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:
“Some people are like ants. Give them a warm day and a piece of ground and they start digging. There the similarity ends. Ants keep on digging. Most people don’t. They establish contact with the soil, absorb so much vernal vigor that they can’t stay in one place, and desert the fork or spade to see how the rhubarb is coming and whether the asparagus is yet in sight.”
—Hal Borland (1900–1978)