Starters take a lot of power. Just a regular electric switch will not work because the wires have to be so big to handle the high Amp load. When you think of Amps, think of Volume. Think of Volts as pressure. You can have a lot of pressure in a small wire, but it must be contained.
Scion is a sub-brand of Toyota and a niche trade name aimed at young buyers. Founded in 2002, the Scion line is composed entirely of small vehicles powered by four-cylinder engines, with most models priced below $20,000.
A vehicle (from Latin: vehiculum) is a mobile machine that transports people or cargo. Typical vehicles include wagons, bicycles, motor vehicles (motorcycles, trucks, buses), railed vehicles (trains, trams), watercraft (ships, boats), aircraft and spacecraft. Land vehicles are classified broadly by what is used to apply steering and drive forces against the ground: wheeled, tracked, railed or skied. ISO 3833-1977 is the standard, also internationally used in legislation, for road vehicles types, terms and definitions.