Why are there two metal posts on a battery?

Take a look at any battery, and you’ll notice that it has two terminals. One terminal is marked (+), or positive, while the other is marked (-), or negative. If you connect a wire between the two terminals, the electrons will flow from the negative end to the positive end as fast as they can. …

Can a battery negative post be connected to a lug?

The battery negative post terminal, as well as the battery negative cable or lug, should neverconnect to any type of device or accessory equipment unless that device is fully ground isolated on the cabinet and on all ports.

Is there a secondary wire to the positive battery?

I have had this happen before, so I got out and took a look at the battery. In addition to the larger 8ga wire leading from the positive battery terminal, there is a secondary wire, maybe 16ga, with a fuse connected to it. I found that the end of the wire had turned turquoise with the copper corroding, until the wire was no more.

What happens when a battery ground post loosens?

A battery ground post can loosen over time. When the ground or positive posts become loose, this can cause problems such as a battery that won’t start or battery fluctuations that cause the vehicle light to flicker.

What happens when I attach the negative battery cable to…?

If you connect the negative first, then the positive, if you happen to touch the wrench to something metal while it is touching the positive terminal, that’s a short – because the chassis is already connected to the negative battery terminal. Best case, there will be a very big, very bright spark followed by substantial swearing.

How to connect two wires to a 2 post block?

On the 2-post block use the empty post that you didn’t use before. 7-Then, to complete this circuit, connect two wires from your ignition switch to the terminal block. The two ignition switch wires may be color-coded but it makes no difference which way they go. For the 2-post terminal block, it’s easy, one wire goes to each post.

What happens if you pull a battery cable while running?

Not quite sure if you said you pulled a battery cable while it’s running. If so don’t do that. It could send a voltage spike to the computer that would fry it. Can you describe your technique for measuring what is know as a parasitic draw? many people get confused with setup when they try and measure amps.

What are the ends of a battery terminal?

. Battery Terminal Connectors with 3 Way, Top Post Battery Terminal Ends, Copper Plate, Positive and Negative, Applicated in Car,Boat, Van and More. (Copper Plate with 3 Bolt)