Can someone please confirm that the wiring on this drawing of an ignition switch is correct for a 52 Ford Customline .
Referencing my shop manual, that is correct. Replacement switches are labeled BAT, ACC, ST, and IGN. To verify the connections, you can use an ohm meter. You should have continuity between AM and COIL when the key is on, Between AM and ACC when key is in acc position, and between AM and ST when holding the key in the start mode.