What happens if you put jump leads on the wrong way?

What happens if you put jump leads on the wrong way?

If a battery was connected momentarily the wrong way during a jump start, their will likely be a small amount of damage. But, if the connection persists for a while, the electrical current doesn’t have anywhere to go, and damage to the battery is likely to occur.

What happens if you connect positive to negative?

Connecting the battery terminals in reverse can cause serious damage to the battery itself, the electrical components, and even to yourself. Each terminal of a car battery uses 12V of current with positive and negative orientation.

What happens if you put positive on negative?

If the positives and negatives are switched, the battery will try to compensate and make the negative 12 volts into a positive charge resulting in a huge surge of power and an enormous amount of heat to be produced.

What happens if you cross positive and negative wires?

Reversing the polarity in a circuit can ruin the power source or even cause an explosion. Connecting the wrong wires, like using a positive wire when it should be a negative wire, can also fry the wires themselves.

Why should you never connect jumper cables to the negative terminal of a dead battery?

Never connect the black cable to the negative (–) terminal on your dead battery. This is very dangerous, could result in a possible explosion.

Does the order of jumper cables matter?

Don’t attach the negative (black) clamp to the negative terminal of the dead battery. It is important to connect the cables in that order, and it is safest to connect the negative (black) clamp as far from the battery as possible, in order to reduce the risk of sparking that could cause a fire or explosion.

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.

How to properly connect the jumper cables?

Turn off both engines leaving keys in the off position if applicable

  • Turn off all devices that might be using power,e.g.
  • Try to get the two vehicles as close together as possible but not actually touching.
  • Attach the connector on one end of the red jumper cable to the positive terminal on the battery that is flat.
  • What happens if you reverse jumper cables?

    What happens if you reverse jumper cables? When you reverse the polarity of the jumper cables, you create a drastic increase in the amount of electrical current that runs through them. As a result, the cables may melt or even catch fire.

    What is the order to hook up jumper cables?

    Place both vehicles in Park or Neutral and shut off the ignition in both cars.Engage both parking brakes as well.

  • Attach one of the red clips to the positive terminal of your battery.
  • Attach the other red clip to the positive terminal of the other car.
  • Attach one of the black clips to the negative terminal on the other battery.
  • What size jumper cables should I carry?


  • What are some factors to consider when choosing a set of jumper cables?
  • What gauge jumper cable do I need?
  • Do Jumper Cables Go Bad?
  • Jumper Cable Amperage
  • What are the red and black colors on Jumper Cables?
  • Can jumper cables shock you?
  • What happens if I accidentally reverse the jumper cables?
  • Final Thoughts…