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Ford 9N, 2N & 8N Discussion Forum
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No power to starter?

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kylearzonca

11-14-2017 10:37:43




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Hello ladies and gents, first post. I have been searching for many days now, to no success. I just bought a 1947 8N for a bargain. It has been converted to a 12v system.

The push button has been disconnected and is supposed to start off the key.

The starter solenoid is the non-OEM 4 post solenoid. I get power all the way to the coil and ignition switch, solenoid has power going in to it. Power all the way to the Voltmeter. If i jump the battery cable to the starter cable, it will spin it.

I changed the solenoid out, but same thing is happening.

Replaced dingy wires, cleaned up grounding spots, but nothing. If someone happens to know what to check for or how it is supposed to be wired would be greatly appreciated.

Thanks, kyle.

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JMOR

11-15-2017 14:07:28




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
Quoting Removed, click Modern View to seeGreat!



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kylearzonca

11-15-2017 11:53:15




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
I switched the wires around and now it'll stop cranking when i let the key go.

Just took the carb off since it leaks and took the jets out and split it in half, now it's soaking in degreaser along with the sediment bowl which haf no screen on it. Just ordered the gaskets for them and the screen. Hopefully they should be the last things i need to do to get her running.



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DON TX

11-14-2017 22:24:14




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
I was working on a old fergy that had that ignition setup like that. I found myself in front of the rear tire with that thing started and trying to run over me. Lucky it was at idle and it was in front of an immovable object. It had me wrapped up in the tire and moving forward for a foot or two. I got it turned off but really shaken. It happens so fast. Think about it.

HTH
DON TX



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kylearzonca

11-14-2017 20:11:12




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
I was thinking that, I'll hop to on that after my lovely day at the VA and let yall know.



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JMOR

11-14-2017 20:09:04




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
Quoting Removed, click Modern View to seedo you have wires on both the small posts? If yes, try reversing the two.



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R Geiger

11-14-2017 18:21:22




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
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Correct. Ballast resistors change resistance when they get hot. fixed resistors like yours do not. You only use the ballast resistors on tractors with a front mount distributors. later 8ns side mount distributors, only use a terminal strip at that location.



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Arvin Haslem

11-14-2017 18:00:01




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
I bought an 8N that wouldn't crank over. It had a 4 post automotive style solenoid on it. The solenoid was installed backwards, starter side to battery and battery side to starter. I turned it around and hooked it back up. Make sure you get the small wire on the correct post. "S" if I remember correctly. DO WHAT EVER YOU HAVE TO DO TO FIX THE NEUTRAL START SWITCH BEFORE YOU PUT THE TRACTOR IN SERVICE. I started my Dad's Ferguson when I was 4 years old. Good thing it wouldn't start in gear. I also started a JD 45 combine when I was 3. It was in gear. Dad wasn't home at the time. Mom had to run from the house, climb the steps and figure out how to shut it down before I hit the big cottonwood I was headed for. After that Dad always took the key out. That was the beginning and end of my combine operating career.

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kylearzonca

11-14-2017 16:22:16




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
I tried hooking up the i post to a power source, but once i crank it, it won't stop. I have to remove the battery ground or electricity.



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JMOR

11-14-2017 15:00:22




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
Quoting Removed, click Modern View to seethere is more than one type of four post solenoid. I might try jumpering from battery directly to one small terminal and then try the other small terminal.



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kylearzonca

11-14-2017 14:50:38




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
The OEM ballast resistor, that would be the resistor block in the schematics that he posted correct? Just making sure so I'm not messing anything up



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R Geiger

11-14-2017 14:36:15




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
I would get rid of the resistor in your photo and get an OEM ballast resistor, but may need it in wire going to coil if the coil is a 6 volt coil. even if the coil is a 12 volt one you still need the Oem BALLAST RESISTOR.



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R Geiger

11-14-2017 14:30:59




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
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I tested it with my multimeter, im getting 0.6 ohms. What number should i be seeing. Or is this minimal amount sufficient. Used the battery as the ground and then the tab with the whole in it on the PB start switch.[/quote]

The push button switch terminal to ground should be zero resistance, direct short to ground. Key switch i would replace with one with two terminals two position on and off to keep things simple. wire like JMOR's diagram, all will be well.

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kylearzonca

11-14-2017 13:46:27




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
The photos attached is how my wiring is set up. its a 4 post key solenoid with most of the wires ran to it.





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kylearzonca

11-14-2017 13:05:19




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
I do believe it will be more complicated then that. Not only is it a different solenoid, but the key switch has been swapped out for a 4 post key switch as well.



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kylearzonca

11-14-2017 13:03:15




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
It would be real simple to go back to the safety button switch, if the switch is good. I would test the push button switch first off. All it does is provide a ground ,so with a Ohm meter, check to see it is works.
all you would need is a Oem 3 terminal SOLENOID and a wire running from small terminal to push botton.

google for 8n wiring diagram.

good luck[/quote]

I tested it with my multimeter, im getting 0.6 ohms. What number should i be seeing. Or is this minimal amount sufficient. Used the battery as the ground and then the tab with the whole in it on the PB start switch.

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JMOR

11-14-2017 12:43:55




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
As RG said, be sure you get the OEM type solenoid which activates by grounding the one small terminal.



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R Geiger

11-14-2017 12:26:18




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
Quoting Removed, click Modern View to see

It would be real simple to go back to the safety button switch, if the switch is good. I would test the push button switch first off. All it does is provide a ground ,so with a Ohm meter, check to see it is works.
all you would need is a Oem 3 terminal SOLENOID and a wire running from small terminal to push botton.

google for 8n wiring diagram.

good luck

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kylearzonca

11-14-2017 11:26:53




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
I agree, i do need to put the push button start back on because of the safety switch, not sure how much wiring that would entail.

However, it is a 4-spd trans, i looked up the serial number on the block an it said it was a 47 8n so thats what i went with.

Thanks for the heads up though!

~kyle



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flembo

11-14-2017 11:12:13




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 Re: No power to starter? in reply to kylearzonca, 11-14-2017 10:37:43  
First off folks here are going to get after you to put the safety switch back in operation. Second you either have a 47 2n or a 48 8n I have a 48 8n that was built in the fall of 47 but it is a 48 8n. A 3 sp. trany would be a 2n and 4 sp. would be 8n. hth. Others will chime in on the wiring.



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