated parameters — any deviation triggers an automatic reject and alerts the quality team.
Automated test fixtures verify continuity, isolation, and hi-pot (dielectric withstand) on every wire harness. Test results are digitally recorded and linked to each harness serial number for full traceability.
Full PPAP Level 1–5 documentation for automotive programs. APQP project management including DFMEA, PFMEA, control plans, MSA studies, and Cpk process capability analysis for critical characteristics.
Every wire harness is serialized with full lot-level traceability of wire, connectors, terminals, and assembly operators. Barcode-linked records enable instant containment and root cause analysis if any quality issue arises.
To provide an accurate quote, we need your wire harness drawing or schematic showing the circuit layout, wire types/gauges, connector part numbers, branch routing with dimensions, and any special requirements (shielding, temperature rating, environmental sealing). If you're in the early design phase, even a rough hand sketch or a wire list with connector information is enough for us to start an engineering review and budgetary estimate.
Standard production lead time is 2–4 weeks after design approval, depending on harness complexity, connector availability, and order volume. For prototype and urgent orders, we offer an expedited 5–7 business day service. We maintain safety stock of common connectors, terminals, and wire to minimize lead time for repeat orders.
Yes. We routinely provide PPAP Level 1 through Level 5 documentation for automotive OEM and Tier 1 supplier programs. This includes control plans, PFMEA, measurement system analysis (MSA), process capability studies, and full dimensional/electrical inspection reports. Our quality system is aligned with IATF 16949 requirements.
Absolutely. We regularly integrate fuse holders, relays, switches, sensors, grommets, mounting brackets, PCBs, resistors, diodes, and junction blocks directly into wire harness assemblies. This sub-assembly integration reduces your final assembly time and eliminates potential wiring errors in your production line.
All crimped terminations are made with calibrated pneumatic or servo-driven crimp tools with real-time crimp force monitoring (CFM). We validate every crimp setup with cross-section analysis (micro-section) per IPC/WHMA-A-620 criteria. Pull-test sampling per IPC/WHMA-A-620 Table 6-1 ensures mechanical retention meets or exceeds minimum requirements for each wire size and terminal combination.
We maintain full revision control for every harness design. Engineering Change Orders (ECOs) are managed through our MRP system with full traceability. When you issue a design change, we update the assembly board, work instructions, test program, and BOM simultaneously. All affected components in stock are identified and dispositioned per your instructions to prevent mixing of revision levels.
Precision cable assemblies from simple power cords to complex multi-conductor shielded cables with custom connectors and overmolding.
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Learn MoreUpload your schematics, wire lists, or engineering drawings and receive a detailed DFM review and competitive quote within 24 hours. Our harness engineering team is ready to transform your interconnect requirements into production-ready assemblies.
Prototype harnesses in 5–7 days | No minimum order quantity