What role does the coil wire play in an ignition system?

The coil wire in an ignition system is responsible for transmitting high voltage from the ignition coil winding to the distributor cap. The distributor cap then distributes the high voltage to the individual spark plug wires, which ultimately deliver the voltage to the spark plugs for ignition. The coil wire acts as a bridge between the coil and the distributor cap, ensuring the efficient transfer of high voltage to the ignition system components.