How do you check an ignition switch?

To check an ignition switch, first, ensure the vehicle is in the "off" position and disconnect the battery to prevent any electrical issues. Use a multimeter to test the continuity by connecting the probes to the switch terminals and turning the key to different positions; there should be continuity in the "on" and "start" positions. If there is no continuity in these positions, the ignition switch may be faulty and should be replaced. Always refer to your vehicle's service manual for specific procedures and pin configurations.