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

1952 8N positve ground or negative ground?

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riverbendfarms

05-03-2007 13:35:58
206.45.173.146



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This may just be the dumbest question asked for awhile on theis forum but should i have the negative battery cable to the starter and the positive cable as a ground?
is that what positive ground means?
Sorry for the dumb question but thought i'd ask.




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B.Dozr

07-28-2007 17:19:30
131.230.40.77



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 Re: 1952 8N positve ground or negative ground? in reply to riverbendfarms, 05-03-2007 13:35:58  
My 1952 8n Ford was converted to 12volt before I purchased it. The negative wire goes to the starter and the positive wire is grounded. Does that mean my tractor is positive ground? Also, am I able to switch the cables around, so that it is negative ground. Reason being, I want to put an Electronic Ignition Kit on it and they don"t make one for a 12 volt positive grounded Ford 8n.



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Bruce (VA)

05-03-2007 15:10:04
24.125.26.10



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 Re: 1952 8N positve ground or negative ground? in reply to riverbendfarms, 05-03-2007 13:35:58  
No, the plugs should never be wet. If they are wet, you have flooded it. Turn the engine over for 2 - 3 seconds before you ever use the choke, and then only for a second or two. Each tractor has it's own starting sequence; no choke, light choke, lots of choke....you will figure it out soon enough.



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Dan

05-03-2007 13:53:37
70.2.89.180



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 Re: 1952 8N positve ground or negative ground? in reply to riverbendfarms, 05-03-2007 13:35:58  
Yes, that is exactly what positive ground means. However - note that this is for the STOCK 6V GENERATOR SETUP. If you have been converted to a 12v alternator setup - you need to be negative ground.

Dan



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riverbendfarms

05-03-2007 13:56:44
206.45.173.146



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 Re: 1952 8N positve ground or negative ground? in reply to Dan, 05-03-2007 13:53:37  
Yes it is a stock 6v generator.
but i know i had the battery set up with positive to starter and negative to ground. So would that be why my spark is weak and my tractor wont run?
I have been trying everything and cant figure it out.
Could this be why? It almost starts but cant seem to fire.
spark plugs have spark but its is weak?



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Dan

05-03-2007 14:06:38
70.2.89.180



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 Re: 1952 8N positve ground or negative ground? in reply to riverbendfarms, 05-03-2007 13:56:44  
I am no engineer, but it has been said many times on this forum that while the tractor will indeed run with negative ground on the stock 6v setup - it will do so with 25% less power (for some weird electronic "Law" or something). Swap the positive and negative cables, repolorize the generator, and enjoy a 25% boost of power to your ignition system.

Dan



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riverbendfarms

05-03-2007 14:13:51
206.45.173.146



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 Re: 1952 8N positve ground or negative ground? in reply to Dan, 05-03-2007 14:06:38  
how do i repolarize generator?
is that by toughing 2 connecting 2 scews on voltage regulator using a screwdriver?
which 2 screws is it?
thanks.



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Dan

05-03-2007 14:18:46
70.2.89.180



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 Re: 1952 8N positve ground or negative ground? in reply to riverbendfarms, 05-03-2007 14:13:51  
Shorting the BAT and ARM wires together momentarily. You can do this on the generator end and it is easier (keep them attached to the generator).

Dan



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riverbendfarms

05-03-2007 14:24:52
206.45.173.146



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 Re: 1952 8N positve ground or negative ground? in reply to Dan, 05-03-2007 14:18:46  
BAT is battery cable and ARM is which cable?
sorry for so many questions. its all new for me.
Thansk for your patience.



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soundguy

05-03-2007 21:58:07
12.65.192.132



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 Re: 1952 8N positve ground or negative ground? in reply to riverbendfarms, 05-03-2007 14:24:52  
ARM is the big stud ont he end plate of the generator.

Soundguy



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Colin King

05-03-2007 14:36:40
209.240.88.254



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 Re: 1952 8N positve ground or negative ground? in reply to riverbendfarms, 05-03-2007 14:24:52  
I find it easiest to use a short wire to cross over the BAT and ARM terminals on my voltage regulator. If you look closely, the terminals on the regulator should be labeled. All you need is a little spark to do the trick.

Colin



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Colin King

05-03-2007 13:52:07
209.240.88.254



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 Re: 1952 8N positve ground or negative ground? in reply to riverbendfarms, 05-03-2007 13:35:58  
Yup, you got it!

Make sure you re-polarize your generator before starting. You should do this every time you disconnect the battery.

Colin



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riverbendfarms

05-03-2007 13:55:33
206.45.173.146



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 Re: 1952 8N positve ground or negative ground? in reply to Colin King, 05-03-2007 13:52:07  
So would that be why my spark is weak and my tractor wont run?
I have been trying everything and cant figure it out.
Could this be why? It almost starts but cant seem to fire.
spark plugs have spark but its is weak?



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Colin King

05-03-2007 14:05:58
209.240.88.254



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 Re: 1952 8N positve ground or negative ground? in reply to riverbendfarms, 05-03-2007 13:55:33  
Have you tried jumpering the ignition switch? Those switches seem to often go bad.

Try putting that old coil back in if you still have it. It's not unheard of for coils to be faulty out of the box - and maybe there was nothing wrong with the old coil in the first place.

Check your points, your firing order, charge your battery, and check your compression like Soundguy suggested earlier.

Let us know how you make out with these steps.

Colin, MN

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Phil (NJ,AZ,Sask)

05-03-2007 16:12:38
142.165.28.77



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 Re: 1952 8N positve ground or negative ground? in reply to Colin King, 05-03-2007 14:05:58  
Just to add to Colin,
The small Wire between the coil term and the side of the distributor has a bad Habit of shorting to the Distributor case. The isolation grommet on the through connector fails.

You will see a steady, not flickering, ~4 amp discharge reading on your ammeter during starter engagement/Cranking if you have this short.

Wiggling the wire may clear the short but then you need some silcone or a new Grommet

Hope this Helps

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riverbendfarms

05-03-2007 14:12:00
206.45.173.146



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 Re: 1952 8N positve ground or negative ground? in reply to Colin King, 05-03-2007 14:05:58  
hi.
yes i tried the old coil back in aswell as new plugs.
firing order should be right as it was never touched and ran ok last summer.
My plugs are always dry even after trying to start. Should they not be wet with gas?
I guess first i'll switch the battery around and try from there. I will also change points tonight.
I'll keep you posted.
Thanks for taking timeto help me. Much appreciated

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Hobo,NC

05-03-2007 19:23:01
71.30.107.78



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 Re: 1952 8N positve ground or negative ground? in reply to riverbendfarms, 05-03-2007 14:12:00  
I have seen'em run for years wif neg ground. One think that izz common on'em izz when the coil starts to fail to the point it will hardly run you kin switch it back to pos ground and it will run well. Then it just a matter of time the coil findley pukes and will not run on pos ground. Switch back to pos ground and put a new coil on it. It may not polarize EZ and you may have to try the polarizing deal with it run'n. Its a fact the coil will out put enuff to keep'er going at 75% so operating on a neg ground you got 75% om a good coil. so the coil starts to fail and it will barly run. Switch back to pos ground and you git the 75% factor till the coil findley gives up and its back to were it wuz at on the neg ground with a coil thats probably at around 50%. The crazy thing I have seen when this happens izz the spark will B blue but will not jump a large gap as it should. its possible to have blue spark but still weak. The test izz will it jump a large gap and snap crackle pop.

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