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Ford 9N, 2N & 8N Discussion Forum
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6 Volt Positive Ground

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Russ Kinch

04-28-2006 09:37:16




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Pardon my ignorance for asking this question, but I have an NAA with a 6 volt battery. As far as I know, this an original electrical system. The negative side of the battery goes to the frame and the positive side goes to the solenoid. The tractor other than its various problems runs in this configuration.

I would consider this a negative ground system, but in this forum I see people saying that this tractor normally has a positive ground setup, which to me implies the positive side should be hooked to the frame.

Is my thinking incorrect?

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Todd8N

04-28-2006 11:19:14




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 Re: 6 Volt Positive Ground in reply to Russ Kinch, 04-28-2006 09:37:16  
OK, now for my question. my 48 8n was converted to 12v with the negative going to the body. I have to use a starter key switch to have a positive charge go to the solinoid to start the system. This means I am bypassing the original starter button.

Can I swap the positive to the body and then make my solinoid work with the starter button and get away from the key switch?



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old

04-28-2006 12:32:31




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 Re: 6 Volt Positive Ground in reply to Todd8N, 04-28-2006 11:19:14  
Nope if it has an alternator then it has to stay the way it is. But you problem is probably that it has the wrong soiliniod on it. The N tractors take a special solinoid and if it doesn't have that type on it theres your problem. Soliniods don't care if its + or - ground



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don t.-9n180179

04-28-2006 11:58:04




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 Re: 6 Volt Positive Ground in reply to Todd8N, 04-28-2006 11:19:14  
The way I understand it, 12 volt alternator requires negative ground. End of my knowledge on this area, sorry.
HTH... don t. ....



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Russ Kinch

04-28-2006 10:49:26




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 Re: 6 Volt Positive Ground in reply to Russ Kinch, 04-28-2006 09:37:16  
How do you polarize the regulator?



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dan hill

04-30-2006 04:48:38




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 Re: 6 Volt Positive Ground in reply to Russ Kinch, 04-28-2006 10:49:26  
dont do this. much like teaching a dog to bark.A regulator is a magnetic device.Putting a dc voltage on the coil attracts a steel arm with points on it.The points close , doesnt matter what polarity the dc voltage is.Relays work with ac voltage fine.When the polarize birds mess with solid state regulators the smoke will roll....



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DaveTx

04-28-2006 12:00:12




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 Re: 6 Volt Positive Ground in reply to Russ Kinch, 04-28-2006 10:49:26  
You polorize by arching the BATT and ARM terminals on the voltage regulator. As a matter of fact I have two wires with a male & female ends tied into the two posts so that whenever I disconnect my battery or have to charge my battery I can just touch the two wires together and polorize the regulator as well as the genny.



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Bruce (VA)

04-28-2006 10:04:26




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 Re: 6 Volt Positive Ground in reply to Russ Kinch, 04-28-2006 09:37:16  
By running it with a negative ground, you are losing about 20% of your spark efficency. Hook it up as a positive ground, polarize it & it should have better performance.



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jci5150

04-28-2006 09:56:14




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 Re: 6 Volt Positive Ground in reply to Russ Kinch, 04-28-2006 09:37:16  
had the same problem with 8n asked old owner he changed batt an didnt know so he put it in backwards didnt hurt anything just turned it around and repolarized genny works fine



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Ramon

04-28-2006 09:40:19




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 Re: 6 Volt Positive Ground in reply to Russ Kinch, 04-28-2006 09:37:16  
The 6 volt Fords (auto & tractor) were all positive ground. It was not until Ford converted to 12 volts that the negative ground system was introduced.



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