What is the effect of a faulty ignition switch on starter operation?

A faulty ignition switch can lead to intermittent cranking problems due to its role in establishing the necessary electrical connection between the vehicle's battery and the starter circuit. When the ignition switch is failing, it may not provide a consistent or reliable flow of electricity, which means that the starter may receive power at some times and not at others. This inconsistency can result in situations where the starter will crank intermittently, turning over the engine at times but failing to do so at others, which aligns with the nature of intermittent faults.

In contrast, a completely malfunctioning ignition switch could result in an inability to crank altogether, which would lead to the scenario described in another choice. Alternatively, if the ignition switch allows too much current to flow, it may cause the starter to crank too fast. However, the most typical symptom of a failing ignition switch is the irregular functioning of the starter, leading to intermittent cranking issues.