In Reply to: 9N coil posted by Les Leach on April 26, 2018 at 15:14:31:
The original ballast resistor looks like this, and can be purchased new at Just8Ns.com - see LINK below. Picture shows Steve Dabrowski's early 8N in restoration mode from a few years ago. On the RH side, viewed from behind the dash, you can see the OEM ballast resistor mounted. If you don't already have the essential manuals for your 9N, many of us N-Owners here suggest you invest in them as well. They are as much a vital tool as any wrench is. The 4/5 manuals on the LH side are the important ones: I&T F-04 Manuals; 9N Owner Manuals; 2N Owner manuals; and the '39-'53 MPC (Master Parts Catalog). Although you now have a 12-volt changeover, it is important to know what the original 6-volt system is like. Having the correct wiring is very important in either situation.
1948 FORD 8N WIRING –DASH PANEL:
FORD 9N/2N TRACTOR OWNER ESSENTIAL OWNERS MANUALS: