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Featured Ford 9n grounding

Discussion in 'Repair & Technical Discussion' started by voncalvin, Oct 7, 2017.

  1. voncalvin

    voncalvin New Member

    2
    Oct 7, 2017
    I have a Ford 9N which has been converted to 12 volts and has an altenator. It has no battery and both cables are red. How can I safely determine if it is still positive ground or been converted to negative ground.
     
  2. Fedup

    Fedup Registered User

    427
    Feb 25, 2014
    On top post batteries the positive post is slightly larger than the negative. Cable ends/terminals are also made to reflect this size difference. For example, a positive cable end will be sloppy loose on the negative battery post and may not actually tighten up without extra effort while the negative end will be hard to fit onto the positive post. Try your present cable ends ONE AT A TIME on your new battery and see which one fits which post better. Then make sure the negative battery post is the one now connected to ground.
     
    sixbales likes this.

  3. voncalvin

    voncalvin New Member

    2
    Oct 7, 2017
    Thanks, helps a lot.
     
  4. willys55

    willys55 Caractacus Potts Staff Member Supporting Member

    Oct 13, 2016
    12 volt systems are always negative ground, positive ground for 6 volt
     
    sixbales likes this.