Fill in the Blanks Automotive Electrical System OverviewOnline version AUR2 - Automotive Electrical System Overview by James King 1 The required for is the fundamental element of the electrical system BUT to generate the to create a spark , the engine must be to drive the Alternator . The Battery and electric Starter Motor provide the initial turn of the and the spark ( coil ) until combustion takes over turning the crankshaft . The main components of the electrical system are ; ( 1 . ) - provides initial to the starter and the ignition coil . ( 2 . ) Motor - electric starter motor the motor to draw the air / fuel mix into the cylinder . ( 3 . ) Coil / Spark Plug - provides the spark to the air / fuel mix . ( 4 . ) - electricity for the ignition coil and the battery .