Truck Jump Start Melbourne & Geelong
0414 955 695
What We Do
We run a mobile heavy vehicle jump start service built for trucks, not cars. Our vans carry high-output 12V and 24V start equipment plus replacement batteries from Exide, Bosch and SuperCharge. If a jump start won’t get you through the day, we can fit a replacement on the same call.
We handle prime movers on the Hume Freeway, rigids stuck at a customer’s loading dock in Truganina, and buses that won’t fire in a Corio depot at 4am. Every call-out ends with a load test and an alternator check, because a jump start only tells you the truck started. It doesn’t tell you why it went flat.
Correct voltage every time, from 12V parallel banks to 24V series-parallel quad setups.
Commercial start units sized for 13 to 16-litre engines, not car-grade jump packs.
Battery load test and charging system check before we leave the job.
Nights, weekends and public holidays across metro Melbourne, Geelong and the corridor between.
- Book an Appointment
How it works
Why Won't a Car Jump Pack Start a Prime Mover?
Give us your location, make and model, and what happens when you turn the key. Clicking, slow cranking and total silence each point to different faults.
A technician attends with 12V and 24V start equipment and replacement batteries on board. No tow truck, no workshop drop-off.
We confirm system voltage, check the battery isolator and inspect for swollen or leaking batteries before any leads go on.
Once the engine is running, we load test the batteries and check alternator output. You get a straight answer on what failed and what it needs.
Truck Won't Start? Get It Running and Find Out Why
Book an Appointment
Common Questions
Frequently Ask Questions
Is my truck 12V or 24V, and why does it matter?
Most Volvo, Scania, Mercedes-Benz, Isuzu F Series and Hino 500 trucks run 24V, using two or four 12V batteries in series or series-parallel. Many Kenworth and Mack models run 12V banks with three or four batteries in parallel. Getting it wrong is costly. Feeding 24V into a 12V system can destroy ECUs, clusters and telematics units in seconds, so we confirm voltage on site before connecting anything.
Why won't a car jump pack start a prime mover?
A heavy diesel can draw several hundred to over a thousand amps while cranking, depending on engine size, oil temperature and starter condition. Consumer packs and thin car leads can’t hold that load. Voltage sags, the starter clicks or turns slowly, and the ECU can drop out mid-crank.
How do you jump start a 24V truck safely?
On a series pair, the connection goes across the full 24V circuit: the main positive feeding the starter and the chassis-earthed negative. Clamping onto the link between batteries only feeds half the bank. We switch off all loads, including fridges and inverters, and connect positive first, then negative to a clean chassis earth. We then crank in short bursts to protect the starter.
What voltage should a truck battery read?
At rest, a fully charged 12V battery reads 12.6V to 12.7V, and a 24V system reads 25.2V to 25.4V. Below 12.0V per battery means deep discharge. With the engine running, expect roughly 13.8V to 14.7V on 12V systems and 27.6V to 28.8V on 24V, depending on the manufacturer. Resting voltage isn’t a health check, which is why we load test as well.
Why do trucks go flat in Melbourne and Geelong?
Summer heat speeds up plate corrosion and water loss, and the damage usually shows up on the first cold winter morning, when thick oil and reduced battery output meet. Other common causes include parasitic draw from telematics and fridges, short-run delivery work, corroded terminals, and new batteries paired with old ones in the same bank. A switched-off or tripped battery isolator also catches plenty of drivers out.
Will the alternator recharge a flat battery after a jump start?
Not properly. An alternator is designed to maintain a charged battery, not recover a deeply discharged one. Running it flat out to catch up adds heat and wear, and the battery may never regain full capacity. If testing shows the batteries are recoverable, we’ll recommend a proper charge. If they fail, we can fit matched replacements on the spot.
Which areas of Melbourne and Geelong do you cover?
In Melbourne we cover Dandenong, Truganina, Derrimut, Laverton North, Altona, Brooklyn, Port Melbourne, Tullamarine, Somerton, Campbellfield and Epping. In Geelong we cover Corio, North Geelong, Norlane, Lara, Moolap and Waurn Ponds. We also cover the main freeways and ring roads linking them. Outside those areas? Call anyway and we’ll give you a realistic ETA.
Can you jump start buses, forklifts and plant at a depot or worksite?
Yes. We attend bus yards, warehouses, freight terminals and construction sites for coaches, forklifts, excavators, loaders and other 12V or 24V plant. If several vehicles in a fleet go flat at once, we look for a common cause such as parasitic draw, isolator practice or batteries at end of life.