Harntech | Engineered Wiring Harness & Auto Electrical Solutions

Engineered Wiring Harness &
Auto Electrical Solutions

From concept to production, we focus on precision engineering, consistent quality, and fast turnaround times.

With over 20 years of proven industry experience, we design and manufacture high-quality wiring harnesses and complete electrical solutions trusted by manufacturers across a wide range of industries.

By combining advanced manufacturing processes, strict quality control, and a commitment to continuous improvement, we provide durable electrical solutions with consistent performance and fast turnaround times. We strive to not just meet specifications but to exceed expectations.

Markets Served

Based in Johannesburg, South Africa, HARNTECH provide custom wiring harnesses, cable assemblies and electromechanical solutions to various markets worldwide:

Agricultural, Alternative Energy, Automotive, Commercial Trucking, Construction, Electronic Industries, Marine, Military, Mining, Off-Highway, Transportation.

Mission, Vision and Values

Mission

To deliver high-quality Wiring Harness and Turnkey Electrical Solutions with unwavering commitment to customer satisfaction, cost-effectiveness, and consistent excellence. We strive to exceed expectations through deep product knowledge, relentless innovation, and a passion for success.

Vision

To be the market leader in Electrical Interconnect Solutions by consistently setting the standard for quality, integrity, and customer focus. We envision a future where our dedication to improvement, adaptability, and leadership inspires industry-wide excellence.

Values

Quality:We believe excellence is a habit, not an act. Every product and service reflects our high standards and skilled execution.
Customer Focus:A satisfied customer is our best strategy. We listen, respond, and deliver beyond expectations.
Integrity & Responsibility:We lead by example, act with honesty, and take ownership of our actions.
Continuous Improvement:We embrace change, seek out opportunities in challenges. We will re-set, re-adjust, re-start, re-focus as many times as we need to.
People-Centered Culture:We hire character and train skill, valuing diversity, motivation, and attitude.
Leadership:True leadership is demonstrated through action, not titles. We cultivate leaders who inspire through example.
Resilience & Determination:We never decrease the goal, we always increase the effort. We don’t stop when we’re tired, we stop when we’re done.

Products & Services

OEM Replacement Wiring Harnesses
Improved Mine Spec Wiring Harnesses
Battery & Power Cables
M12 Sensor & Data Cables
Coaxial Cables Assemblies
Ruggedized Overmolded Connectors
Electrical Rebuild & Installation Kits
Braided Mine Spec Cable
Plug & Play Installation Kits
Starters, Alternators & Batteries
Service & Maintenance Kits
Connector Repair Kits
Wire, Sleeving & Harnessing Components
Tooling
LED Lighting & Installation Kits
Isolator Switches
ISO23875 Cabin Air Filtration Systems
Anti Idle HVAC Kits
Isolation & Lockout Stations
E-Stop Kits
Power Distribution Units
Ultra Class Power Distribution Units
LED Plant Number Boards
Boarding Light Kits
Electrical Battery Master Switches
Engine Control Panels
Vehicle Minebars
3D Scanning & Reverse Engineering
3D Printing
Laser Engraving Decals
CNC Turning
CNC Milling
Dash Panel & Enclosure Fabrication
HMI Safety Systems & Condition Monitoring
Auto Electrical Spare Parts
Jumpstart Connectors

Contract Wiring Harness Manufacturing

From single lead wires to complete vehicle cab harness systems, HARNTECH scales seamlessly to meet any production demand, accommodating low- to high-volume production while maintaining strict quality standards.

We manufacture wiring harnesses from customer-supplied drawings, or our experienced and dedicated engineering team can work closely with you to develop and design the most suitable harness assembly for your application.

Harness designs from industry-standard software packages can be uploaded directly into our custom-designed manufacturing system, enabling accurate generation of Bills of Materials (BOMs) and detailed manufacturing reports. This ensures every harness is built efficiently, consistently, and exactly to specification.

All wiring harnesses are manufactured under a ISO 9001 Quality Management System and in accordance with IPC/WHMA-A-620C standards.

Every assembly undergoes eTesting for continuity, short circuits, and insulation breakdown, followed by a thorough final inspection before packaging and dispatch.

We also specialise in the manufacture of Military-Grade Cables and Wiring Harnesses, electromechanical assemblies, and completed vehicle dashboards. All military assemblies are produced to customer-specific military standards, with testing conducted using internationally approved MK test procedures, ensuring performance in the most demanding environments.

Battery & Power Cables

Using high-speed, automated cut, strip, and crimp technology, HARNTECH manufactures heavy-duty battery and power cables to precise lengths and exact specifications.

Our automated processes ensure exceptional accuracy and repeatability, with the capability to process large cable sizes ranging from 16 mm to 240 mm, making us ideal for both demanding and high-volume applications.

All crimping is performed on high-specification hydraulic crimping presses, capable of producing up to 150 kN of crimp force. Crimp height, return height, and cycle speed are precisely controlled via an adjustable controller, ensuring consistent, repeatable, and reliable results.

Recognising the critical operating environments of battery and power cables, every crimp undergoes strict quality control procedures, including dual-range pull-force testing measured up to 10,000 newtons, ensuring strong, dependable, and compliant connections.

For enhanced durability and a professional finish, we offer a comprehensive range of terminal insulator boots that comply with international standards. Additional protection options include heavy-duty nylon conduit and high-performance PVC-coated yarns, providing robust protection against mechanical, thermal, and environmental factors.

Aftermarket Wiring Harnesses & Solutions

HARNTECH designs and manufactures pre-assembled wiring harness kits to reduce installation time while ensuring consistent mechanical and electrical fitment.

Many aftermarket systems require wiring harness assemblies that seamlessly interface with both OEM equipment and specialised auxiliary systems. HARNTECH has extensive experience in developing these integrated solutions, ensuring reliable performance and compatibility.

We have successfully partnered with a wide range of body builders and manufacturers, including producers of water and diesel bowsers, service trucks, and fire trucks, enabling seamless integration of aftermarket systems with OEM vehicle platforms.

To enhance safety, reliability, and uptime in off-highway and specialised vehicle markets, we manufacture a range of solutions including Isolation and Lockout Stations, Power Distribution Units, Boarding Light Controllers, and optional lighting upgrade kits—engineered for demanding operating environments.

Custom-Designed OEM Replacement Wiring Harnesses

Recognising the growing demand for high-quality, reliable, defect-free, and cost-effective OEM off-highway replacement wiring harnesses, HARNTECH offers unmatched expertise in this specialised field.

Customers sourcing replacement OEM harnesses are often faced with unavailable stock, extended lead times, discontinued part numbers, and excessive costs—all of which can result in prolonged equipment downtime. HARNTECH provides a practical and dependable alternative.

Through a meticulous reverse-engineering process, we recreate OEM wiring harnesses with precision, while identifying opportunities to enhance and improve the original design where necessary. The result is a more robust, longer-lasting harness that delivers improved performance and reliability in demanding environments.

COMPETITIVE PRICING

OEM wiring harness assemblies are notoriously expensive. By applying LEAN manufacturing principles and leveraging our extensive component and design database, HARNTECH is able to significantly reduce replacement costs.

We maintain a large inventory of raw materials covering multiple equipment manufacturers and utilise interchangeable, industry-proven components, including Deutsch connectors, automotive cross-linked wire, and PVC yarn braiding. This strategic approach allows us to offer highly competitive pricing without compromising quality.

RAPID LEAD TIMES

Extended lead times from OEM suppliers can often be avoided by working proactively with HARNTECH. By identifying and earmarking harnesses that are prone to failure—such as engine, transmission, and rear frame harnesses—we help ensure replacements are readily available before breakdowns occur.

Using applied reverse-engineering expertise, customer-supplied sample harnesses, electronic drawings and design services, automated Bill of Material generation, and detailed cost analysis, we dramatically shorten lead times. All processes are fully documented within robust systems to ensure repeatability, traceability, and reliable stock availability when needed.

DESIGN IMPROVEMENTS & ENHANCED DURABILITY

Many OEM wiring harnesses are supplied without connector backshells or protective boots, making them vulnerable to moisture, dirt ingress, and damage during pressure washing—often leading to premature failure and costly downtime.

HARNTECH enhances these designs by incorporating waterproof boots, matched backshells, and durable protective coverings engineered for harsh environments. Harnesses can be further specified with advanced protection solutions to withstand extreme heat, corrosion, abrasion, and mechanical damage.

Through careful component selection and proven design enhancements, HARNTECH has successfully extended the service life of numerous OEM replacement harnesses—delivering longer-lasting, more resilient solutions our customers can rely on.

Electrical Rebuild Kits

In today’s fast-paced manufacturing environment, many clients are aiming to reduce supplier complexity and minimise inventory holdings. As a result, there is growing demand for complete electrical rebuild kits that simplify procurement and assembly.

HARNTECH’s electrical rebuild kits are supplied as fully integrated packages, typically including wiring harness assemblies, battery cables, lighting systems, dash panels, switches, and related electrical components. Delivering all required components in a single kit helps shorten production lead times, streamline installation, and reduce the risk of assembly defects.

Electrical Connector & Repair Kits

HARNTECH’s Electrical Connector and Repair Kits are purpose-designed to equip field service and maintenance technicians with the correct components to carry out repairs quickly and effectively – helping to reduce equipment downtime.

Each kit is supplied in a heavy-duty ABS plastic organiser, complete with clearly labelled arrangement trays and visual part-number references. This ensures easy identification of components in the field and simplifies the re-ordering process.

We supply connector repair kits suitable for most OEM applications and offer full customisation options to meet specific customer, equipment, or operational requirements.

Electrical & Mechanical Spare Parts

HARNTECH offers an extensive range of electrical and mechanical spare parts to meet a wide variety of application and maintenance requirements.

Our range covers everything from commonly used, everyday components such as fuses, relays, and lighting, to more advanced spare parts including gear selectors, steering column switches, and pressure transducers.

As our HARNTECH product portfolio continues to expand, we also supply Isolation and Lockout Stations, Boarding Light Controllers, Power Distribution Units, and a variety of electrical maintenance and service kits.

In addition, we provide engine and transmission wiring harness kits, as well as original replacement spare parts for the majority of OEMs—offering reliable solutions at highly competitive pricing.

CNC Milling, Laser Cutting & Sheet Metal Fabrication

HARNTECH offers a comprehensive range of in-house manufacturing capabilities, enabling us to deliver fully integrated, high-quality solutions with reduced lead times and full control over quality and consistency.

CNC MILLING & TURNING

With advanced CNC milling capabilities, we machine a wide variety of materials including aluminium, steel, plexiglass, and engineered plastics, supporting efficient product development and precision manufacturing.

Key components such as Control Panels, Power Distribution Units, and Dash Panels are CNC-milled in-house, allowing for rapid turnaround times, design flexibility, and consistent quality.

Complementing our milling capabilities, CNC turning enables the precise machining of cylindrical and rotational components to tight tolerances.

LASER CUTTING & ENGRAVING

Our laser cutting and engraving facilities allow us to customise and manufacture dash panels, decals, serial number plates, legends, and identification plates to exact customer specifications. Supporting everything from prototype development to high-volume production, we deliver clean, accurate, and professional finishes across all applications.

IN-HOUSE SHEET METAL FABRICATION

HARNTECH’s in-house sheet metal fabrication capabilities enable the manufacture of custom enclosures, brackets, mounting plates, frames, and structural components tailored to specific electrical and mechanical requirements.

Producing sheet metal components internally allows us to maintain tight tolerances, consistent quality, and fast turnaround times, while ensuring seamless integration with our electrical and wiring solutions. We support low-volume custom builds as well as repeat production runs.

ELECTRO-MECHANICAL ASSEMBLIES

Complementing our fabrication capabilities, HARNTECH specialises in electro-mechanical assemblies, supplying fully assembled and tested units ready for installation.

These assemblies integrate wiring harnesses, electrical components, control systems, sheet metal housings, and mechanical hardware into complete, production-ready solutions. Each assembly is manufactured to specification, rigorously tested, and delivered as a ready-to-install unit, reducing on-site assembly time and improving overall system reliability.

Drawing & Design Services

HARNTECH utilises industry-standard CAD electrical and wiring harness design software to deliver comprehensive electrical system design and drafting services tailored to our clients’ requirements.

Our experienced team works closely with customers from the earliest concept stage—including circuit design and prototyping—through to final validation and volume production, ensuring efficient development and seamless transition to manufacture.

For new projects, we prepare complete design data packs, which may include electrical schematics, wiring harness drawings, detailed Bills of Materials (BOMs), installation instructions, and approval documentation, providing full traceability and consistency throughout the project lifecycle.

Our in-house drafting and engineering team also specialises in the design and development of electro-mechanical assemblies, including Isolation and Lockout Stations, Power Distribution Units, Boarding Light Kits, Emergency Stop Systems, and fully customised solutions to meet specific application needs.

3D Printing & Rapid Prototyping

In-house 3D printing supports rapid prototyping and low-volume production, enabling fast design validation and cost-effective manufacturing.

We produce prototype and production components such as enclosures, brackets, clips, cable guides, covers, and custom electrical and mechanical parts, allowing evaluation of fit, form, and function as well as direct use in finished assemblies where suitable.

This capability reduces development time, tooling costs, and lead times, while providing flexibility for custom and production components.

On-Site Consulting Services

HARNTECH provides on-site consulting services built on a thorough understanding of our customers’ operational requirements and in-depth technical evaluations. Through detailed assessments and targeted case studies, we identify the root causes of electrical system failures and develop practical, reliable solutions.

By analysing wiring harnesses and associated components that are prone to failure, we deliver well-documented root cause investigations, along with corrective and preventative recommendations designed to improve reliability and reduce downtime.

Our consulting services also include expert guidance in component selection, system design for harsh and demanding environments, reverse engineering of existing electrical systems, and the implementation of design improvements to enhance performance, durability, and service life.

Quality

Quality is embedded into every stage of our operations, from design and manufacturing through to final inspection and delivery.

Operating under a strict Quality Control Programme, aligned with ISO 9001 Quality Management System principles, we are committed to the continuous improvement of our manufacturing processes, ensuring consistent, reliable, and defect-free products.

Throughout production, IPC/WHMA-A-620 inspection points are implemented at each work cell, allowing work-in-progress to be continuously monitored and verified against international workmanship standards.

All crimping presses are equipped with Crimp Force Monitoring, and crimped connections are subjected to pull-force testing and crimp-height verification. Test data is captured electronically and maintained as part of our quality records and full traceability system.

Completed assemblies undergo a fully computerised eTesting process, verifying continuity, insulation resistance, and overall assembly integrity. All test results are securely stored on a centralised server, enabling detailed data reporting and long-term traceability.

Aerospace & Defence wiring harness testing is supported by internationally approved MK Test Systems, providing fully automated testing with secure electronic recording of all test results. Testing capabilities include automatic harness testing, automatic connector testing, and equipped assembly and functional continuity testing, ensuring compliance, reliability, and full traceability for mission-critical applications.

Final inspection checkpoints are conducted before packaging and dispatch, ensuring every product conforms fully to customer specifications and contractual requirements.

To maintain the highest standards of workmanship, in-house training programmes are customised to suit individual manufacturing cells and are based on IPC/WHMA-A-620E standards, ensuring consistent quality across all production teams.

HARNTECH operates in accordance with internationally recognised quality, automotive, environmental, and occupational health and safety standards, reinforcing our commitment to excellence, compliance, and responsible manufacturing:

ISO 9001 – Quality Management SystemsEnsuring consistent product quality, customer satisfaction, and continuous process improvement.
IATF 16949 – Automotive Quality ManagementDemonstrating compliance with stringent automotive industry requirements, with a focus on defect prevention and supply chain reliability.
ISO 14001 – Environmental Management SystemsReflecting our commitment to environmentally responsible operations, reduced environmental impact, and sustainable manufacturing practices.
ISO 45001 – Occupational Health & Safety ManagementEnsuring a safe, healthy workplace through proactive risk management and continuous improvement in occupational health and safety performance.

These accreditations confirm HARNTECH’s capability to deliver high-quality, compliant, and reliable electrical and electromechanical solutions across industrial, off-highway, automotive, and defence sectors.

Capability

Operating from a state-of-the-art 35,000-square-foot manufacturing facility, with the flexibility to support small, medium, and large production runs, we adapt quickly to changing customer requirements.

By investing in the latest wire-processing technology and software, supported by a strong management team and strategic partnerships with world-class equipment suppliers, we consistently deliver quality products that meet exacting specifications.

We offer a comprehensive range of assembly components and manufacturing capabilities, including:

High Speed Automated Wire Processing up to 25mm
High Speed Automated Battery and Power Cables up to 240mm
In-line Wire Marking Non-contact inkjet, hot stamp, laser marking and heat shrinkable tubes
Processing of PVC, All Automotive Cross Linked wires and Milspec wire
Wire Twisting up to 2.5mm and lengths to 5'000mm
Automatic and Semi-Automatic Terminal Crimping
Hydraulic Crimping up to 150kN
Ultrasonic wire splicing with dual wall adhesive covering up to 35mm
Heat Shrink and Ribbon Cable Processing
High performance PVC braided nylon coated yarns for harness covering that are temperature, chemical and abrasion resistant, slit and non-slit convoluted tubing, military spec DR heat shrink tubing and flexible, expandable, braided sleeving
Harness Braiding 24 and 32 Carriers
Build boards with scaled drawings, specifying all relevant manufacturing guidelines
Electromechanical Design, Electrical System and Wiring Harness Drawing and Design Services on International Recognised Software Applications
Rapid Prototyping
Overmoulding of Connectors and Electronics for Robustness and Improved IP Ratings
Electrical Kitting for Production Lines
Laser Engraving of Instrument Panel Films and various Identification Decals
Connector supply of major brands such as Deutsch, Tyco, ITT Cannon and Amphenol
Electrical Spare Parts
Electrical Connector and Repair Kits
CNC Milling and Turning Services
Reverse engineering of OEM wiring harnesses to specifications or customer required improvements
eTESTING is carried out by industry leading testing equipment, producing PASSED reports and labels

MILITARY GRADE HARNESS TESTING CAPABILITY including automatic recording of test results:

AUTOMATIC HARNESS TESTING

AUTOMATIC CONNECTOR TESTING

EQUIPPED ASSEMBLY & FUNCTION TESTING

FABRICATION

Connect With Us

T +27 11 894 3339 | C +27 79 921 0771