7 October 2018

Do you know how to jump start your car?

Updated 6 October 2026.

A flat battery is inconvenient, but a jump start is not suitable for every vehicle or situation. Incorrect connections can cause injury or damage electronics. The safe procedure is the one specified for your vehicle and the equipment you are using.

Check the location and battery first

If the car is in a dangerous position, prioritise getting help rather than working beside moving traffic. Do not attempt a jump start if the battery is visibly damaged, cracked or leaking. Keep flames and sparks away, and contact roadside assistance if you are uncertain about the battery's condition.

A car that will not start does not necessarily have a flat battery. A technician can check the battery and charging system rather than relying on repeated starting attempts.

Read the instructions for both vehicles

Consult the owner's manual before connecting anything. If another vehicle will supply power, check its manual too: some vehicles must not be used to jump-start another car. For a jump pack, follow both the vehicle instructions and the pack manufacturer's directions.

  • Confirm that jump-starting is permitted and that the equipment has the correct voltage and capacity.
  • Identify the approved jump terminals and earth point. They may differ from the battery terminals or be located away from the battery.
  • Follow the specified preparation, connection, starting and disconnection sequence exactly.
  • Keep leads clear of moving parts, and never allow the clamps to touch each other.

There is no universal instruction to connect both black clamps directly to battery-negative terminals. Use the connection points specified by the manufacturer. If the instructions are missing or unclear, stop and ask a roadside technician.

Extra care with hybrids and electric vehicles

Do not confuse a vehicle's low-voltage auxiliary battery with its high-voltage traction battery. Never connect jump leads to high-voltage components or orange high-voltage cables.

Some hybrids and electric vehicles have a manufacturer-approved low-voltage recovery procedure, while their use as a donor vehicle may be restricted. Check the exact model's manual; the procedure for a conventional petrol car is not a substitute.

After the car starts

A successful start does not establish that the battery is healthy or fully charged. Driving for a fixed period, such as 30 minutes, cannot guarantee a full recharge. Ask for advice on testing and charging the battery and investigating why it went flat.

For further guidance, see NRMA's flat-battery advice and RAC's explanation of recharging a flat battery. For the actual procedure, always use the manufacturer's instructions for your vehicle.

You may find these interesting

What To Do If Someone Hits Your Parked Car

Coming back to find your parked car damaged is never fun, but knowing how to respond correctly can save you time, money and stress.

Firstly, understand that getting upset is natural, but taking a deep breath will help you make better decisions. Examine your car thoroughly and document any visible damage, taking multiple photos from different angles, including close-ups of dents, scratches or broken parts, and capturing the surrounding area, such as road signs and markings, for context.

Next, see if you can locate the driver responsible. Sometimes, people leave a note with their contact information and insurance details. If there’s no note, look for witnesses nearby who may have seen what happened. You can also check for CCTV from nearby businesses, homes or on the street, as some areas have coverage. If you’re unsure, consider contacting the local council to find out whether cameras are in place that might have captured the accident.

If the driver didn’t leave a note, or if they did but are unresponsive or the information they provided seems incorrect, contact the police to report the accident and provide all the information you have, including photos, footage and witness statements. Be sure to request a copy of the police report, as it can be useful when dealing with insurance.

If you’re still having a hard time getting a hold of the at-fault driver and therefore cannot claim directly through their car insurer, it’s time to lodge a claim with your own insurance provider, if you have one. Provide them with as much information as possible, including the police report. From there, your insurer can determine whether your coverage, along with the information you have, will cover the damage to your car.

If your car insurer happens to find information about the at-fault driver and is able to have them lodge a claim so the costs of the damage are recoverable, you can contact Carbiz for a replacement car while your car is being repaired or until it’s been deemed a total loss. This ensures you’re not left without a car during this time, giving you peace of mind and the ability to keep your life moving.

For help organising your next steps, read our car accident insurance claim checklist and explore accident replacement vehicle options.

Read more
What It Means When Your Car Is Declared A Write-Off After An Accident

Updated 6 October 2026.

When an insurer declares a car a write-off, it has assessed the vehicle as a total loss under the policy. The damage may make repairs unsafe, or the cost of repairing the car may make a repair uneconomical. A write-off does not always mean the car is visibly destroyed.

How is a write-off decision made?

The assessment can take account of the vehicle's value, repair costs, salvage value and the policy terms. There is no single repair-cost percentage that determines every write-off across Australia. Ask the insurer for its assessment and the basis for its decision.

A total-loss insurance decision and a vehicle's written-off registration category are related but different matters. Whether a car can return to the road depends on the damage classification and the rules of the relevant state or territory.

Statutory and repairable write-offs

  • Statutory write-off: the vehicle meets specified damage criteria and cannot be re-registered for road use.
  • Repairable write-off: repairs may be technically possible, but the vehicle has been assessed as uneconomical to repair. This label does not itself authorise repairs or guarantee re-registration.

Requirements vary across Australia. In NSW, an eligible written-off light vehicle needs an Authorisation to Repair from Transport for NSW before work begins. Only limited applications are considered, and vehicles with statutory write-off damage are excluded. Approval, compliant repairs and the required inspections are separate steps.

What happens to your insurance payout?

The settlement depends on your cover and circumstances. It may be based on an agreed value, a market value or a replacement-vehicle benefit if your policy provides one. An excess, outstanding premium or finance arrangements may affect the amount you receive. Ask for a written breakdown before accepting the settlement.

Keep the assessment, photographs, policy documents and correspondence together. If you disagree with the valuation, provide relevant evidence and use the insurer's complaints process. See AAMI's explanation of total-loss claims for an insurer's example; your own policy determines your cover.

Getting around after a not-at-fault accident

If you need a replacement vehicle, tell Carbiz that your car has been declared a write-off. Eligibility, vehicle availability, the hire period and the terms of the agreement need to be confirmed for your circumstances. A write-off does not automatically entitle everyone to unlimited hire.

Contact Carbiz to discuss your accident replacement vehicle options. For a practical checklist, read what to do after receiving a write-off decision.

Read more