Wiring help

Trying to get rid of the rats nest of wiring on my 640 that has a 4 pole solenoid on a 12v conversion.
Pulled on something and wasn't paying attention to the results and now I don't know where the wire on the I post of the solenoid came from.
Manual is no know help because of the 12v conversion.

Anyone have a very simplified version of the wiring diagram so I can clean this mess up?

Might ad the original pushbutton started switch has been replaced with a button on the dash.
 
If it has the same 4 pole solenoid as the X01 series Ford then 1 small post goes to a switched 12V source and the other small post goes to the grounding starter button. It doesn't matter which post is hooked to 12V or to ground.
 
Electricity and I are not friends. All I know is if you let the smoke out things don't work anymore.
Anyway, after finding a bad ignition switch and redoing some of the wire ends we're back to the dangling wire.
One wire does go to the switched side of the starter button.
Not quite understanding what you said about the other wire except that it might go to ground.
Here's where I really get lost. Tractor started right up without that post being wired to anything, it's just hanging there.

So what do you think is going on?

 
Well if it starts, runs and shuts off, you're almost there.
What doesn't work now? Headlights maybe?
Is the battery charging?
Can you see where the other end of that wire goes?
 
To be brutally honest- I'm surprised anything electrical works on that tractor. I see rust and corrosion everywhere. If it were mine I'd be replacing all of the cables and wiring.
John in LA has posted numerous wiring diagrams on this forum. Maybe you can search the archives and find them. But the first thing you need to do is determine which solenoid you have- the one for a Ford car or the one for a Ford tractor. They look EXACTLY the same on the outside but they are different internally.
 
No lights of any kind.
Battery is now charging.
No sign of where the wire came from.
Volt meter wasn't working, so that's what prompted me to start replacing the mess.
One reason it looks like it does, is that I washed that area with Zep commercial degreaser yesterday afternoon.

Anyway, still looking for the place the extra wire goes.
 
Ordered a new solenoid off this site today.
It has 4 posts also, so it might be nice to know more about the wire.
Have no idea what this solenoid is. All I know is that the smoke has not been let out.
 
It starts and runs, right? So the solenoid is not the problem.
The 640 originally had a 3 post solenoid, not four.
So it is difficult to tell what a previous owner has done
and finding a standard wiring diagram is all but out.
I'm confident we can help with the wiring, but we're not there
to lay eyes and hands on it, so you'll need to do the work.
Can you trace that wire back and see where the other end goes?

If everything is working correctly, you could probably just tape
that wire up and be fine. Leave it though, in case you later find
something that is not working.
What I would really prefer to see is the tractor put back to original
so the neutral safety switch worked and nobody got run over.
 

Most likely that wire pulled out of a crimp-on terminal. Got any crimp-ons with no wire in them?
 
(quoted from post at 18:10:13 04/28/14) Electricity and I are not friends. All I know is if you let the smoke out things don't work anymore.
Anyway, after finding a bad ignition switch and redoing some of the wire ends we're back to the dangling wire.
One wire does go to the switched side of the starter button.
Not quite understanding what you said about the other wire except that it might go to ground.
Here's where I really get lost. Tractor started right up without that post being wired to anything, it's just hanging there.

So what do you think is going on?

ike someone said, we are not there, so help us out a little.
"One wire does go to the switched side of the starter button." WHICH ONE? COLOR?
"Switched side of starter button". When button activated, does this wire go hot or is it grounded?
"Not quite understanding what you said about the other wire except that it might go to ground."
"Here's where I really get lost. Tractor started right up without that post being wired to anything, it's just hanging there."
Hint: see if other end of wire (color?) that wasn't connected to post is around ign coil.

So what do you think is going on?
 
Cut away more of the tape on all the rest of the old wiring and found two more wires of the same color as the one on the solenoid.

Both went right to frame ground, so I going to assume (this could be trouble) that this is where the wire went to.
Since everything seems to be working I'll go with it, then neatly bundle it all back up and be on my way.
 
What Texas said.
So be sure and get one with an insulated coil, like Napa ST542. Some places are selling replacements for x01 that are not insulated.
 
Actually there's nothing wrong with it.
It's a #2 welding cable that came off my golf cart, and except for the slight green on the the exposed wire where it met up with the battery it's fine.
Dipped it into baking soda water......shazaam, looks like brand new again.

Worry not, all wiring has now been replaced.
Why is the coil being brought into this?
 

I'm sure JonB was referring to the coil of the relay (solenoid) not the ignition coil. The number he gave was for the suggested NAPA relay (solenoid).
 

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