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what order do you disconnect battery cables

by Holden Feest Published 3 years ago Updated 3 years ago

Instructions

  1. First of all you need to access battery. For this, raise the hood of the car to see the battery clearly.
  2. You will need a wrench to loosen clamps or connectors connecting the cables to the battery's coil. ...
  3. Remove negative cable from coil of the battery. ...

More items...

“Positive first, then negative. When disconnecting the cables from the old battery, disconnect the negative first, then the positive. Connect the new battery in the reverse order, positive then negative.”

Full Answer

What is the correct way to disconnect the battery cables?

Always disconnect battery cables exactly in this order; disconnect the BLACK negative cable first, and then disconnect the RED positive cable. Always connect battery cables exactly in this order; connect RED positive cable first, then connect BLACK negative ground cable.

What is the correct order to connect/disconnect the terminals?

Technically, you can connect/disconnect the terminals in whatever order that you want to; however, doing it in the proper order significantly reduces the chances of anything going wrong. Basically, you should disconnect the negative terminal first when removing the battery, and connect the negative terminal last when installing the battery.

Is it safe to disconnect car battery cables?

If you have to remove your car battery to replace it or to assess corrosion damage, it's important to know how to disconnect car battery cables and clamps safely. The battery will not present too many challenges in most cases, especially if it's only three to four years old.

Do you disconnect the negative battery terminal first?

Basically, you should disconnectthe negative terminalfirst when removing the battery, and connect the negative terminallast when installing the battery. Click to see full answer. Furthermore, which battery terminal do you disconnect first?

Do you unhook ground or positive first?

Second, always remove the battery's ground clamp before loosening the positive.

Why do you disconnect the negative battery terminal first?

Negative first It's important to disconnect the negative side of the battery first, otherwise you can cause an electrical short if the positive is removed first.

Is it OK to just disconnect the negative terminal?

Disconnect battery negative cable It is a good practice to always disconnect your negative battery terminal first, to minimize the risk of sparks that can lead to car electronics damage and battery explosion. Once you have located the negative terminal, use the wrench to free the nut that tightens the terminal.

What happens if you disconnect the battery while the car is still running?

Removing the battery from the circuit allows those spikes and transients to travel around, endangering every semiconductor circuit in your car. The ECU, the speed sensitive steering, the memory seat adjustments, the cruise control, and even the car's stereo.

What happens if you disconnect a battery?

Once you disconnect the battery, you can proceed to clean the entire area, getting everything ready for your replacement battery.

What to do when working around a battery?

Any time you're working around a battery, it's also important to remove any metal jewelry like rings or bracelets. Also, be sure to wear safety glasses and gloves for personal protection. Finally, always be mindful of your tools.

Where is the battery located on a car?

In some models, it might be located in the back, usually in the trunk behind the lining. Some models even have the battery under the floorboard or the rear seat. Look around to find it or consult your owner's manual for information specific to your vehicle.

Can you remove a battery clamp?

If so, it may be difficult to remove the clamps. In this case, do not use power tools or a hammer to try to remove the clamps. You might need to contact a professional to help you remove the battery safely. Any time you're working around a battery, it's also important to remove any metal jewelry like rings or bracelets.

Do you need to clean a car battery?

Although you don't necessarily need to clean the battery if you're discarding it, you may want some water mixed with baking soda to clean the tray the battery is placed on and the clamps of the cables that connect it to the car.

How to connect a good battery to a supply car?

2. Connect Good Negative. Attach the negative or black clamp to the negative terminal on the supply battery. 3. Start the Supply Engine. With both positive cables connected and the negative connected to the good battery, start the supply car’s engine. 4.

How to connect jumper cables?

1. Connect Positive Cables First. Connect one positive or red cable end to the positive or red terminal on the dead battery. Connect the other end to the positive terminal on the good battery. 2.

What happens if you connect a battery cable to a car when you jump?

Improperly connecting a car battery cable when jump starting your car can cause serious damage to your car, the car supplying the jump and possibly cause severe injuries from burns to you and the helpful motorist supplying the jump.

How to start a car when battery is dead?

Start the Car. Allow the dead battery to charge for a minute or two and then attempt to start it. If it doesn’t start right away, allow the supply battery to charge the dead one for at least five minutes and attempt to start it again. 6. Disconnect Immediately.

How to disconnect a car battery?

To disconnect a car battery, start by turning off the engine and opening the hood so you can access the battery. Wear eye protection when working with the battery to protect your eyes from sparks. Locate the positive and negative terminals on the battery.

Why disconnect battery in car?

During your vehicle's lifespan, you may need to disconnect the engine battery for a variety of reasons ranging from simple car maintenance to full engine repairs. Though it might seem intimidating, the process is incredibly simple and can be done in less than a minute once you know how.

How to get a stuck battery out of a car?

Then, unbolt the positive battery cable and lift that off too. If the battery is still stuck, you’ll need to use a socket wrench to unbolt the clamp that’s locking the battery in place. Otherwise, lift the battery out of the vehicle, and you’re done!

How to loosen a battery nut?

Ascertain visually the socket size you'll need to loosen the nut. Put the appropriately sized socket on your wrench. You might have to attach a wrench extender to reach the nut.

What is the red cap on a battery?

The positive terminal usually has a red cap or a plus sign on the battery near its connection post. 3. Determine what size socket you need to loosen the nut on the negative terminal. Always work on the negative terminal before the positive when you disconnect your battery.

How many volts does a hybrid battery produce?

Helpful 6 Not Helpful 4. Batteries in hybrid vehicles produce more than 300 volts, which is a potentially lethal level. If you need to work on any electrical component in a hybrid vehicle, disable the high-voltage battery in the back of the car first. The wiring is usually color-coded in orange.

Can you fully charge a car battery when you reconnect it?

However, when you do reconnect your battery, it would be a good idea to drive your car somewhere, where you can fully-charge the battery, so you don't put unnecessary stress on your vehicle's charging system.

Does the Digital 1200 charge batteries?

The Digital 1200 can charge batteries faster and offers more features, like a lighted positive clamp and a USB charger, but if you have plenty of time to charge a battery, the less expensive Digital 400 will work just fine.

Is a car battery fully charged?

If that sounds too complicated for your level of mechanical ability, it's safe and conservative to assume your car battery is not fully-charged, because the fact of the matter is, most car batteries are not fully-charged.

What to do before disconnecting car battery?

Before disconnecting the battery, make sure you are not wearing any jewelry such as a ring, watch, or a bracelet.

How long does it take to disconnect a car battery?

There are some easy steps you should take to disconnect your car battery from your car. Here are 7 steps to do it in a really safe way. Total Time: 5 minutes. 1.

How to open hood when ignition is off?

Once the ignition has been turned off, open the hood by pulling the hood lever or pressing the button which is usually located somewhere below and near the steering wheel. Refer to your car owner’s manual if you can’t find the hood lever. Some cars have the battery located in the trunk and if so, open your trunk.

How heavy is a battery?

Batteries are usually heavy, especially if you drive a truck or an SUV which has a battery weighing almost 40 pounds. To install the new battery you can use the same guide but backward. Put the battery in place and fit the bracket or strap. Start with installing the positive terminal and the negative terminal after.

What happens if you remove the battery terminals on a radio?

By removing the battery terminals, your settings in the clock or radio may get reset and you also may have to enter the radio code. If you do not have the radio code you may have to go to a dealership for them to unlock the code.

Where is the battery located in a car?

You can find information about this in your owner’s manual. 3. Locate the battery. If your car battery is located under the hood, go towards the front of your car and open the hood.

Can you start a car with a faulty battery?

Since you cannot start your car with a faulty battery, it is highly important to keep it maintained properly. The car battery terminals get corroded over time due to the hydrogen gas that is released from the acid in the battery. In such a case, you’ll be required to remove the battery and clean it thoroughly.

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Identifying Battery Cables

Which Battery Cable Should Be Removed First?

  • You should always remove the negative battery cable from its connector first. Look for the negative terminal with either a minus sign or a black cap. This simple step helps you avoid any spark or electric shock. To disconnect the battery cable, you will need a socket wrench, typically 10mm. It needs to fit on the connector bolt. Turn your wrench co...
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Which Battery Cable Should Be Reconnected Last?

  • The negative battery cable should be installed last, and the positive cable first. When you are putting a new battery in or have finished jump starting it, you have to be careful to reconnect it appropriately. If you follow the steps you took to remove the terminals, you would simply do everything in reverse order. With these guidelines in place, you must connect the positive termin…
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Why Disconnect Negative First?

  • If you fail to remove the negative connection from the battery first, you put yourself at risk of an electrical short. As an example, if you were to drop a metal tool on the positive terminal and it also touches anything metal on the vehicle, you could create a circuit. This problem will short your battery. It can also give you one heck of a shock. That’s why the negative cable should always b…
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