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Subject: 1940 Ford 9N starter switch ????

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Serge    Posted 03-14-2018 at 18:44:36 [URL] [DELETE]        [Reply] [Email]  
  • 1940 Ford 9N starter switch ????
  • Hi to all my friends

    still not able to find my problem I did get two new switch
    I did remove it from the tractor and every time I try the new switch I can ear a small click and than no more if I connect by passing the switch it turn the starter

    so let say if I join the 2 cables on one side of the switch and tuch the negative at the battery it does make the starter turning the engine
    so by passing the switch work???

    could it be possible that both switch would be defective or just not made for a 12 volts
    this is the switch (Atlantic 1100-0975)

    still have another problem and maybe both could be related together
    if bypassing the switch the engine turn trying to start but as soon the engine start and I remove the negative cable to stop the starter from turning it stop immediately??? the same way when you turn your key off

    Tim Daley(MI)    Posted 03-16-2018 at 05:01:52 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 1940 Ford 9N starter switch ????
  • Not sure what model you have -is it a 2N??? but, if when the starter button on the shift cover is depressed, and nothing happens or only a click, it might be a poor/dead battery. Have you had the battery serviced? I don't mean simply slapping the charger on it, but taking it in to a reliable shop so they can test it properly, under load, on the right piece of test equipment. Start there and then look at the Wiring Pictograms by JMOR (see LINK) for your config and begin tracing the wiring from it. Use the proper gauge battery cables as John stated too. I always suggest when troubleshooting electrical issues to start first with a good battery and tracing the wiring, and, if trouble persists, by taking the lighting system out of the equation too by disconnecting them altogether. Once root cause is determined and problem solved, you can always reconnect them. Hope this helps you...

    Tim Daley(MI)

    Jack - Iowa    Posted 03-16-2018 at 06:10:30 [URL] [DELETE]        [Reply] [Email]  
  • Re: 1940 Ford 9N starter switch ????
  • Tim,

    Glad to see someone else make the same mistake! Look at the Subject line.

    Jack

    Jack - Iowa    Posted 03-15-2018 at 10:25:34 [URL] [DELETE]        [Reply] [Email]  
  • Re: 1940 Ford 9N starter switch ????
  • Not understanding you completely.

    Are you saying you removed the cable from the battery and then tied them together and touched the battery post again? If so, you would be depending on your generator to supply the voltage to the ignition. That probably will not happen at idle.

    The other question. Do you have your ignition switch ON?

    Jack

    Jack - Iowa    Posted 03-15-2018 at 10:10:20 [URL] [DELETE]        [Reply] [Email]  
  • Re: 1940 Ford 9N starter switch ????
  • Serge,

    That is a mechanical switch so the only electrical components to worry about are the contacts.

    They are designed to carry the current of a 6 volt system.

    Since a 12 volt starter pulls about half the current of a 6 volt system the switch should work fine.

    The exception to this would be if you are still using the 6 volt starter. Then the current flow would be considerable higher and might exceed the ratings of the switch.

    However my 860 has been converted to 12 volts and the starter solenoid has never given trouble.

    How does you tractor start. Easy or do you have to grind on the starter? Grinding would be hard on the starter switch also.

    Good Luck,

    Jack

    John in Mich    Posted 03-14-2018 at 20:10:35 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 1940 Ford 9N starter switch ????
  • If you get a click with the start button, it suggests that you are completing the starter circuit but have too much resistance to to get the 6 volts to the starter.
    What size are your battery cables? They should be as big around as your thumb. If they are the size of your little finger, that might be part of your problem.
    Clean contacts everywhere are important. The starter case must have a good ground to the engine block.

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