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Subject: 8N not charging

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Travis Webb    Posted 07-02-2026 at 14:37:46 [URL] [DELETE]        [Reply] [Email]  
  • 8N not charging
  • Hey everyone, '51 8N with side mount dist and 2-brush 3-wire generator. I just put new brushes in the generator, and it motors fine, and I polarized it (probably wrong: first jumped bat/fld, then jumped bat/gen), but isn't charging the battery. I think it's a bad regulator. I followed all the tests here in the attached link, but that didn't help/change anything. The meter reading didn't move at all during any of the tests. Bad regulator?

    Ed Gooding (VA)    Posted 07-02-2026 at 15:00:56 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N not charging
  • If you jumped the BAT to the FLD connector, you fried the voltage regulator.

    BAT to GEN is the jump to polarize the charging system.

    Travis Webb    Posted 07-02-2026 at 15:39:22 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N not charging
  • Thanks. Should I get Echlin from NAPA, or Brillman? Also, what is the correct polarizing procedure?

    Ed Gooding (VA)    Posted 07-02-2026 at 16:29:18 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N not charging
  • I would get mine here.

    That said, my local Napa stocks parts for my '52, and I've gotten tune-up parts and more and been happy with them.

    To polarize - look at the last page of the document that you referenced in your initial post. It has a diagram and instructions there. You will touch a jumper wire (screwdriver, etc.) briefly (just until you get the first spark) between the BAT and GEN connectors on the regulator.

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