Which battery terminal Do I disconnect first?
It’s a good idea to wear eye protection when working around batteries.
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..
Is it OK to just disconnect the negative terminal?
In order to disconnect the battery, all you have to do is remove the cable from the negative port. Do not let the negative and positive cable ends touch under any circumstances.
What happens if you connect the negative terminal first?
If you first connect the negative cable, then when you connect the positive cable there is a chance the wrench will complete a circuit between the battery and the chassis of the car. … If the battery is offgassing, the spark could ignite those gases causing an explosion.
What happens if you don’t disconnect the negative battery cable?
The electrical power in a car’s engine is activated by the battery. Contact between the negative battery terminal and the battery, even if the cable is not clamped onto the battery, may reactivate the electrical system within the car.
What happens if you disconnect the positive terminal first?
If you begin to remove the positive side before the negative and your wrench would make contact with any part of the vehicle, then you could cause a short in the system. This could in turn blow fuses and relays or even damage some of the sensitive electronics on your 2016 Chevrolet Tahoe.