Heavy Vehicle Auto Electrical Services Across Maitland

Mobile repairs, diagnostics, and electrical servicing for trucks, utes & equipment

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Core Auto Electrical

At East Coast Diesel & Electrical, core auto electrical services are the backbone of what we do. Whether you’re operating a fleet of trucks, an earthmover, or a heavy-duty ute, your vehicle’s electrical systems need to function reliably under pressure. We handle full wiring replacements, switch repairs, sensor troubleshooting, and custom electrical setups for heavy vehicles. Our team can install, upgrade, or repair lighting, gauges, relays, connectors, and harnesses. We also work with aftermarket electrical accessories, ensuring they integrate safely and efficiently. Based in Maitland, we understand the demands local industries place on vehicles over 3 tonnes and offer tailored, on-site services that minimise downtime. All work is completed using durable, commercial-grade components with workmanship guaranteed. Whether it’s a one-off repair or ongoing fleet support, we provide dependable solutions that keep your vehicle operating at peak performance.

Diagnostics & Systems

Modern heavy vehicles rely on complex electrical and computer-based systems. When something goes wrong, fast and accurate diagnostics are essential. Our team uses advanced scan tools compatible with most diesel truck makes and models to identify error codes, interpret system faults, and track down issues in your engine control unit (ECU), transmission, ABS, SRS (airbag), and more. We provide complete system diagnostics for fault scanning, module programming, and electronic system resets. If a warning light comes on or performance drops off suddenly, we’ll locate the root cause on-site and advise on the most cost-effective repair. As mobile auto electricians servicing Maitland and surrounds, we bring dealership-level diagnostic capability to your site, helping avoid the need for tows or workshop delays. We work with fleet operators, agricultural businesses, and civil contractors to ensure every system is running optimally.

Starting, Charging & Battery Systems

If your vehicle won’t start or seems slow to crank, it’s often a sign of issues within the starting and charging system. We specialise in diagnosing and repairing battery, alternator, and starter motor problems for trucks, machinery, and other diesel vehicles. Our mobile team offers battery testing, load checks, charging system evaluations, and voltage drop tests. If a battery is flat, sulfated, or no longer holding charge, we’ll recommend and install a heavy-duty replacement suited to your application. Alternator issues — including worn bearings, voltage spikes, or regulator faults — can cause ongoing electrical problems and vehicle shutdowns. Starter motors, especially on older or high-mileage engines, may develop solenoid faults or wear over time. We carry and source high-quality parts, offering both replacements and servicing to restore full electrical function. Keep your equipment working in the field with reliable starting and charging solutions.

Diesel Engine Electrical Services

Diesel engines come with unique electrical challenges, especially when it comes to fuel injection systems, glow plugs, intake sensors, and turbo controls. Our team works across diesel-powered trucks and machinery to handle engine bay diagnostics, injector wiring issues, sensor failures, and ECU programming. We also provide intake system servicing and diesel-specific fault scanning. Problems like loss of power, rough idle, or poor fuel economy may point to deeper electrical faults within the injection or intake system. We offer on-site repairs, fuel rail diagnostics, and integration checks with throttle and air intake components. Our diesel experience means we understand the interplay between mechanical systems and electronic management, delivering repairs that restore both performance and efficiency. Whether you manage a transport fleet or rely on diesel machinery in the field, East Coast Diesel & Electrical provides expert diesel electrical services backed by experience.

Air Conditioning Systems

Air conditioning faults in heavy vehicles are not just uncomfortable—they can become safety issues for operators in demanding environments. We diagnose and repair electrical faults in A/C systems, including compressor relays, blower fans, pressure sensors, and control panels. Our services cover regassing, fault scanning, actuator and sensor testing, and replacement of faulty HVAC components. Whether your air con is blowing warm air, only working intermittently, or showing signs of electrical fault, our team can get it back to full function. We work with trucks, tractors, excavators, and earthmoving machinery across Maitland and Cessnock. All A/C servicing includes leak detection and performance testing to ensure long-term results. We understand how important reliable climate control is for driver comfort and equipment longevity—and we deliver efficient solutions that keep you cool under pressure.

Emergency / Roadside Repairs

Breakdowns rarely happen at a convenient time. That’s why East Coast Diesel & Electrical offers fast-response mobile roadside services across Maitland, Rutherford, Cessnock, Kurri Kurri, and beyond. If your vehicle won’t start, is experiencing electrical failure, or has lost power mid-operation, we can be on-site quickly to get you moving again. We’re equipped to diagnose urgent faults on the spot—whether it’s a battery failure, alternator issue, blown fuse, faulty wiring, or other system fault. Our goal is to reduce your downtime and avoid unnecessary towing costs. For transport operators, tradies, and civil contractors, that means getting back to work faster and keeping to schedule. We work weekdays, after hours, and weekends (by appointment) and prioritise emergency jobs as they come in. If you’re stuck roadside or on a job site, call us for fast and reliable auto electrical support.

Car Air Conditioning Systems

Car air conditioning (A/C) systems are designed to keep your vehicle cool and comfortable by circulating chilled air inside the cabin. The system works by compressing and expanding refrigerant gas, which absorbs heat from the cabin and releases it outside. Key components include the compressor, condenser, evaporator, expansion valve, and refrigerant. Together, they regulate temperature, humidity, and airflow to provide relief during hot weather and to help demist windows in cooler months.

Like any mechanical system, car air conditioning requires regular maintenance to run efficiently. Common issues include low refrigerant levels caused by leaks, worn-out seals, or damaged hoses. A failing compressor may also cause the system to stop cooling effectively. Blocked or dirty cabin air filters can restrict airflow, while electrical faults, such as a broken relay or sensor, may prevent the A/C from turning on. Over time, mould and bacteria can also build up in the evaporator, causing unpleasant odours.

Plant Air Conditioning Maintenance

Plant air conditioning systems are essential in industrial and commercial facilities where machinery, processes, or sensitive environments require strict temperature and humidity control. Unlike car A/C, plant systems are typically larger and more complex, designed to handle continuous operation in demanding conditions. They help protect equipment from overheating, maintain safe working environments, and ensure product quality in industries such as manufacturing, food processing, data centres, and laboratories.

Regular plant air conditioning maintenance is critical to prevent breakdowns and costly downtime. Common tasks include checking refrigerant levels, cleaning or replacing air filters, inspecting and lubricating motors, and ensuring belts and fans are in good condition. Condensers and evaporators may accumulate dust, oil, or debris, reducing efficiency and increasing energy costs, so thorough cleaning is often required. Electrical components, sensors, and control panels must also be tested to confirm they are functioning correctly.