2N ignition

When I finished restoring my '47 2N earlier in 2005 & hooked the ignition switch back up I found that I couldn't turn it off by the key (12VDC)! Of course turning off the fuel gets the job done but a little time consuming.

On one post the wire from the switch goes to the ammetter. On the other post, there are two wires, one goes to the ballast resistor & the other to the alternator. Does this sound correct?

Thanks,

Gary
Baton Rouge

You need a light or diode in the small wire coming from P1 on the alt. It is back feeding your switch keeping it running. Here is a digram with a big thanks to My Old Fords .com

So what I haven't figured out yet is where is the feedback coming from. I confirmed with my VOM that the key switch is making/breaking the connection to the coil. I know it has to be something simple that I'm missing here.

Also, what size or value of diode do I need & where do I hook it up?

Also, the schematic doesn't show the external ballast resistor which my tractor has. It's attached inline on the lead to the coil.

Thanks for your help & input.

Gary Baton Rouge