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How to Jump Start Your Car Battery, Connect Jump Battery | Know How Long to Charge a Dead Car Battery | Highway Auto Batteries Rockhampton.

Automotive Engineers. Car Technology Pioneers Since 1966 - Updated 20/06/2019

How to Jump-Start a Car Battery the Right Way

It has probably happened to you before. You go to turn on your ignition, and nothing happens. Maybe you hear a few clicks. Another dead car battery? You need to fix this and get your vehicle back on the road - fast. If you are prepared, you already have a good set of jumper cables in your car. Now all you need to do is to learn how to jump start a car battery.

Safety Precautions

You should consider all safety risks before performing any basic maintenance or repair on your car. First, make sure that small children are in a safe area away from the engine while you are establishing how to jump a dead car battery. Take a moment to read the manual of your car. Some vehicles require extra steps in order to have a successful jump. If you’re unsure of what to do, contact Highway Auto Rockhampton for advice. Assuming that your car will permit a jump start, you should be careful to prevent dangerous electric shocks.
jump start a flat battery rockhampton

Identify the battery connections.

First, you need a fully charged battery, this can be a standalone battery or the battery in another vehicle. Next identify the terminals on the dead battery and the donor battery. Red is positive also marked with a (+ ) sign, Black is negative marked with a minus sign (-). This distinction is crucial to the success of your jump connection. If the battery terminals are dirty, wipe them off with a rag or wire brush.
jump start a flat battery diagram.

To prepare for the jump

1. Park the donor car so that the vehicles face each other, preferably only about 30cm apart, but never touching each other. For automatic transmission cars, put the vehicle in park; for a manual transmission, set the vehicle to neutral.

2. Set the parking brakes on both, so neither car moves unexpectedly.

3. Both cars should be turned off, with keys removed.

4. Set down the jumper cables on the ground, making sure the clamps do not touch each other.

jump start a flat battery diagram-2.

Now, begin attaching the jumper cables:

1. Attach the red, positive cable clamp to the positive (+) battery terminal of the dead battery. You want a secure connection to the battery terminal, which may require some initial wiggling of the clamps.

2. Attach the red, positive cable clamp on the other end of the jumper cables to the donor vehicle’s positive (+) battery terminal

3. Connect the black, negative cable clamp to the donor battery’s negative (-) battery terminal. Walk over to the car with the dead battery. Do not connect the black, negative cable clamp to the dead battery. Instead, attach that clamp to an unpainted, metal part of the car such as a shiny, clean nut on the engine block. This will help ensure a safe jump connection and isolate any sparking that may occur away from a battery.

Know How Long to Charge a Dead Car Battery

Now you’re ready to attempt the jump-start. Follow the instructions below to find out how and how long to charge your car’s dead battery:

1. Start the donor vehicle

2. Wait a minute or so. Depending on the age of the battery and how long since it died, you may need to let the car run for 5 minutes or more to get the boost to work.

3. Try starting the dead car. If the car doesn't start, allow the working vehicle to charge the battery for an additional 5 minute or more before attempting again. In some instances, slightly revving the engine of the working car while charging the dead battery may help.

4. Once the dead car is running, you may disconnect the jumper cables, starting with the black, negative cable clamps. Do not let the clamps touch each other while any part of the cables is still attached to a car.

5. Now, drive the vehicle. This will allow the battery to build up a charge. This driving allows the vehicle’s alternator to charge the battery and ensures that your vehicle does not die again once you turn it off. Note: Simply driving a vehicle with a discharged battery will not restore full charge. In every case the battery must be recharged with a battery charger.

If the Jump-start Fails

If the jump fails to start your car after a few short attempts, or if the car starts but then dies again, you have some other issues you need to address. Most batteries are rated to last 2-3 years. If your battery is old, you may need to replace it. If the battery should be working well, you should consider other possible problems with other components, including:
  • fuses
  • battery corrosion
  • faulty alternator
  • ignition switch
  • starter motor
If you’re unsure of what to do, contact Highway Auto Rockhampton for advice (07) 4926 1303.

Essential Battery Information Pages


66 Point Safety and Reliability Checkup.

Highway Auto Authorised Service centre can provide a 66 point safety report upon request to help identify any issues your vehicle may have. This report involves a road test, under hood inspection, under vehicle inspection and an interior/exterior inspection to ensure your safety.