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Re: 8N 12 volt wiring problems

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Bruce (VA)

01-02-2014 13:58:07

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" Also, do I even need the voltage reducing resistor?"


Does the tractor have a front or side distributor?

What does the resistor look like?

Got a model/make of the alternator?

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01-02-2014 14:48:27

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 Re: 8N 12 volt wiring problems in reply to Bruce (VA), 01-02-2014 13:58:07  
So, should I wire this as a single wire alternator??

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01-02-2014 14:34:41

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 Re: 8N 12 volt wiring problems in reply to Bruce (VA), 01-02-2014 13:58:07  

It is a front mount distributor.
It is a Delco-Remy alternator. I couldn't find any numbers on it, but post at rear says BAT.

I'm not positive of year of tractor...either a 1947 or 1948. Serial # is hard to read, real faint stamping, but it looks like 8NF1129????

The pic is what the new resistor I put on looks like. I will also try to post a pic of what I assume was a resistor that I took off. It would get cherry red hot and tractor would die. I would wait about 10 minutes for resistor to cool off and tractor would run for a while until it got cherry red hot again and die.

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Bruce (VA)

01-02-2014 14:50:02

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 Re: 8N 12 volt wiring problems in reply to wasilla1, 01-02-2014 14:34:41  

See tip # 30 at the link; get rid of that resistor. Get the OEM ballast resistor (as in the picture) and a 12 volt coil.

Re the rest of the wiring, Google "wiring diagrams JMOR" and pick the one that fits your alternator.

Post back w/ results or more questions.

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01-02-2014 14:58:36

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 Re: 8N 12 volt wiring problems in reply to Bruce (VA), 01-02-2014 14:50:02  
I put that one on. New block and resistor. It's in the top right center of my drawing on the original post. Internet research led me to believe I needed an additional one which is the voltage reducing resistor on the top left of my drawing.


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01-02-2014 16:17:48

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 Re: 8N 12 volt wiring problems in reply to wasilla1, 01-02-2014 14:58:36  
I'm far from an expert on this,but I did rewire my 8N. It looks to be wired right from your drawing. Try shorting the wire to starter button to a good ground if it starts your button is bad. If this doesn't work you could have the wrong solenoid.

Looks like Jcinky answered better than me while I was typing.
This post was edited by carlntexas at 16:24:16 01/02/14.

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01-02-2014 18:04:45

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 Re: 8N 12 volt wiring problems in reply to carlntexas, 01-02-2014 16:17:48  
Thanks. I'll try that tomorrow.

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arnold z

01-02-2014 14:19:10

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 Re: 8N 12 volt wiring problems in reply to Bruce (VA), 01-02-2014 13:58:07  
Quoting Removed, click Modern View to see

A lot of assuming on my part :) Better question is it for sure a 8N? I've bought a few Ns that had some wierd combos of resistors and coils that worked, and some that should have that didn't. The coils are pretty inconsistent nowdays.

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