What jump lead goes on first?

Jump starting with a portable battery pack Connect the positive (red) lead from the battery pack to the positive (+) terminal of the battery. Connect the negative (black) lead to a good earth point on the casualty vehicle – a solid metal part of the engine is usually best.

What is red and black on jumper cables?

There are also positive and negative cables in the jumper cable set. The red one is positive (+), the black one is negative (-). Never connect the red cable to the negative battery terminal or a vehicle with a dead battery.

Do you connect red or black jumper cables first?

Organize the jumper cables First, unravel your jumper cables. Separate them so there is a red and black clamp on each end of the jumper cables. Red is for the positive battery terminal, and black is for the negative terminal.

What happens if you connect jumper cables in the wrong order?

When the jumper cables are incorrectly connected, the polarity of the electrical system on the vehicle with the dead battery will be reversed for a few seconds. This can irreparably damage many of the sensitive electronic components that are common on today’s vehicles, such as on-board computers and electronic sensors.

How to use jumper cable to jump start car?

1 Make sure both cars are turned off. 2 Connect one end of the red (positive) jumper cable to the positive terminal on the stalled battery. 3 Connect the other red (positive) cable to the positive terminal of the good battery. 4 Connect one end of the black (negative) jumper cable to the negative terminal of the good battery.

Where is the best place to hook up a jumper cable?

Instead, find a spot such as a clean bolt in the engine block. You may also place the clamp on an unpainted part of the car’s body underneath the hood. Avoid connecting this clamp to the dead battery unless you have no other choice. This produces a spark that can ignite hydrogen fumes after the car is turned on.

Where do the red and black jumper cables go?

The red cables lead to the “+” terminal and the black cables go to the “-” terminal. Check the terminals for corrosion first. It looks like white, green, and blue powder. Clean the terminals by wiping them with a rag or wire brush. Separate the jumper cable clamps by laying them on the ground.

How do you attach jumper cable to dead battery?

Attach one of the jumper cable’s positive (red) clamps to the dead battery’s positive terminal (marked with a “+” — it’s often covered with a red cap). Attach the other positive clamp to the good battery’s positive terminal. Attach the negative (black) clamp to the good battery’s negative terminal.