In the ignition system, what is the function of an ignition lead?

In the ignition system, what is the function of an ignition lead?

• A. Provide power to igniter
• B. Ground the circuit
• C. Connection from the exciter to the ignitor
• D. Regulate spark duration

Answer: (C)

An ignition lead is the high‑voltage conductor that carries the ignition pulse from the exciter to the ignitor (spark plug). It must be rugged and well insulated to handle the rapid, high‑voltage spikes and to prevent interference, delivering energy reliably to create a spark at the right moment. It doesn’t supply power on its own, and the circuit’s return path is through the engine grounding when the spark jumps the gap. Spark duration is controlled by the ignition control electronics and timing settings, not by the lead itself. So the lead’s role is to connect the exciter to the ignitor, delivering the pulse that creates the spark.

An ignition lead is the high‑voltage conductor that carries the ignition pulse from the exciter to the ignitor (spark plug). It must be rugged and well insulated to handle the rapid, high‑voltage spikes and to prevent interference, delivering energy reliably to create a spark at the right moment. It doesn’t supply power on its own, and the circuit’s return path is through the engine grounding when the spark jumps the gap. Spark duration is controlled by the ignition control electronics and timing settings, not by the lead itself. So the lead’s role is to connect the exciter to the ignitor, delivering the pulse that creates the spark.