Field wire from generator to light switch

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
Posts: 23107
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: Field wire from generator to light switch

Postby John *.?-!.* cub owner » Sun Aug 12, 2018 1:16 pm

The only difference from the wiring diagrams you have been given, assuming the magneto is still original rather than having an external coil, you would not use the shown ignition switch and coil wiring. The magneto is stopped by grounding, and uses a single wire system from the magneto to the switch, and the switch grounds the wire when it is pushed in. Out of curiosity I would like to see a picture of how your regulator is mounted, I did not think there was enough room to mount a regulator on the side with a magneto.
If you are not part of the solution,
you are part of the problem!!!

User avatar
5+ Years
5+ Years
Posts: 3118
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Field wire from generator to light switch

Postby Glen » Sun Aug 12, 2018 5:04 pm

Below are pages from the 1955 Cub owner's manual showing wiring, the voltage regulator, Battery Ignition unit, and magneto.
It shows in the lower right pic on the 1st page that IH used the magneto and voltage regulator.
Or the Battery Ignition unit and voltage regulator.
The numbers on the 1st page are explained on the 2nd page. There is a pic of under the hood on the 2nd page. ... e%2049.jpg ... e%2050.jpg

The 1952 Cub owner's manual shows these pics too, it is at Quick links above, it won't let me post it here.

ctltmp, IH offered the equipment it sounds like you have, but after mid 1950, starting at serial number 115403,
You could compare your wiring to the wiring in the manual above, it is the same as the diagram I posted before, I think, except for the ignition switch, like John said above. There is a pic of the switch wiring in the dash pic with magneto on page 1 above.

Do not connect battery power to the small post on the side of the magneto, if it still has the original type coil inside the magneto.
Below are pics of an original type magneto ignition switch, from TM Tractor. It has one post for a wire.
They have new switches there if you need one. ... ng_001.htm

John, below is a manual for the electrical package IH offered in 1951, to put an electrical system on Cubs without it. This was after the voltage regulator came out, and it shows the regulator being used with the magneto. A diagram is on page 10. ... index.html

User avatar
Cub Star!
Cub Star!
Posts: 229
Joined: Thu Jul 14, 2016 6:39 am
Zip Code: 26047
Tractors Owned: 1949 F Cub
Location: New Cumberland, WV

Re: Field wire from generator to light switch

Postby ctltmp » Wed Aug 15, 2018 7:07 pm

WV Mike

  • Similar Topics
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: Don McCombs, Glen and 5 guests