Car Care Tips: Here’s How to Jumpstart a Dead Battery

Has your car’s battery died, leaving your vehicle stranded? Jump-starting the battery can be an effective way to get up and running again in an emergency, but you’ll need to carefully follow the instructions in your vehicle’s owner’s manual to perform this task safely. Modern vehicles have so many complex electrical components that can be damaged by an electrical surge, which is why you need to pay close attention to all safety precautions. Below are the main steps recommended by our battery experts at Performance Toyota near Cincinnati, OH. If you have any immediate questions or need help because you’ve found yourself stranded, click the button below to call our service center today!

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Precautions Before Jump-Starting a Battery

Before you jump-start your battery, make sure that the two vehicles involved are close enough so the jumper cables can reach easily but not so close that they touch each other. You should also ensure that the batteries in both vehicles have the same voltage. Most modern cars have 12-volt batteries, so this shouldn’t be a problem.

Due to the vast amount of computer software in modern cars, it’s a good idea to turn on the heater blower motor before jump-starting your battery. This step can minimize any damage that an electrical surge may cause. Otherwise, ensure that all lights and other electrical components are turned off in the car with the dead battery. Finally, make sure that the ignitions in both vehicles are in the off position and the transmissions are in neutral for manual or park for automatic. Put the parking brakes on to ensure that neither car moves unexpectedly.

Connect the Jumper Cables

Before you start connecting the jumper cables, it’s advisable to put on a pair of goggles. Despite all the precautions you may take, there’s still a chance that a battery could explode during a jump-start.

When you’re ready to connect the cables, start by connecting the red jumper cable to the positive terminal of the dead battery. If you can’t see the terminals of the dead battery, you may have to clean away the grime first. Next, connect the other end of the cable to the positive terminal of the booster battery or jump-start terminal.

Then, connect the black cable to the negative terminal of the booster battery or jump-start terminal. You should connect the other end of the black cable to a well-grounded bolt or bracket on the engine of the car you’re trying to jump. Connecting the black cable to the engine rather than directly to the dead battery reduces the risk of the dead battery exploding when you try to jump-start it.

Start the Engines

Once you’ve completed the connections in the order outlined above, you can start the engine of the vehicle with the good battery. You’ll need to keep it running at a moderate speed to charge the battery for about a minute or so. If the battery has been dead for a long time, you may need to run the engine for two or three minutes to let it charge.

You should then start the engine in the vehicle with the dead battery. Reduce the engine to idle and ensure that all switches in the vehicle being jumped remain off to prevent any damage. Finally, you can remove the jump-start cables in the reverse order you connected them. Be extra careful never to touch the red and black terminals against each other.

If the jump-start works, you should take your car for a short drive of between 20 and 30 minutes. This period will give your car’s alternator the time to charge your battery so that it doesn’t die again when you turn off your car.

Dangers When Jump-Starting Your Car Battery

One of the main dangers when jump-starting your battery is the potential damage the process can cause to your vehicle’s electrical systems. Because most modern trucks, SUVs, and sedans are loaded with complex computers and high-end technologies, such damage can result in hefty repair bills. For this reason, it’s vitally important that you carefully follow any specific instructions for your car’s make and model, which you’ll find in your owner’s manual.

If you don’t have access to your owner’s manual, we wouldn’t recommend that you try jump-starting a car on your own. Instead, contact your roadside assistance or a professional service technician. Your safest option may be to simply have a new battery installed since new batteries are comparatively cheap.

Why Car Battery Maintenance Is Important

Even if you succeed in jump-starting your battery, the risks involved in this procedure mean that you don’t want to repeat it regularly. A battery that needs jump-starting is usually nearing the end of its life and needs replacing.

However, there’s no need to wait until your battery needs a jump-start to find out if it’s time for a new one. If you follow your vehicle’s recommended maintenance schedule, one of our expert Toyota-certified mechanics at our service center can identify the warning signs of a weak battery so that you can get a new one before it dies.

Car batteries typically have a working life of three to five years. If your battery is approaching this age, it’s a good idea to have it tested by one of our technicians. A quick battery test can determine whether your battery can hold enough charge to provide power for your vehicle. If we detect that the charge is falling, we can install a new battery for you.

You can also look out for other warning signs that your battery requires replacing. If your engine takes longer than usual to turn over when you hit the ignition button, that’s a sign of a weak battery. Another common symptom is if your headlights dim slightly when your car is idling, then brighten up when you drive off. The most likely reason for this is that your battery isn’t producing enough power to run your vehicle’s electronics.

If you still have any questions about jump-starting your battery or battery care in general, feel free to give us a call at (513) 874-5535 or contact our sevice team online. Here at Performance Toyota near Cincinnati, our service center can provide you with all the advice and professional maintenance services you’ll need to keep your Corolla or Tundra on the road.

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