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12 volt Alternator--P1 P2 hooked Together

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Jim/41_9N

11-16-2001 09:41:53




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I am working on getting my 54 NAA going this weekend. Bought it not running, it had recently been converted to 12 volts. Most wires were disconnected when I got it. I spent a lot time searching the archives (WoW! a lot of 12 volt info), and believe I have an understanding of what I need to do to get the 12 volt conversion wired correctly. The only thing that doesn't make sense is that the previous owner had the P1 & P2 terminals on the Alternator hooked together, going to the ACC pole on a switch. As I understand P2 should be connected to the BAT pole on the Alternator, and the P1 should go to a side marker or diode (or ACC switch in my case). What kind of problem may have occurred with P1 & P2 hooked together?

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thats because . . . Dell (WA)

11-16-2001 10:34:28




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 Re: 12 volt Alternator--P1 P2 hooked Together in reply to Jim/41_9N, 11-16-2001 09:41:53  
the previous owner knew diddly-squat about 12 volt conversions.

I want to praise you for doing your homework and researching the 12 volt conversion in the archives.

I assume your ACC connection really disconnects the alternators P1 from feeding back voltage from inside the alternator to the ignition coil. I know of at least 5 ways to solve that problem so that you can turn off the engine when you want to.

You may be lucky and findout that the alternator is bulletproof, but I wouldn't bet the farm on it. I'd take the alternator into a shop and have it tested. That way, you'll know if'n it's a good'un..... ..Dell

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