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 put jumper cables on in wrong order?

Hooking the jumper cables up backwards can create disastrous results⁠. Possible outcomes include irreparable damage to the battery, fried electronics, and even serious personal injury. You might cause personal injury and/or damage to your car if you accidentally hook your jumper cables up wrong.

Does it matter what order you take jumper cables off?

Disconnect the cables in the reverse order: First remove the negative cable from the car you jumped, then the negative cable from the car with the good battery. Then remove the positive cable from the car with the good battery (dont touch a grounded part of either car with the clamp of the positive cable).

Does it matter what order you jump a car?

The order of the connection (red to dead, red to donor, black to dead, black to metal) reduces the chance of shorting the good battery. A quick test that there is enough voltage for the donor, be sure that the car giving he jump starts headlights are steady and bright when the car is started.

Can you connect ground to negative?

The negative terminal of the battery is connected to your car body, so you can connect your sirens negative terminal directly to your closest ground point (car metal body). Theres no reason to have multiple cables on your batterys terminal. Cable harness will be more organised.

Can you ruin your car by giving someone a jump start?

If you dont connect the jumper cables to your car and the car youre jump-starting in the right order, you could cause expensive electrical damage to your car – or even explode your battery.

Do you hook up negative or positive first?

“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.”