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Ford 9N, 2N & 8N Discussion Forum
Show Parts for Model:

Diagram for 12 volt alternator single wire for 8N

Author 
TJZ

05-01-2007 11:00:44
68.63.105.27



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Hi Guys
Need help with my wiring on the old 8N.
It came with a conversion to a single wire to the alternator but it is not charging. I"m a nuby
to the program and when I started tracing wires I found a nightmaire. There are cut wires every where. It looks like who ever did this just cut the old origional wires and left them there.
I had the alternator checked and it is working.
(It is a Delco-Ramy AZ # 2g20 12VB neg)
I found the resistor
All the wires are corroded.
The tractor starts up immediately without any problems except the battery slowly goes dead.
The ammeter doesn"t move at all.
The battery will hold a charge.
There is a cut wire comming off the top of the distributor.
The 8N is a mid 47/48 (I think by the engine number: 8N130409) Hard to read.
I think I have copied every thing you folks have written, but no diagram on single wire conversion. I better let you know I am a retired therapist and have limited knowledge about DC. If it were AC I wouldn"t have any trouble.
I appreciate any help you can give me.
Tom Z

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TJZ

05-02-2007 21:38:38
68.63.105.27



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 Re: Diagram for 12 volt alternator single wire for in reply to TJZ, 05-01-2007 11:00:44  
Say SouNdguy!!
Thankss for the help. I don't mean to appear stupid, but I don't understand if the diagram is the same set up as with a one wire alternator?
I'm new at this. I you say to use the diagram to trace the wires for the alternator and that it is the same type of set up. No problem.
Gut when I look into this thing I see wires cut in several places at both ends of the tractor.
What do you think?
TJZ

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TJZ

05-01-2007 20:49:20
68.63.105.27



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 Re: Diagram for 12 volt alternator single wire for in reply to TJZ, 05-01-2007 11:00:44  
Appreciate you response.
I don't have any kind of diagram for the single wire alternator.
The electrical tester said he could fix me up with a smaller pulley in order to get higher revs on the alternator. This sounds like a reaonable possible fix but with all the loose wires and the ones that don't go any where I am kind of lost.



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souNdguy

05-02-2007 05:39:07
12.64.72.147



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 Re: Diagram for 12 volt alternator single wire for in reply to TJZ, 05-01-2007 20:49:20  
I said use your OEM wire diagram!!! Not for the darn 1 wire alt.. but for your tractor!!!!! It's in your manual!!!!!

Soundguy



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souNdguy

05-01-2007 12:33:27
12.64.140.210



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 Re: Diagram for 12 volt alternator single wire for in reply to TJZ, 05-01-2007 11:00:44  
Use your OEM wire diagram. Hook the single wire from the alt to the same location as the 'bat' wire from the old regulator.

You will need to add an 8ne10306 or similar dropping resistor, after the OEM ballast resistor in order to use the oem 6v square coil.

If the alt tested good.. but you get dead batteries.. either the charge wire ain't hooke dup.. or you aren't running it up to a high enough rpm to get it to self excite.

That's why i like the 3 wire alternators.. they excite at a nice low rpm.. like 400 or so..

Soundguy

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Ramrod

05-01-2007 12:02:36
216.61.113.33



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 Re: Diagram for 12 volt alternator single wire for in reply to TJZ, 05-01-2007 11:00:44  
These single wire alternators are simple with one catch. You hook the wire to the battery positive and make sure the alternator case is grounded, then you need to rev the engine up to get it to come online (that's the catch). Your voltmeter should show you charge voltage of 13.8 v nominal with good revs of about 800 to 1000. Ensure that the battery cables are good too.



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CHRISMF35

05-02-2007 11:10:07
69.44.236.100



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 Re: Diagram for 12 volt alternator single wire for in reply to Ramrod, 05-01-2007 12:02:36  
WHAT'S THE BEST WAY TO GROUND THE ALTERNATOR CASE?



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Sam#3

05-02-2007 15:26:47
74.193.76.144



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 Re: Diagram for 12 volt alternator single wire for in reply to CHRISMF35, 05-02-2007 11:10:07  
With a mounting bolt. That ground they"re all talking about is the frame, not dirt.



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CHRISMF35

05-02-2007 11:09:50
69.44.236.100



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 Re: Diagram for 12 volt alternator single wire for in reply to Ramrod, 05-01-2007 12:02:36  
WHAT'S THE BEST WAY TO GROUND THE ALTERNATOR CASE?



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CHRISMF35

05-02-2007 11:09:30
69.44.236.100



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 Re: Diagram for 12 volt alternator single wire for in reply to Ramrod, 05-01-2007 12:02:36  
WHAT'S THE BEST WAY TO GROUND THE ALTERNATOR CASE?



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