These switches are common failures, but tilt columns also suffer from binding in the column and the gear that the ignition switch turns. Attached below is my YouTube video on changing the turn signal switch, but it also shows how to remove the ignition assembly and how to take the steering column apart. With it apart you can inspect all the moving parts, lubricate the gear and ignition switch housing. Follow all my videos on repairs done to this 1991 F250 4x4 7.3l IDI on my channel @Caddyman and look for the dedicated Playlist to this vehicle.[br]
https://youtu.be/ZKlkU0iOrw0?si=syoYhr_KtiTiyBhj