Help with a JMOR wiring diagram for a Jubilee

Walston

Member
Location
Upstate SC
I wired my Jubilee project using a nnalert 12 volt conversion. I used this diagram:
30071.jpg


My starter button does not work. I have to jump from the + battery side to the side of the starter solenoid where he shows the white wire. Then the tractor starts. Going to the negative side does nothing, just like the starter button.

I am assuming that the starter button goes to ground, so any ideas on what I may have wrong?
 
Touch or jumper the wire that hooks onto your start switch to ground. That will tell you the wiring is okay. Some fords the tractor has to be in neutral for the switch to work. When you push the starter button it just goes to ground to complete the circuit for power to flow to your solenoid. On my 8n I have a toggle switch so you cant start it unless that switch is on. Clean terminals is a must on old tractors. Hope this help. norm
 
(quoted from post at 06:27:31 11/15/15) I wired my Jubilee project using a nnalert 12 volt conversion. I used this diagram:
30071.jpg


My starter button does not work. I have to jump from the + battery side to the side of the starter solenoid where he shows the white wire. Then the tractor starts. Going to the negative side does nothing, just like the starter button.

I am assuming that the starter button goes to ground, so any ideas on what I may have wrong?
Swap the wires on the large terminals.

Mark
 
It sounds to me like you have the wrong 3 wire solenoid.
Some for cars/trucks required power to actuate where the
one for tractors used ground to actuate.
Many people use the car type when they convert to key start.
 
(quoted from post at 15:08:11 11/15/15) It sounds to me like you have the wrong 3 wire solenoid.
Some for cars/trucks required power to actuate where the
one for tractors used ground to actuate.
Many people use the car type when they convert to key start.

That is what I was thinking. I got it from Napa and told them it was for a Ford Tractor. However since it takes power instead of ground to activate, I think you are right, it is the wrong one..
 
With the two large terminals wired backwards it is getting ground through the starter and that is why you have to power the small terminal to activate it. If you swap those two so it powers the other side it will then activate by grounding the small terminal.

Mark
 
(quoted from post at 15:36:43 11/15/15) With the two large terminals wired backwards it is getting ground through the starter and that is why you have to power the small terminal to activate it. If you swap those two so it powers the other side it will then activate by grounding the small terminal.

Mark

I will give that a try. Thanks
 
(quoted from post at 10:36:43 11/15/15) With the two large terminals wired backwards it is getting ground through the starter and that is why you have to power the small terminal to activate it. If you swap those two so it powers the other side it will then activate by grounding the small terminal.

Mark
If this is the case, once the solenoid closed wouldn't it drop right back out?
 
Walston........unlike the starter mounted solenoid on the 8N, yer Jubilee starter solenoid is mounted on the firewall. It should still be a 3-terminal solenoid where the solenoid is grounded by the BIG thumb switch by the tranny shifter. Surprizingly enuff, neither the starter motor, nor the solenoid, nor the ignition switch, nor the headlite switch, nor the coil, care whether the battery is positive ground ...or... negative ground ...or... 6-volts ...or... 12-volts. Alternators do care 'cuz you'll let the smoke outta them solid state transistorized stuff. (stuff, technical term) But to answer yer question, you have the 3-terminal starter solenoid mounted UPSIDE DOWN. It shouldn't take an electrical genius to figger how re-mount it 'tuther way around. CAUTION: alternators need an IDIOT lite so they will turn OFF 'cuz the ignition switch won't do it. .......HTH, electrical Dell
 
(quoted from post at 11:49:52 11/15/15)
(quoted from post at 10:36:43 11/15/15) With the two large terminals wired backwards it is getting ground through the starter and that is why you have to power the small terminal to activate it. If you swap those two so it powers the other side it will then activate by grounding the small terminal.

Mark
If this is the case, once the solenoid closed wouldn't it drop right back out?
No, it will continue to get its ground through the starter even while it is spinning.

Mark
 
(quoted from post at 15:58:55 11/15/15)
(quoted from post at 11:49:52 11/15/15)
(quoted from post at 10:36:43 11/15/15) With the two large terminals wired backwards it is getting ground through the starter and that is why you have to power the small terminal to activate it. If you swap those two so it powers the other side it will then activate by grounding the small terminal.

Mark
If this is the case, once the solenoid closed wouldn't it drop right back out?
No, it will continue to get its ground through the starter even while it is spinning.

Mark
Seems to me once it closed you would have zero difference in
potential across the activating winding so it would drop out.
Then once the contacts open it would close again.
Seems like it would chatter that way until you disconnected the small wire.
Still might spin the starter.
I'm not going to go swap my cables to find out though! :)
 
(quoted from post at 15:39:28 11/15/15)
(quoted from post at 15:36:43 11/15/15) With the two large terminals wired backwards it is getting ground through the starter and that is why you have to power the small terminal to activate it. If you swap those two so it powers the other side it will then activate by grounding the small terminal.

Mark

I will give that a try. Thanks

As much as I was hoping all you guys that suggested to swap the terminals on the solenoid were right, it didn't work. Still requires a power source to energize the solenoid to start the tractor. In other words it changed nothing.

I am usually pretty good at wiring and I will double check everything else. The tractor starts and runs fine. This is the only electrical issue I am having. Right now I am leaning towards Royce's thought that I have the wrong type of solenoid.
 
(quoted from post at 17:59:48 11/15/15)
(quoted from post at 15:39:28 11/15/15)
(quoted from post at 15:36:43 11/15/15) With the two large terminals wired backwards it is getting ground through the starter and that is why you have to power the small terminal to activate it. If you swap those two so it powers the other side it will then activate by grounding the small terminal.

Mark

I will give that a try. Thanks

As much as I was hoping all you guys that suggested to swap the terminals on the solenoid were right, it didn't work. Still requires a power source to energize the solenoid to start the tractor. In other words it changed nothing.

I am usually pretty good at wiring and I will double check everything else. The tractor starts and runs fine. This is the only electrical issue I am having. Right now I am leaning towards Royce's thought that I have the wrong type of solenoid.
I agree that you have the wrong solenoid if swapping the wires on the large terminals didn't change anything. Why did you change the solenoid?

Mark
 
"Right now I am leaning towards Royce's thought that I have the wrong type of solenoid."

OBLIVIOUSLY, you do.

The correct ones were a Dorf oddity, they were pretty much alone against the norm of anybody else in persisting with their oddball solenoid, so it's not real tough to figure out why these things happen.
 

OK Just to close this loop. Once I got the correct Solenoid, every thing works as it is supposed to. Imagine that.....
Tisco Starter Solenoid, NCA11450A is the correct one.

Thanks for all the help.
 
(quoted from post at 13:48:37 11/17/15) Just to satisfy my curiosity, was the one from Napa a 3 post or 4 post?
Glad you got it taken care of and thanks for the follow up.

Mark
3 Post. See attached, it is set up for cars and requires + to energize the solenoid

http://www.napaonline.com/Catalog/CatalogItemDetail.aspx/Starter-Solenoid-Switch/_/R-ECHST95_0460797484
 

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