There are a number of variations '46-48...a '47 could have resistor inside or at coil, and circuit breakers moved from firewall to instrument cluster during '47 as well. Some late '47's might have lost the normal Ford ignition switch, too.
There are variations in headlight hookup but actual circuit is the same.
Published diagrams are available in the Service bulletins and in the '46 service manual, both available in reprint.