Which Battery Cable Is Negative. Which is positive or negative on jumper cables. On a battery with tapered cylindrical terminal posts the positive terminal post should be of slightly larger diameter than the negative one.
Buy Battery Cable Here. Think of these cables as the large rivers that carry the water from the reservoir into a citys water main system. Generally speaking it has some red on it normally the negative cable has black on it.
When removing battery cables it is normal practice to begin with the negative terminal also known as the earth.
There are also positive and negative cables in the jumper cable set. A voltmeter is always applicable. Posted on Jan 03 2012. Ground the connection between the batteries by clamping the negative connector to an unpainted metal part of the car with the dead battery such as a nut or bolt on the engine or surrounding compartment.
