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12 volt wiring
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8N: Help

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chris

08-15-2001 15:06:50




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OK, I've followed the wiring diagram on nseries and bribeck but I can't figure out where to hook up the "bat wire" from the new alternator and the "P1 wire" from the altenator. I have the three point terminal-block. The wiring diagrams show the original 8N hookup and the new 12 volt hookup but the 12 volt conv. diagram has only two terminals on the terminal block. I have three. Should I be using a side marker lamp? And where do these two wires from the alternator go now that there is no voltage regulator. I'm afraid I will burn up my new alternator if I don't get it right. I need simple instructions. Thanks in advance.

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Claus

08-15-2001 17:16:07




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 Re: 12 volt wiring - 8N: Help in reply to chris, 08-15-2001 15:06:50  
The output of the Alternator goes to the positive side of the ammeter. The P1 terminal goes to the right terminal of the terminal block, there should be an other wire coming from the switch on this terminal. The current limiting device goes in series with the P1 Alternator terminal. You could use a side marker lamp of the proper type or you could use a diode or a 10 ohm 10 watt resistor available from Radio Schlock. The diode would have to be about 5 amps with a PIV (Peak inverse voltage) of 50 volts. The other connector on the alternator jumps to the output terminal. There should be a ballast resistor matched to your coil on the top 2 terminals. Then the left top terminal should go to the coil..... If you have the original 6 volt coil, you will need an additional voltage dropping resistor in series with the ballast.
Happy MOtoring
Claus

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chris

08-15-2001 20:27:30




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 Re: Re: 12 volt wiring - 8N: Help in reply to Claus, 08-15-2001 17:16:07  
Thanks Claus for the information. Well, I tried everything and the tractor now cranks, runs, and shuts off like it should. However, the ammeter is not registering either way and the lights will not come on. I put a 10 ohm 10 watt resistor in series with the P1 line. Now you should know that the parts guys told me to put a ceramic block type resistor in series with the coil even though I have a 12 volt coil. I know you need one for the 6 volt coil but what do you thing about their suggestion of putting the resistor on the 12 V? They said it would save the points. Does that make sense to you? It sure is getting hot and smokey when I turn the ignition switch.

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yep . . . Dell (WA)

08-15-2001 21:11:00




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 Re: Re: Re: 12 volt wiring - 8N: Help in reply to chris, 08-15-2001 20:27:30  
Chuck..... ....all new power resistors "smoke" (its the way they are made) and all power resistors get hot (burnie-burnie) all the time.

Not all parts persons are qualified N-Tractor 12 volt conversion specialists. But even a real 12 volt frontmount ignition coil needs some form of current limitation device to prevent coil meltdown and points burnout. Since the 0.4 ohm 20 watt power resistor is a rare and scarce device and since I don't know what value your white ceramic block resistor is, I can't advise you further.

And the reason your headlights don't come on are two. 1) 12 volts will burn out your 6 volt headlight bulbs. 2) you "miss-wired" your headlight wiring and you still need to change to 12 volt bulbs..... ....Dell

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