Overview
Commercial trucks and heavy-duty vehicles run longer duty cycles and harsher duty conditions than passenger cars, so their wiring harnesses need to combine higher current capacity with rugged, field-serviceable construction.
Design & Construction
Heavy-Gauge Power & Chassis Wiring
Heavier gauge conductors and reinforced jacketing handle sustained high-current loads across cab, chassis, and trailer circuits, standing up to the extended service life expected of commercial fleets.
SAE J-Standard Trailer & Lighting Connectors
SAE J560/J2222-style trailer connectors and sealed lighting harnesses are built for quick hook-up and field replacement, with abrasion-resistant loom protecting circuits along the frame rail.
Manufacturing Process
Built under IATF 16949 process controls with continuity, hipot, and current-load testing on every harness, supporting truck OEMs and trailer manufacturers across high-mix commercial vehicle platforms.
Typical Applications
- Cab and dashboard control wiring
- Trailer connector and lighting harnesses
- Heavy-duty chassis and body control cabling
- Auxiliary power and PTO circuit wiring
- Fleet telematics and diagnostics interconnects
Common installations include Cab and dashboard control wiring, Trailer connector and lighting harnesses, and Heavy-duty chassis and body control cabling, where vibration resistance and long-term durability under continuous thermal cycling are the primary design drivers. The same base design can also be adapted for Auxiliary power and PTO circuit wiring and Fleet telematics and diagnostics interconnects with minor changes to connector type or cable length.
Technical Specifications
Standard configurations are available with the following technical specifications; custom configurations outside these ranges can be discussed with our engineering team. Wire Gauge: AWG 18 – 4. Conductor Count: 6 – 70 circuits. Insulation: Cross-linked polyethylene, abrasion resistant. Temp Range: -40°C to +125°C. Voltage Rating: 12V / 24V systems. Trailer Interface: SAE J560 / J2222 connectors. Current Capacity: Up to 100A per circuit.
Quality & Certification
Manufactured under IATF 16949 and ISO 9001 certification, with full material lot traceability and SAE-standard connector interfaces for commercial vehicle and trailer integration.
Customization & Lead Time
Standard lead time for the Commercial Truck & Heavy-Duty Vehicle Wiring Harness is 4–6 weeks prototype, 2–3 weeks production reorder. Connector type, cable length, and conductor configuration can be customized to match your exact application, including alternative connector families, wire gauge, and shielding to match OEM or Tier 1 platform specifications. Contact our engineering team with your drawings or requirements for a project-specific quote.
Why XinHarness
Commercial truck harnesses share production lines with our broader automotive programs, giving fleet OEMs and trailer manufacturers a single certified source for cab-to-chassis wiring. See the Automotive industry page, or request a quote for your project. For related technical background, see our article on our introductory guide to automotive wiring harnesses.
Frequently Asked Questions
The Commercial Truck & Heavy-Duty Vehicle Wiring Harness is manufactured under IATF 16949 process controls, with RoHS 3 and REACH-compliant materials as standard.
Lead times vary by volume and complexity; prototype and sample builds typically ship faster than production runs. Contact us with your specifications for a project-specific quote and schedule.
Yes, we support everything from low-volume prototype builds through high-volume production for automotive OEM and Tier 1 programs.
