Why Remove The Negative Battery Cable First. By removing both cables you limit the possibility of accidentally re-energising the circuit. First things first your vehicle should be off.

Thats fairly obvious eh. 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. Click to see full answer Moreover why does negative battery terminal get hot.
A car batterys negative terminal has a cable that runs from it to the frame of the vehicle.
A slip of the wrench here creates a direct short to ground. A slip of the wrench here creates a direct short to ground. Because negative terminal of the battery is grounded to the body of the vehicle. By removing the negative battery cable you are disconnecting the pÃŪl from the chassis of your vehicle.

