In the unfortunate event that you might need to jump start your car, knowing how to do so will be a useful piece of information that may come in handy.
You may need to jump start your car when your car battery is flat or unable to store enough energy to power your vehicle. Using jump leads will give your car the boost of energy that it needs to recharge the battery and allow you to continue your car journey.
The most common battery used in new vehicles are a 12-volt battery with the average car battery life between three to five years but many factors can contribute to the lifespan of the battery. Other vehicles such as trucks and military vehicles use two 12 volt batteries to sustain high power usage.
Firstly, switch off your engine making sure all devices are turned off. For example, Lights, CD player, sat-nav and any other devices. Remove your key away from the ignition and keep away from your car.
The working car that you are using to jump start your car should also be turned off before connecting the jump leads.
Position the working vehicle a short distance away the dead car. Firstly, connect the red positive lead to the positive battery terminal of the dead car, connecting the other end to the working vehicle.
Secondly, attach the negative lead to the black negative battery terminal of the working vehicle, connecting the other end to the negative terminal of the dead battery securely to make sure that the connection to a full circuit.
Start the engine of the working vehicle allowing it to run for around 5 minutes to charge the dead battery.
Start the car remove the cables in reverse order ie, remove the black negative cable then the red positive cable. Your vehicle should now be ready for the road.
Turn off all electrical devices and make sure your keys are removed away from the ignition.
Turn off the battery charger
Connect the red positive lead to the positive terminal on the battery then connect the black negative lead to the terminal or uncovered metal parts of the engine.
Switch on the booster pack and give the battery time to charge.
Turn on the engine, switching the battery pack off and remove all cables in reverse order starting with the black negative one first.
When jump starting a 24 Volt battery the battery is built up by two 12 volt batteries although you can use the same process as above. When changing over the cables from one battery to the other make sure that you turn the engine off the assisting vehicle or booster pack before removing and reconnecting the cables.
You can charge both batteries at the same time using a working vehicle and a booster pack.
Make sure the charging pack is switched off before connecting it to the battery. Connect the red positive cable to the positive terminal and black negative cable to the negative terminal.
Use jump leads to attach the cables to the other battery, without connecting the other ends to the working vehicle.
Attach the negative cable to the negative battery terminal then continue for the positive.
Switch on the booster pack connecting the jump leads to the working battery and turn on the engine. Allow the engine to run for a few minutes to help charge the dead battery.
Start the engine of the dead vehicle and switch off the engine of the working vehicle. The dead vehicle should now be working, however let the vehicle run for a few minutes.
Switch off the engine of the dead car and remove booster pack switching it off and removing negative cable first. Make sure that the battery pack is not removed whist the engine is still running.
Start the car and remove the other cables.
We hope that you get back on the road with our handy tips, however, if you are considering getting a new car battery, simply enter a few details at the RAC Shop to check what is available.