How to Wire a Six Volt Generator for a 9N Ford Tractor

The Ford 9N was produced from 1939 until 1952. The advent of the 3-point hitch on the 9N -- a hitch design that is still the industry standard today -- makes the 9N an icon, highly sought after by collectors. Though the three point hitch was cutting edge technology at the time, unfortunately, the 9N was produced with a 6-volt electrical system. One problem with the 6-volt system is that the generators rarely last more than 5 years before they must be replaced. Once you have replaced the generator, you must wire it to the voltage regulator.

Wiring from the generator of a 9N runs to the voltage regulator.

Step 1

Remove the negative battery cable from the negative terminal, then remove the positive cable from the positive terminal. 

Step 2

Unscrew the nut from the "F" terminal -- field terminal -- and place the eyelet of the voltage regulator's "F" wire over the terminal and screw the nut back on.  Tighten the bolt with a socket.

Attach the "F" wire to the regulator's "F" terminal. 

Step 3

Un-thread the nut off the "A" terminal -- armature terminal -- and place the eyelet of the "A" regulator wire over the terminal.  Thread the nut back on.

Connect the "A" wire to the regulator. 

Step 4

Rotate the nut off the "G" terminal -- ground terminal -- of the generator, slide the eyelet of the regulator's "G" wire over the terminal and replace the nut.  Tighten the nut and attach the other end of the wire to the regulator.

Step 5

Reattach the positive battery cable to positive battery terminal, then attach the negative cable to the negative terminal.  Clip your jump wire to the "F" terminal and touch the positive terminal on the voltage regulator.

Count to two and remove the jumper wire.  You have polarized the generator.

Things You Will Need

  • Socket set
  • Jump wire

Photo Credits

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