Ground (earth)
Modern cars have a "negative earth" electrical system. In this case the negative terminal of the battery is bonded to the vehicle's chassis (the metallic body work) and the positive terminal provides the "live" wire to the various systems. However, some older cars were built with a "positive earth" electrical system, in this case the positive terminal of the battery is bonded to the chassis and the negative terminal for the live.
Read more about this topic: Electrical Polarity
Famous quotes containing the word ground:
“The democrat is a young conservative; the conservative is an old democrat. The aristocrat is the democrat ripe, and gone to seed,—because both parties stand on the one ground of the supreme value of property, which one endeavors to get, and the other to keep.”
—Ralph Waldo Emerson (1803–1882)