How can you diagnose a faulty ignition switch?

Diagnosing a faulty ignition switch involves a systematic approach to electricity flow within the ignition system. The correct choice emphasizes the importance of testing for power at the ignition switch itself and ensuring that there is continuity in the circuit outputs when the switch is in various positions.

When the key is turned, the ignition switch should enable power to flow to different components, such as the ignition coil and fuel pump. By checking for power at the switch, you can confirm whether the switch is receiving voltage from the battery. Then, testing the continuity of the circuit outputs while manipulating the key through different positions (off, accessory, run, and start) will reveal whether the switch is functioning properly. If there is no power or continuity in the expected positions, it is highly indicative that the ignition switch is faulty.

This methodical approach provides clear and actionable diagnostic information about the switch's operation and is essential for accurately determining its condition. Other options may not directly address the operational testing necessary to confirm a faulty ignition switch.