Install the disconnect switch on the positive battery cable: Construction equipment and over-the-road trucks often use this design. A concern with positive-side kill switches is the same as when ...

Next, connect the cables just as you would ordinary jumper cables—positive clamp to the positive battery post and negative clamp to the negative battery post or a metallic engine component or chassis ...

Brush away any dirt or gunk from the posts, because you'll need to create as clean and solid connection as you can. First, connect one end of the red clamp to the positive post on the dead battery.