BATTERY(green) Electrical power storage device. IGNITION SWITCH(light blue) Switches power on/off to the starter & distributor. STARTER(gray) Electric motor, turns (spins) the engine. DISTRIBUTOR(red) Ignites the fuel mixture (via spark plugs) and keeps the engine running. ALTERNATOR(dark blue) Begins to generate electrical power. VOLTAGE REGULATOR(pink) Regulates alternator power and charges the battery.