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Ford 9N, 2N & 8N Discussion Forum
Order Ford 9N Parts Online

9N Wiring

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LM1970

06-08-2020 18:10:41




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I need help.
I have an IT Shop Manual,I've scoured the internet. But, I can't seem to find , or really trust, what the real wiring for my 9N should be.
It had been altered over the years. It's a 6 Volt.
I got it up and running about 12 years ago. Ran for 2 years. It had sat for 16 years prior to that.
Gotta love those 9N's!! It ran like a top in 2008 to 2010 after I replaced plus, pounts, rotor, condenser, crab cap, and coil. And rebuilt the carb. It started quicker than my car.
Then it just started giving trouble. I let it sit due to life. Now, with new battery, new starter, points condenser, and rotor, and coil. Also a new switch. Barely turns over.
So, I've now put in a new ignition. Old one wasn't even in use. Oh.....
12 years ago.... because of how it was wired then... no ignition, just a wire straight from the Battery Positive, to the Coil. It ran great.

Back to now....
So, I decided to wire it right. With all new wires. Amp gauge is orig. And looks like it still works. Tested Resistor, seems ok. Cleaned them. Now, here's my question.

What is the proper way to wire it?

So many diagrams are different.

Also.... I've seen in some, there is a "Cutout Relay" in the Generator wire. Is that needed?
Some have a New Resistor " in line. Ugh....
I don't want to fry anything nor explode the battery.

I'm attaching a diagram of the one I have decided to go by. Is it right?
There are no lights nor light switch. So I'm ignoring that part.
Thanks in advance for any help.


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HFJ

06-23-2020 18:16:30




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
yes. i've been putting 12 volts to my theoretically 6 volt starter for 10+ years now. the starter will not care :)



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JMOR

06-23-2020 14:44:34




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
If you have decent jumper cables, use them to jump from your vehicle to tractor and see what starter does on 12v. So as to leave tractor cables, connections, switch "as is" as much as possible, remove the cables at the battery and connect jumpers to those cable ends. Leave ignition OFF, so as to avoid placing 12 volts on anything other than starter. 6v battery is totally out of picture. If you wish to be extra cautious, you can remove wire from BATT terminal of cut out, but since a good cut out will be open, it shouldn't matter.

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LM1970

06-23-2020 15:27:42




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 Re: 9N Wiring in reply to JMOR, 06-23-2020 14:44:34  
I'll give this a try, if I can. I tried posting a picture of the starter.
It does say 6 Volt on it. Still ok to try 12 volts on it?



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JMOR

06-23-2020 14:21:06




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Quoting Removed, click Modern View to see1.57 volt drop with starter load is somewhat high (expect ~ 0.5 to 1 volt). This may mean that starter is drawing too much current. Do we know that this is a good starter?



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LM1970

06-23-2020 14:43:33




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 Re: 9N Wiring in reply to JMOR, 06-23-2020 14:21:06  
When I say new. Technically it's brand new. I bought it and put it in, fresh out of the box. It has however, been sitting for a number of years. I have kept it covered to keep as much moisture out as possible. I also sprayed it well with contact cleaner a while back. It engages. But barely turns the engine.



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LM1970

06-23-2020 14:26:13




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 Re: 9N Wiring in reply to JMOR, 06-23-2020 14:21:06  
It is also new. I replaced the old one, because I originally thought it was the problem.



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JMOR

06-22-2020 13:39:35




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Quoting Removed, click Modern View to see"6.37v on one side of the (also new) starter switch." With or without starter engaged?



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LM1970

06-23-2020 13:10:42




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 Re: 9N Wiring in reply to JMOR, 06-22-2020 13:39:35  
The 6.37v is without the button engaged.
It drops to 4.80v or so when the button is pushed.



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LM1970

06-22-2020 13:01:53




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
So......

I had a choice of bringing the Battery that I bought in September last year for a "load test". Or, buying a tester myself.
Or, buying another battery.
I decided to just try another battery.
It is getting the exact...and I mean exact, same result.
The engine groans a 1/4 turn and then stops.
As for voltage....
6.37v at Battery.
6.37v on one side of the (also new) starter switch.
4.51v on the other side of the switch when engaged. And ...
4.51v at the starter.

I'm at a loss.
This used to start better than my car.

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HarryVanderpool

06-10-2020 17:10:48




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Changing to 12V won't help anything.

Once your tractor is squared away and in perfect tune, it will start faster than any engine you have ever owned.

You will push the button and it will pop faster than you can get off the button.

12V won't (can't) do any better than that!

Take your battery and have it load tested.



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JMOR

06-10-2020 13:48:03




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Quoting Removed, click Modern View to seeYou don't drop from 5v to 0.47v due to cable resistance....you have a bad connection somewhere. Just move along the paths with voltmeter & you will find it.



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LM1970

06-10-2020 16:49:09




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 Re: 9N Wiring in reply to JMOR, 06-10-2020 13:48:03  
I left the Battery Cable as it was. Made sure all connections were good. Hat a 6.33v reading on the Pos. Side of starter switch.
Drops to 4.13v when I try to start. Same reading at other side of switch and starter when trying to start. 4.13v or so. Has Zero cranking power.
Gonna charge the Battery and see.

While I'm here..... what would I need at this point to make a 12v conversion?

I know the Coil has to be a 12v coil. I have one.
What else?

My starter has a sticker that says. 6 volt. I've seen one at tractor Supply that says 6 or 12 volt. Are they the same?

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Tim PloughNman Daley

06-10-2020 05:42:36




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
The CLYMER/I&T FO-4 Manual is correct for the 9N/2N & 8N wiring. The OEM ESSENTIAL MANUALS also have the wiring diagrams. YOU need to know which one you have -the 9N/2N electrical setup is different than the 8N. Don't buy any new parts til old are verified to be defective and most major parts can be rebuilt. The 9N (after s/n 12500) and the 2N used a 1-Wire starter motor and NO Solenoid. They also used a 1-Wire/3-Brush 11 AMP B-Circuit Generator WITH the roundcan cutout circuit. The OEM Ballast resistor and Induction "loop" style AMMETER were also in the circuit. Just because you have a 6V battery don't assume it is wired for the OEM 6V/POS GRN system. Get battery tested -a charge doesn't mean it is good. Get the correct wiring diagram and go thru entire system with a VOM/Continuity Meter -NOT a test light. If you have an 8N, then you have a 3-Wire/3 brush (early) or 2-Brush (later) generator, a square Voltage Regulator, and a 3-wire starter motor with a solenoid. OEM Ballast Resistor is used on the early 8N with the front mount distributor. The later 8N with side mount does NOT use the ballast resistor. Search for Wiring Pictograms by JMOR and download a copy. Forget any lights for now -lights were never factory installed, always dealer optional accessories. Get battery tested and replaced if and only when tested bad that it won't hold a charge under load. Lastly, whatever you have, do you have a belt tensioner device on the generator? Correct fan belt tension is needed otherwise you will never charge the battery.

FORD 9N/2N WIRING 6V & 12V:

FORD N-SERIES TRACTOR FRONT MOUNT DISTRIBUTOR 9N-12250 BALLAST RESISTOR:


FORD 8N TRACTOR WIRING DIAGRAMS:




*PICTOGRAMS courtesy of JMOR

FORD 9N/2N TRACTOR ESSENTIAL OWNER/OPERATOR/PARTS/SERVICE MANUALS:

FORD 8N TRACTOR ESSENTIAL OWNER/OPERATOR/PARTS/SERVICE MANUALS:

Tim Daley(MI)

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JMOR

06-09-2020 20:32:13




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Quoting Removed, click Modern View to seePlace a voltmeter from battery post to battery post while running starter and measure that voltage.



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LM1970

06-10-2020 12:24:23




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 Re: 9N Wiring in reply to JMOR, 06-09-2020 20:32:13  
I had checked the voltage at the Starter prior to rewiring it all. It was 1 to 1.5v when button was pushed. Brand new switch. Thought that was the issue last fall. The old one was seriously broken. The Starter side had 5 washers and was still always loose. So, now, the Battery reads 5.33 volts. With multimeter on Battery Terminals... It drops to 5.15 to 5.05 when button is engaged.
Voltage reading at the Starter is now just 0.47v
The New Positive cable may be too long. It was all they had on Friday. Going to get a 24" 4 guage now. Starter and Neg. Cables are 12" and 4 Guage.
Any ideas?

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LM1970

06-09-2020 17:01:18




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
There. Corrected it.
Looks like I'm going to have to charge the battery again. Although, I just got it last year. Stored it inside for the winter. Charged it a couple weeks ago. But.... even now, with all connections cleaned. And new battery cables. It barely groans. Could the "new" starter be the issue?
The ammeter moves ever so slightly when I engage the starter button. Toward the low side. But barely enough to even notice.

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JMOR

06-09-2020 14:11:49




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Not perfectly clear from your video, but I would not connect a battery before carefully examining that ammeter wiring. From what I can see you have a short from ammeter wires to chassis ground! That looks like a "loop style" ammeter with wires connected to mounting screws! If I am correct in observation and you connect it like that , some wires will burn.

A correct loop style:

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LM1970

06-09-2020 15:27:54




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 Re: 9N Wiring in reply to JMOR, 06-09-2020 14:11:49  
Glad I checked in here first.
Thank you. Yes. I was about to make a big mistake.
Going to make it like the picture now.
I don't like diagrams for this reason. Here is how I have it at the moment.
I'll post an after picture when done.
Btw... do I have the ignition right?



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LM1970

06-09-2020 13:36:59




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Since it was taking sooooo long to upload pictures. I recorded a short video. And put it on youtube. Here's the private link.

https://youtu.be/ichO2q2d0r8



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R Geiger

06-09-2020 13:23:49




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Ater you learn what part is what, wire it like the diagram you posted. You are making headway!



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LM1970

06-09-2020 13:43:01




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 Re: 9N Wiring in reply to R Geiger, 06-09-2020 13:23:49  
I see what you mean by learning what part is what. I see now. Thank you!



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JMOR

06-09-2020 13:18:27




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Quoting Removed, click Modern View to seesee the picture that I posted......your picture shows starter switch (NOT a solenoid) and a cut-out



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LM1970

06-09-2020 13:15:24




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Solenoid has 2 wires. Generator has 1. Placard appears to say 9N.




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JMOR

06-09-2020 13:08:44




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Quoting Removed, click Modern View to see

9N/2N start switch and cut-out



8N solenoid:



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LM1970

06-09-2020 13:40:38




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 Re: 9N Wiring in reply to JMOR, 06-09-2020 13:08:44  
Thank you!!! It all makes more sense now! I assumed it was a solenoid. But, there isn't one I guess?



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LM1970

06-09-2020 12:30:38




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Trying to post pics. Having trouble.



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LM1970

06-09-2020 12:19:49




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Ok... 1 picture at a time I guess.
The placard looks like it says 9N 98520



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JMOR

06-09-2020 12:17:02




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Quoting Removed, click Modern View to see

Front or Side



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LM1970

06-09-2020 12:33:39




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 Re: 9N Wiring in reply to JMOR, 06-09-2020 12:17:02  
Front.
For some reason. My pictures aren't uploading.
2 wires on the Solenoid. 1 on Starter. 1 on Generator.
Placard looks like 9N 98520



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R Geiger

06-09-2020 12:16:02




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
You may need to make a few more psots before you are allowed to post photos for some strange reason. All 9n and 2n tractors serial numbers start with 9N. do you have a voltage regulator on the back of the dash in behind the air cleaner?



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LM1970

06-09-2020 11:48:04




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Here are the pictures. I have some of the original wiring. But, well, I'll post those later if I need to.
It looks like the placard says 9N. There's a pic of that too.



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R Geiger

06-09-2020 10:07:14




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
post a photo of your tractor, several would help, but like jim, says it sounds like you do not have 9n at all. how many wires on generator?



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Jim L WA

06-09-2020 09:36:47




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
If you don't have a cutout relay and you have a solenoid, you don't have a 9N tractor, you have an early 8N tractor. That's what's causing your confusion.



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LM1970

06-08-2020 18:56:40




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
What about the Cutout Relay it shows between the Resistor and the Generator. Mine doesn't have it. It's just a straight wire.


I also forgot about 2 wires on the solenoid. That's not on the diagram at all.
Where should those go?



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R Geiger

06-08-2020 18:40:44




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
Go for it, that wiring diagram is what you need. no more no less.



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Bruce(VA)

06-08-2020 18:38:32




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 Re: 9N Wiring in reply to LM1970, 06-08-2020 18:10:41  
the cutout opens when the engine is off to keep the battery from discharging.

the resistor is for your coil, not your battery. You have a 6v system with a front coil. all you need is the oem ballast resistor, per the diagram.

The diagram is fine. Use it. .



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