What is the correct test for determining a faulty cable on a direct spark ignition system?

To determine a faulty cable on a direct spark ignition system, conducting a continuity check is the correct approach. A continuity check involves using a multimeter to confirm that electrical current can flow through the cable without interruption. If the cable is intact, the multimeter will indicate continuity, showing that there's a complete circuit. However, if there is a break or fault in the cable, the multimeter will indicate no continuity, highlighting the issue.

This method is essential because it directly assesses the cable's ability to conduct electricity, which is crucial for the ignition system to function properly. If the cable is faulty, it could prevent the ignition system from receiving the necessary energy, leading to a failure in the ignition process. Other testing methods, while important in their own right, do not specifically identify a break in the cable itself. For example, a voltage test measures the voltage present along the cable but does not confirm the integrity of the cable nor indicate whether there is a break. Similarly, a signal test assesses the output signal from the system rather than the cable's condition. Thus, a continuity check is the most appropriate test for diagnosing a faulty cable in this context.