Not a hobby wiring shop
Harness Logic is a Melbourne-based precision electrical engineering and custom wiring harness fabrication business. We exist for the projects that need serious engineering discipline applied at small and custom volumes — EV conversions, prototype electronics, and specialist vehicle systems that larger manufacturers won't take on.
Engineering rigour, applied where volume manufacturers won't go
Small and custom jobs are often treated as an afterthought by manufacturers built for scale. We take the opposite approach: the same design discipline, testing standards, and documentation you'd expect from a high-volume production line, applied to one-off builds, prototypes, and low-volume runs. That's underpinned by real project history across mining equipment, heavy electric vehicles, and specialist control systems — not just enthusiasm for wiring.
Our process
Consultation & requirements
Understand the application, electrical requirements, and constraints before any design work starts.
Design & schematics
Circuit design, schematic capture, and documentation suited to the intended build volume.
Prototyping
Build and validate a prototype harness or assembly before committing to a production approach.
Fabrication & testing
In-house fabrication, verified with insulation resistance and HiPot testing where the application demands it.
Delivery & support
Delivery with documentation, plus ongoing engineering support as your project evolves.
Selected work
Project details are anonymised to respect client confidentiality.
Underground mining EVs
HV harness design and fabrication for underground electric vehicles, delivered for a leading mining equipment manufacturer.
Heavy electric trucks
HV harness design and build for heavy electric truck platforms, engineered to withstand demanding commercial-vehicle duty cycles.
Vehicle software integration
A vehicle software integration project delivered alongside a specialist control systems engineering firm.