Truck and Fleet Electrics in Picton and the Port of Bunbury

This guide is for owner-drivers, transport operators and fleet managers whose trucks, vans and utes work around the Picton industrial area and the Port of Bunbury. It explains how the local freight pattern wears electrical systems, what to check on 24V trucks and trailers, how heavy vehicles are regulated in WA, and how to plan electrical maintenance so trucks stay on the road.

How can we help?

Need it fixed?

Get a quote from a local Truck and Fleet Electrics in Picton and the Port of Bunbury auto electrician, for anything from a flat battery to a full fit-out.

Get a quote

Buying parts?

Quality auto electrical parts from Ozautoelectrics, an established Australian supplier since 2010, dispatched through a nationwide network. For retail and trade buyers.

Shop parts

Doing it yourself?

Free step-by-step guides written for Western Australia conditions, with the parts you’ll need listed for each job.

Browse DIY guides

Auto electrician in Truck and Fleet Electrics in Picton and the Port of Bunbury?

Are you an auto electrical business? List your business on this site.

List your business on this site

How freight moves around Picton

The Port of Bunbury sits on Koombana Bay with an inner harbour at Vittoria. Southern Ports lists alumina, grain, spodumene, woodchips, mineral and silica sands, caustic soda, fertiliser and fuel among the cargo it handles, and describes Bunbury as the world's largest lithium export port. Most of that freight arrives or leaves by road or rail.

Willinge Drive, built as the Bunbury Port Access Road, links the port to the South Western Highway and the Picton industrial area. Since the Wilman Wadandi Highway was completed in December 2024, it also connects to a 27 km dual carriageway that runs around the city's eastern side from Forrest Highway to Bussell Highway. Main Roads says the route is meant to give freight, tourists and locals a safer, more efficient way around Bunbury. For trucks, that means more kilometres at steady highway speed and fewer stop-start runs through suburban streets.

The port duty cycle

Port work is hard on electrical systems in its own way. A truck may do several short runs a day between a Picton yard, a processing site and the port, with long idling in queues, at weighbridges and at gates. Starter motors are used more often, and alternators spend a lot of time at idle, where their output is lowest. Lights, beacons, radios and cab air conditioning are all drawing power at the same time.

The usual result is batteries that never get fully charged. They sulphate, lose capacity and fail early, often in pairs. When a truck needs new batteries every year, the battery brand is rarely the real problem. Look at the charging system, the cable connections and how the truck is being used.

24V charging and starting

Most heavy trucks run 24V systems built from two 12V batteries in series. If one battery weakens, the other is overworked and soon follows. Test both batteries separately as well as together, and replace them as a matched pair. Check the alternator's output at idle and at working revs, and measure voltage drop across the main positive and earth cables while cranking.

Loose or corroded main cables cause a surprising number of no-starts and charging faults. In Picton the culprit is usually dust and vibration, but trucks that work the port also pick up salt from the bay. Our guide on how to know if your alternator needs replacing lists the warning signs. Many of them apply to 24V systems as well as cars.

Lights, plugs and suzi cables

Lighting faults are the most common electrical defect on trucks and trailers, and they're the easiest to spot at a roadside check. Most start at the connection between prime mover and trailer. Coiled suzi cables flex with every turn, plugs collect grit and water, and pins wear loose. A poor earth through the coupling can make trailer lights glow dimly, flicker or switch on together.

Build these checks into the daily walk-around:

• Every light working on prime mover and trailer, including side markers, brake lights and indicators.
• Plugs clean, capped when uncoupled and firmly seated when connected.
• Suzi cables free of splits and kinks, and supported so they don't drag or catch.
• No chafed wiring where looms pass the chassis, the fifth wheel or the tipper body.
• Trailer ABS and electric brake connections showing no warnings on the dash.

How heavy vehicles are checked in WA

WA manages heavy vehicles differently from the eastern States. The State's transport department notes on its heavy vehicle safety page that the National Heavy Vehicle Regulator is not a one-stop shop in WA. Main Roads WA and the transport department manage heavy vehicles here, with Main Roads handling road access, permits for restricted access vehicles, accreditation and compliance.

Roadside checks are carried out by Main Roads' compliance officers and WA Police. A vehicle found not roadworthy can be issued a defect notice and must then be inspected at an authorised inspection station or a departmental vehicle examination centre. A dead brake light or a missing indicator is enough to cause trouble, so lighting checks pay for themselves. These arrangements can change, so check the current information from Main Roads and the transport department.

Vans, utes and yard plant

Not every fleet in Picton runs prime movers. Trade suppliers, service businesses and fabrication shops run vans, utes and small rigid trucks, plus forklifts and telehandlers in the yard. Vans suffer broken reverse and number plate lights from tight loading docks. Utes carry work lights, beacons and inverters that are often wired in a hurry. Forklifts need working alarms, horns and lights for site safety.

Chafed or overloaded accessory wiring is a fire risk as well as a nuisance. If you notice a hot smell, melted insulation or a fuse that keeps blowing, stop using the circuit and have it checked. Our guide on a burning smell or smoke from car wiring explains what to do.

Planning electrical maintenance

Most fleet breakdowns that start with electrics give some warning first. A simple plan catches them early. Test batteries and charging at every scheduled service, and before winter. Keep a log of battery and alternator replacements by vehicle, so repeat failures stand out. Stock a small kit in each cab with spare globes, fuses and a suzi cable. When a fault does appear, record when and how it happens before the truck goes in.

If you're looking for help with trucks and plant, our Picton page lists the common local jobs and auto electricians who cover the area. Many offer on-site service in yards, which saves taking a truck off the road for a simple fix.

Parts for this job

Order quality parts online from Ozautoelectrics, dispatched Australia-wide.

Get it done: get a quoteDo it yourself: shop suzi cables

Get it done: get a quoteDo it yourself: shop 24V alternators

Get it done: get a quoteDo it yourself: shop 24V LED tail lights

Questions Bunbury drivers ask

Why do both of my truck batteries fail at the same time?

In a 24V system the two batteries work as a pair. When one weakens, the other carries more of the load and fails soon after. Short runs and long idling also keep both partly charged. Test each battery on its own, check the alternator and cables, and replace batteries as a matched pair.

What happens if my truck gets a defect notice in WA?

The notice will set out the problem and what you need to do. Generally the defect must be fixed and the vehicle inspected at an authorised inspection station or a transport department vehicle examination centre. Requirements can vary with the type of notice, so read it carefully and check the current rules with the department.

Has the Wilman Wadandi Highway changed truck routes around Bunbury?

It has given trucks a 27 km dual carriageway around the eastern side of Bunbury, between Forrest Highway and Bussell Highway, with connections to the South Western Highway and Willinge Drive. Main Roads describes it as a safer, more efficient route for freight. Check Main Roads for any current works or restrictions.

How often should fleet vehicles have their electrics checked?

At every scheduled service is a good rule, with an extra battery and charging test before winter. Drivers should also check lights daily during their walk-around. Vehicles with heavy accessory loads, such as tail lifts, fridges or lots of lighting, benefit from more frequent checks of batteries and cable connections.

Need an auto electrician in Bunbury?

Find local auto electricians and mobile services in the Bunbury directory, or start with your area: Bunbury.

Run an auto electrical business in Truck and Fleet Electrics in Picton and the Port of Bunbury?

• New to Ozautoelectrics? Apply for trade pricing on quality auto electrical parts.
• Already a trade customer? Log in and order parts at your trade price.
• Want more local customers? List your business on this site so drivers in Truck and Fleet Electrics in Picton and the Port of Bunbury can find you.

Not confident doing this yourself?

There’s no shame in handing it over. A local auto electrician can diagnose the fault properly and get it done safely, especially for anything involving brakes, airbags, hybrid systems or air-con gas.

Get a quote from a local auto electrician Or shop the parts and do it yourself