How do you disconnect and reconnect a car battery?

“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.”

Why do you disconnect the negative side of a battery 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.

Do you need to disconnect a car battery to charge it?

Although charging a car battery while still connected or in situ is possible, it’s always a good idea to disconnect the battery before charging after a quick clean.

Will unhooking battery reset the computer?

That’s because, if you disconnect your battery for long enough to reset the computer, it may cause the processor to forget everything it has learned. Leaving the ECU without power for a significant amount of time (over 5 – 10 minutes) will likely cause it to reset back to square one.

Does power or ground connect first?

In any electrical connection sequence you always connect the Ground first, the neutral then the hot. BUT and here is the main part of this – before making any connections you must make sure that the circuit you are working with is not energized.

How do you disconnect a car battery without a remote?

Steps Take the necessary precautions before you try to disconnect your battery. Find the negative terminal on the top of your car’s battery. Determine what size socket you need to loosen the nut on the negative terminal. Follow the same procedure to disconnect the positive terminal. Continue with your work.

What happens if you disconnect the negative on a car battery?

Simply disconnecting the negative terminal will safely break the circuit and your car’s electronics will not be draining your battery while you’re away. If you disconnect the positive as nothing bad will happen, but you won’t be accomplishing anything more than by simply disconnecting the negative.

Where does the negative terminal of a car battery connect to?

The negative terminal of the car battery connects to the frame right beside the battery. That means that if you go to disconnect the positive terminal first with a metal wrench and you bump anything that is metal that is also connected to the frame of the car, you will automatically complete the circuit and begin to short out the battery.

How do I remove the negative battery cable from my battery?

First, unbolt the negative battery cable and disconnect it by lifting it free. It might take some wiggling and twisting to pull it off. Be sure never to let the wrench touch both the negative and positive terminals at the same time.