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.” When you are replacing your car battery, It isnt always easy to remember the order in which to disconnect and reconnect the terminals.

Why do you connect positive terminal first?

Connect positive first, negative having less potential wont arc. The higher the voltage, the greater the chance of arcing and fusion. On a car if negative first and you are touching any metal part of car, when attaching positive there is possibility of arcing through you. Your body becomes part of the circuit.

What happens if you connect negative first?

Negative pole first: Whole car (except a few parts like the positive pole) are connected. Any mistake with the other lead will lead to a short. If you mess up by touching the car with the other lead nothing will happen.

Does it matter what order you connect jumper cables?

The safest order to attach the jumper cables is as follows: Attach one red jumper cable clamp to the positive terminal on the dead battery. Attach the other end of the same cable, the second red jumper cable clamp, to the positive terminal on the working (live) car battery.

What happens if you connect positive to positive on a battery?

If you connect two positive but non-equal voltage nodes together, current will flow between them. Calling something positive only means that it has a higher voltage potential than something else which you are using as a ground reference. You can think of it as pressurized cans of air.

What order do you put jump leads on a car?

One end of the red jump lead should be connected to the flat batterys positive terminal. The lead must not touch any vehicle metal. Attach the red leads other end to the boosting batterys positive terminal. Take the black lead and connect one end to the boosting batterys negative terminal.

Do I connect positive to positive?

Connect to the positive cable to the positive terminal and the negative cable to the negative terminal of the good battery.

What happens when you connect the positive and negative terminals of a battery?

One terminal is marked (+), or positive, while the other is marked (-), or negative. If you connect a wire between the two terminals, the electrons will flow from the negative end to the positive end as fast as they can. This will quickly wear out the battery and can also be dangerous, particularly on larger batteries.