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:
“As the farmer casts into the ground the finest ears of his grain, the time will come when we too shall hold nothing back, but shall eagerly convert more than we now possess into means and powers, when we shall be willing to sow the sun and the moon for seeds.”
—Ralph Waldo Emerson (1803–1882)