12 VOLT 9N WIRING

Leaving the charging circuit out, as there are umpteen dozen ways to do it depending on your equipment, etc... focus on the ignition and starting circuits.

Starting is the easiest... probably won't have to do anything, if the starter is currently turning over when you hit the thumb switch.

Ignition is almost as easy, but you will have to know that your coil is or isn't 12v.

For instance.. if it was an oem 6v coil, the way basic wire diagram could be something like this.
+ from bat to ign switch to oem ballast resistor to 12v to 6v dropping resistor, to connection at coil ( the rest is in the distribuitor to ground thru the points. )

Now.. if you have a 12v coil, depending on if it say no resistance, or use external resistance.. you may be able to run it straight with no resistors.. or you might need a current limiter.. say a .5 ohm 10-20 watt resistor which can be easilly made from a 2 pack of radio shack 1 ohm 10 watt ceramic power resistors ( info courtesy of Dell one of the resident N gurus ).
All depends on your hardware.... same as the alternator.... kinda on your own there, unless you can tell us specifically what you got.. personally I like the 3 wire alternators.. that is what my NAA has.. the VR makes it much easier... has a cutout relay built in... charges at idle rpm, no diode or marker/idiot light under the hood.. etc.

good luck

Soundguy

HOW DO YOU KNOW you have a 12 volt frontmount coil? Did you buy it or are you guessing? They're NOT LABELED. Because ONLY the 6 volt coil needs the "infamous ballast resistor" and the white resistor sounds like it could be a 12 to 6 volt converting resistor that is needed to make the OEM 6 volt coil (and ballast resistor) work on 12 volts.

If you really do have a real 12 volt frontmount coil, DO NOT USE the "infamous ballast resistor" with it. DO NOT USE the 12 to 6 volt converting resistor with it. UNDERSTAND?

And since there is NO OFFICIAL WAY to convert a 9N tractor for 12 volt operation, alotta the wiring harnesses look like garbage. (poor electrical professionalizm)

And while I am a 12 volt advocate (for the right reasons), I have NO favorite wiring conversion diagram (do a better search because they are out there) because I know of 8-ways to convert to 12 volts and they all work. (the first time) Some are technically elligant, some are desperation crude, some are like the factory might have done it.

BTW..... when I run into an electrical circuit that I don't understand, I draw a great big PICTORIAL with wires going from this part here to that part there and what color/size the wire is. And if the wire is in a harness, I draw all the other wires parallel with each other that make the harness. Its the way you learn..... ...respectfully, Dell

And while I am a 12 volt advocate (for the right reasons), I have NO favorite wiring conversion diagram (do a better search because they are out there) I did a search and found these pictorials. Study them. CAUTION; The 12 volt conversion IS NOT for the 1-post alternator.

BTW..... when I run into an electrical circuit that I don't understand, I draw a great big PICTORIAL with wires going from this part here (make a circle, square, blob, and name it) to that part there and what color/size the wire is (name the wire function if you know). And if the wire is in a harness, I draw all the other wires parallel with each other that make the harness. Its the way you learn..... ...respectfully, Dell

• some wiring pictorial examples