How To Reconnect A Car Battery [In 7 Easy Steps]

If your car battery needs to be replaced, you will need to know how to change it. Luckily, this is an easy process and does not require many tools. Let's take a look at how to reconnect your car battery below.

To reconnect your car battery, follow these steps:

  1. Remove keys from the ignition.
  2. Insert the new battery.
  3. Secure your battery in the mounting bracket.
  4. Connect the positive battery cable.
  5. Connect the negative battery cable.
  6. Tighten both battery cables.
  7. Check to see if the vehicle starts.

Knowing how to connect a new car battery properly can save you time and money. In this article, we will discuss each of these steps in more detail to ensure that you can reconnect your battery correctly. In addition, we will answer other frequently asked questions about vehicle batteries, so read on!

Charging battery car with electricity trough jumper cables, How To Reconnect A Car Battery [In 7 Easy Steps]

How Do You Reconnect A Car Battery?

Reconnecting a car battery is a simple process that you can complete in minutes. All you need is the new battery, some basic tools, and to follow these easy steps:

Service and maintenance and car maintenance

Remove Keys From The Ignition

The first step is to remove the keys from the ignition. This will ensure that none of the electronics turn on during the process. If they do, it could cause electrical damage to the vehicle.

Insert The New Battery And Secure It

The next step is to insert the new battery into the vehicle. Ensure that it is correctly secured in the mounting bracket before moving on to the next step. You may need a small wrench or flat-head screwdriver to secure it.

This will ensure that it does not move around while you are working.

Connect The Positive Battery Cable

When disconnecting a car battery, you should disconnect the negative terminal first. However, when reconnecting, you should connect the positive terminal first. This will help to prevent any short circuits from occurring.

The positive terminal is red and is usually labeled with a "+" sign.

Connect The Negative Battery Cable

Once the positive battery cable is connected, you can join the negative battery cable. The negative terminal is usually black and is labeled with a "-" sign.

Tighten Both Battery Cables

After both battery cables are connected, you will need to tighten them down. This will ensure that they do not come loose while you are driving.

Check To See If The Vehicle Starts

The final step is to turn on the ignition and see if the vehicle starts. If it does, then you have successfully reconnected the battery.

If it does not start, you may need to check the connections. In addition, check for any corrosion on the terminals. If there is corrosion, you will need to clean it off before proceeding.

How Long Do Car Batteries Last?

The average car battery will last between three and five years. However, this can vary depending on the make and model of the vehicle and how often it is driven.

For example, if you have an older vehicle not driven very often, the battery may last longer. On the other hand, if you have a newer car driven frequently, the battery may need to be replaced more often.

If you are not sure how to replace your car battery, take it to an automotive specialist for an inspection. They will be able to check the battery and let you know if it needs to be replaced.

What Are The Signs Of A Dying Car Battery?

There are several signs that a car battery is dying. Let's take a look at them below.

Checking Car Battery

Slow Start

If it takes longer than usual for your vehicle to start, this could signify that the battery is dying. The car isn't getting enough power from the battery to start the engine.

Check Engine Light

If your vehicle throws a check engine light, this could also signify that the battery is dying. The check engine light indicates an issue with the vehicle's electrical system. You can scan the code to see if it is related to the battery.

Dim Headlights

If your headlights seem dimmer than usual, this could signify that the battery is dying. This is because the battery is not providing enough power to run the headlights at their full brightness.

Clicking Sound When Starting

When the engine won't turn over, and you hear a clicking sound, the battery isn't sending any power to the starter. Charge the battery or replace it to solve this problem.

Won't Hold A Charge

If you have charged the battery for it to lose its charge over time slowly, this is another sign that needs to be replaced. However, if your battery isn't over three years old, this could be due to a bad alternator and not a dying battery.

Swollen Battery Case

If the battery case is bloated or swollen, this is a sign that the battery is overcharging. This can be caused by a faulty alternator or charging system. Replace the battery to solve this problem.

Rotten Smell

If you smell something bad coming from the engine bay, this could signify that the battery is leaking acid. This is dangerous, and we recommend taking your car to the shop as soon as possible.

Corroded Terminals

Another sign of battery leakage is corrosion on the battery terminals. This can prevent the battery from receiving or sending power. Clean the terminals with a wire brush and then install a new battery.

Automobile Battery terminal with acid and warning lable

How Do I Make My Car Battery Last Longer?

There are several things that you can do to prolong the life of your car's battery. Some easy steps to take include:

Keeping It Clean

One of the best ways to prolong the life of your battery is to keep it clean. This means removing any dirt, grime, or corrosion that might build up on the terminals.

You can do this with a wire brush or baking soda and water solution.

Don't Let Your Car Sit Too Long

If you are not going to be driving your car for a while, you should disconnect the battery. This will prevent it from draining and prolong its life.

Drive Your Vehicle Often

If you only use your car occasionally, the battery may not get enough power to stay charged. Try to drive your vehicle at least once a week to keep the battery from dying.

Keep The Electrical System Maintained

Another way to prolong the life of your battery is to keep the electrical system in good condition. This means making sure that the alternator and charging system is working correctly.

In addition, clean the battery terminals regularly to avoid corrosion.

Avoid Extreme Temperatures

Extreme temperatures can shorten the life of your battery. This means that you should avoid letting your car sit in very hot or cold weather. If you need to store your vehicle, remove the battery and put it in a cool, dry place.

Check The Battery Regularly

You should check the battery regularly to ensure that it is clean and in good condition. This will help you spot any problems early on and prevent them from becoming worse.

How Do You Jumpstart A Car Battery?

Charging car battery with electricity trough jumper cables

If your car won't start and the battery is dead, you will need to jumpstart it. This means using a jumper cable to connect the battery to another car with a working battery.

Follow the steps below to jumpstart your car's battery:

  1. Park the working vehicle next to the vehicle with the dead battery. Make sure that the two are not touching.
  2. Turn off both engines and all electrical accessories.
  3. Connect one end of the positive jumper cable to the dead battery's positive terminal.
  4. Join the other end of the positive jumper cable to the positive terminal of the working battery.
  5. Connect one end of the negative jumper cable to the working battery's negative terminal.
  6. Finally, connect the other end of the negative jumper cable to a metal ground on the vehicle with the dead battery. This could be a bolt or a nut.
  7. Start the working vehicle's engine and let it run for a few minutes.
  8. Now try starting the engine of the vehicle with the dead battery.
  9. If the engine starts, disconnect the jumper cables in the reverse order that you connected them.
  10. Let the engine of the vehicle with the dead battery run for a while to recharge the battery.
  11. If the engine doesn't start, make sure the cables are secure on both vehicles and try again. If it still doesn't start, the battery might need to be replaced.

Final Thoughts

Charging battery car with electricity trough jumper cables


The battery plays a vital role in your car, and it is essential to keep it in good condition. When replacing the battery, connect the cables in the order specified in the user manual. Failure to do so can cause damage to your car's electrical system.

Made it to the end? Check out these helpful related posts below!

Trailer Battery Not Charging—What To Do?

Can A Bad Car Battery Cause Computer Problems?

How Long Can A Deep Cycle Battery Last Without Charging?

Share this article

One comment

  1. When connecting the terminals, I can connect the positive and when I try to connect the negative the motor tries to start. The ignition is off and the key is removed. This is on aside by side(UTV)

Leave a Reply

Your email address will not be published. Required fields are marked *