Our team designs and manufactures high-quality, custom wiring harnesses built to withstand harsh mining and civil conditions. Whether upgrading existing systems, integrating aftermarket accessories, or replacing damaged OEM harnesses, we deliver robust, purpose-built solutions that ensure reliability, ease of installation, and long service life.

Safety is critical and we ensure equipment meets all compliance requirements. We install, maintain, and calibrate mine-spec systems including GPS, fleet management hardware, proximity detection, collision-avoidance, and fatigue-monitoring systems. Our expertise ensures accurate integration, dependable functionality, and full site compliance.

​As an ARC-authorised business, we provide complete automotive and heavy-vehicle air-conditioning services. This includes diagnostics, leak detection, component replacement, regassing, and system performance optimisation. All work is carried out in compliance with environmental and regulatory standards, ensuring comfort and safety for operators.

We offer scheduled preventative maintenance programs tailored to your fleet’s needs. By identifying electrical wear, corrosion, and early-stage failures, we help avoid major breakdowns and extend equipment life. Our fleet electrical management services ensure consistent performance across all vehicles, reducing unexpected downtime and maintenance costs.

We supply a wide range of auto-electrical consumables, components, and replacement parts for light vehicles, trucks, and heavy mobile plant. This includes connectors, wiring, fuses, lighting, sensors, switches, batteries, and high-quality aftermarket or genuine OEM parts. Our inventory supports quick turnaround times and reliable repairs.

We provide comprehensive diagnostic services for all heavy mobile equipment, earthmoving machinery, trucks, and light vehicles. Using advanced tooling and industry-leading diagnostic software, we troubleshoot complex electrical faults, repair damaged wiring, restore electronic control systems, and ensure machines operate safely and efficiently in demanding environments.

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Electrical faults can cause costly downtime, and our advanced fault-finding services minimise disruption to operations. With extensive experience across multiple OEM platforms, we quickly identify underlying issues—from intermittent electrical faults to module communication failures—ensuring accurate repairs and long-term reliability.

We provide complete electrical overhauls for heavy machinery and mobile plant in your workshop. From full harness replacements and control module upgrades to lighting, switching, and monitoring system renewal, we restore equipment to optimal electrical condition. Our rebuilds improve reliability, reduce downtime, and extend machine life—ideal for ageing fleets or major shutdown projects.

McCartney Auto Electrical also designs and manufactures custom electrical control boxes to suit a wide range of underground heavy equipment applications. Our control boxes are engineered for durability, ease of access, and seamless integration with existing systems.

Each unit is built to withstand the tough conditions of underground environments while providing centralised, organised control of electrical functions. Whether for new installations or upgrades, our control boxes enhance system reliability and simplify maintenance on site.

When equipment fails, rapid response is essential. We provide reliable mobile breakdown support for both metropolitan and remote sites. Our service vehicles are fully equipped to diagnose and repair most electrical issues on the spot, helping get your machinery back to work with minimal delay.