Starting, Charging & Battery System Experts for Trucks, Machinery & Heavy Vehicles
Mobile On-Site Diagnosis and Repair for Heavy Vehicle Starting & Charging Systems
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Minimize Downtime: Expert Mobile Repairs for Your Truck and Machinery Electrical Systems
When your truck, excavator, or agricultural machine won’t start, time is money lost.
East Coast Diesel & Auto Electrical delivers fast, mobile heavy vehicle auto electrical services in Maitland and the Hunter region — specialising in starting, charging, and battery system diagnostics and repairs.
Our qualified mobile auto electricians are equipped with dealer-level diagnostic tools and years of hands-on experience in heavy diesel platforms.
From a simple flat battery to complex alternator faults or ECU communication errors, we locate the root cause, fix it on-site, and get your vehicle back to work fast.
Request a Call-Back or call our team now for urgent service across Maitland, Rutherford, Cessnock, Kurri Kurri, and surrounding areas.
Every diesel engine depends on three core systems — battery, alternator, and starter motor — to start, charge, and operate reliably. A weakness in any of these areas can cause delayed starts, flickering lights, dash warnings, or full electrical shutdowns.
Modern heavy vehicles rely on computer-controlled networks that monitor voltage, temperature, and load balance across the system. That means a minor battery issue can cascade into injector faults or ECU communication errors if ignored.
At East Coast Diesel, we provide comprehensive electrical inspections, testing, and repairs to prevent downtime and maintain peak performance — whether you run a single truck or a 20-vehicle civil fleet.
Batteries: The Foundation of Reliable Power
A healthy battery ensures consistent starts, stable voltage, and proper power delivery to your vehicle’s electronic systems. Extreme heat, vibration, and long idle times — common across Hunter Valley job sites — can shorten a battery’s lifespan dramatically.
Our technicians perform voltage drop tests, load testing, and charging system evaluations to determine the exact condition of your battery. We test cold cranking amps (CCA), inspect terminals for corrosion, and check alternator output to ensure proper recharging.
If replacement is needed, we source and install heavy-duty commercial batteries from trusted brands matched to your vehicle’s specific power requirements — including deep-cycle, AGM, and maintenance-free designs ideal for construction and agricultural machinery.
We also offer:
Battery isolation switch installation for plant and mine vehicles
Dual-battery systems for accessories and backup power
Preventative maintenance scheduling for fleet battery checks
A well-maintained battery reduces stress on your alternator and starter, extending the overall life of your electrical system.
Alternators: Sustaining Energy on the Job
Your alternator is the workhorse of your charging system, converting engine power into usable electricity to recharge the battery and run critical components.
When alternators fail, you may notice dimming lights, warning indicators, unstable voltage, or battery drain. Ignoring these early signs can lead to complete system failure and unexpected roadside breakdowns.
East Coast Diesel’s technicians use advanced multimeters and oscilloscope testing to check ripple voltage, regulator performance, diode integrity, and bearing wear. We can repair or replace alternators on-site for most truck and heavy-equipment models, ensuring you maintain reliable charging while on the job.
We also:
Rebuild and replace alternator assemblies for diesel engines
Diagnose voltage spikes and over-charging issues
Test wiring integrity and ground faults
Fit upgraded high-output alternators for heavy load applications
Each alternator repair includes a complete charging system check to verify consistent power delivery throughout the vehicle.
A sluggish crank or click-and-no-start scenario usually traces back to a failing starter motor, worn solenoid contacts, or poor earth connections. In heavy diesel engines, the starter endures extreme torque demands — making wear inevitable over time.
We provide comprehensive starter motor diagnostics, bench testing, and replacement services. Using manufacturer-spec diagnostic data, we check solenoid draw, pinion engagement, and internal brush condition to confirm whether repair or replacement is the best value option.
Our mobile units carry a range of common starter motors and solenoid kits for trucks, excavators, loaders, and tractors, allowing most repairs to be completed on-site the same day.
Diesel engines feature complex electrical systems distinct from petrol vehicles. Our technicians are trained to handle diesel-specific electrical issues that often overlap with fuel delivery and engine management systems.
Common components we test and repair include:
Glow plug circuits and timers — ensuring proper cold starts in winter conditions
Fuel injection system wiring — diagnosing voltage drops and sensor faults
Turbo actuator and boost pressure sensors — verifying accurate control signals
EGR valves and temperature sensors — resolving performance or emissions faults
Throttle position and crank sensors — checking for irregular readings that cause misfires or limp mode
We combine mechanical knowledge with advanced electrical insight to ensure diesel vehicles run cleanly, efficiently, and reliably.
Dealer-Level Diagnostics & System Resets
Today’s trucks and heavy machinery use multiple ECUs communicating across CAN-Bus networks. Faults in these systems require more than a basic code reader.
East Coast Diesel utilises dealership-grade diagnostic tools capable of interfacing with most major manufacturers — including Hino, Isuzu, Volvo, Scania, Komatsu, and Caterpillar. Our diagnostic process includes:
Full system scan for engine, transmission, ABS, SRS, and BCM fault codes
Live-data monitoring to pinpoint voltage irregularities and sensor malfunctions
Module resets and reprogramming after part replacement
Electrical continuity testing and harness tracing
This level of diagnostic precision saves hours of trial-and-error, identifies root causes faster, and helps prevent costly repeat faults.
The Mobile Advantage: On-Site Service That Minimises Downtime
Our fully equipped mobile service vans operate across Maitland, Rutherford, Kurri Kurri, Cessnock, and the Central Coast, bringing the workshop to your site.
This streamlined process allows our clients to reduce downtime by up to 70 percent compared with workshop-based repairs.
Here’s how it works:
Tell us what's wrong
Call or submit a short form describing the symptoms — non-start, flat battery, or warning light.
We dispatch a technician
Your job is prioritised based on urgency, and our mobile auto electrician heads directly to your site.
On-site diagnosis
We perform complete system testing with scan tools, multimeters, and load testers.
Repairs completed immediately
Using premium-grade components, we fix or replace the faulty part on the spot whenever possible.
You’re back on the road
Once tested and verified, your vehicle returns to full operation without the cost and delay of towing.
Fleet & Machinery Coverage Across Maitland & the Hunter Region
East Coast Diesel provides comprehensive electrical servicing for all heavy vehicles and diesel equipment, including:
Prime movers, rigid trucks, and delivery fleets
Excavators, loaders, and earthmoving machinery
Agricultural tractors and implements
Mining and civil construction vehicles
Buses, service utes, and trailers
We understand the pressure on fleet managers and owner-operators to keep assets operational. That’s why we maintain flexible scheduling, after-hours availability for urgent repairs, and full reporting for fleet maintenance records.
Whether you operate in Rutherford’s industrial zones, vineyards near Cessnock, or farm properties across Lochinvar and Kurri Kurri, we provide a trusted mobile service that keeps your equipment working.
Serving Commmunities across Central Coast NSW
Why Fleet Managers Trust East Coast Diesel
When choosing an auto electrical partner, reliability and technical depth matter most.
Here’s why our clients keep coming back:
Heavy-vehicle specialists – Certified in heavy commercial vehicle mechanical and automotive electrical technology.
Fully mobile service – On-site repairs reduce downtime and eliminate towing costs.
Advanced diagnostics – Dealer-level scan tools capable of diagnosing engine, transmission, ABS, and A/C faults.
Local knowledge – Based in Maitland, we know the terrain, industries, and conditions your fleet faces.
Transparent service – Honest communication, clear explanations, and upfront cost estimates.
End-to-end capability – From wiring looms to alternators, A/C systems, and complex ECU repairs.
Our customers appreciate our hard-working, no-nonsense approach, delivering dealership-quality expertise without inflated costs.
Preventative Maintenance & Electrical Health Checks
Preventing a breakdown is always cheaper than recovering from one. We provide ongoing preventative electrical maintenance tailored to fleet operations, including:
Battery load testing and alternator performance checks at scheduled intervals
Inspection of earth straps, connectors, and corrosion points
Software updates and ECU resets during maintenance cycles
Logging voltage and temperature readings for predictive failure detection
These checks help extend component life, improve reliability, and maintain compliance with workplace safety standards. Ask about integrating our electrical inspections into your regular fleet servicing program.
Frequently Asked Questions
We often get asked a few common questions about heavy vehicle electrical systems.
Can you diagnose engine and electrical warning lights on heavy trucks?
Yes. Our diagnostic tools read and interpret manufacturer-specific fault codes across all major truck and machinery brands. We identify the fault, test the circuit, and clear the code once repaired.
Do you offer emergency roadside assistance for electrical faults?
Yes. We provide rapid mobile callouts throughout Maitland, Rutherford, Kurri Kurri, and the surrounding Hunter region for urgent electrical and starting issues.
Are your repairs guaranteed?
Absolutely. All workmanship performed by East Coast Diesel & Auto Electrical is backed by a guarantee for quality and reliability of repair.
What types of heavy vehicles do you service?
We service a wide range of heavy vehicles, including trucks, machinery, earthmovers, heavy-duty utes, and other diesel vehicles, ensuring we cover the needs of civil contractors, transport companies, and agricultural businesses in the Maitland region.
Can you replace custom electrical setups or aftermarket accessories?
Yes, our team can install, upgrade, or repair custom electrical setups and also work with aftermarket electrical accessories, ensuring they integrate safely and efficiently within your heavy vehicle’s system.
Which areas do you service?
Our mobile units cover Maitland, East Maitland, Rutherford, Thornton, Cessnock, Kurri Kurri, Gillieston Heights, and the wider Central Coast region.
Can you work on site at mines or construction projects?
Yes. We comply with site safety requirements and are experienced in servicing vehicles operating under civil and mining conditions.
Do you replace batteries for large machinery on-site?
We carry a range of heavy-duty batteries suitable for trucks and plant equipment, allowing us to replace failed units immediately without towing.
Get Back to Work — Fast, Reliable Mobile Auto Electrical in Maitland
East Coast Diesel & Auto Electrical is ready to respond when your vehicle won’t start or keeps triggering fault codes. With 15 years of hands-on heavy-vehicle experience, industry-certified qualifications, and genuine pride in honest work, we’re the local specialists trusted by transport operators and machinery owners across the Hunter region.
Call us today or book a service online to get your heavy vehicle back up and running with minimal downtime.
