8N not charging wired wrong??

[mitchsnap]

Enclosed is a pic of the back of the alternator as I received the tractor. Check it out. Alternator checked out fine at the auto parts store. Seller stated it was charging fine but I cannot see how. Others to chime in would be great. There was a rubber plug installed where the opening is for the spade connectors.

 

[Mike Groom]

Looks like a one wire internally regulated alternator,the wire on the bottom should go to ground.

 

[mitchsnap]

Don't think that would be a good idea as that wire has 12 volts coming from the battery.

 

[JMOR]

(quoted from post at 18:54:28 11/04/18) Don't think that would be a good idea as that wire has 12 volts coming from the battery.

f you want smoke! :twisted:

 

[Den N Ms]

Not the way that alternator is clocked ,white wire is grounded and red wires are positive battery.

 

[duey]

How FAST did you run the engine to check the Alternator? I hear tell that some like to be run fast before they 'kick in'... but, once charging, they perform normally, down to idle.

 

[mitchsnap]

Here’s the note that everybody should know. On both sides of the amp meter there is 12 V. That is with key on or off. According to the diagram that was shown earlier in a previous post all the hot come in on one side and the other side should be grounded. Is it possible the amp meter is bad and affecting the charging system?

(quoted from post at 16:53:09 11/04/18) Not the way that alternator is clocked ,white wire is grounded and red wires are positive battery.

 

[Den N Ms]

Mitchsnap,Both sides of the ammeter posts should have 12 volts and not one post grounded.

 

[Den N Ms]

Mitchsnap,Have you tried opening up the throttle wide open to see if it starts charging?One wire alternators have to be revved up in order for it to start charging.

 

[mitchsnap]

Thanks for all your responses. I found this diagram on this forum according to the diagram one side of the ammeter is hot and the other side goes to Ground. This is where I’m getting confused.

(quoted from post at 17:52:53 11/04/18) Mitchsnap,Both sides of the ammeter posts should have 12 volts and not one post grounded.

 

[HFJ]

(quoted from post at 21:06:35 11/04/18) Thanks for all your responses. I found this diagram on this forum according to the diagram one side of the ammeter is hot and the other side goes to Ground. This is where I’m getting confused.

(quoted from post at 17:52:53 11/04/18) Mitchsnap,Both sides of the ammeter posts should have 12 volts and not one post grounded.

that's a volt meter, not an ammeter.

 

[Den N Ms]

That is the wrong diagram for your setup.

 

[JMOR]

(quoted from post at 21:07:59 11/04/18)

(quoted from post at 21:06:35 11/04/18) Thanks for all your responses. I found this diagram on this forum according to the diagram one side of the ammeter is hot and the other side goes to Ground. This is where I’m getting confused.

(quoted from post at 17:52:53 11/04/18) Mitchsnap,Both sides of the ammeter posts should have 12 volts and not one post grounded.

that's a volt meter, not an ammeter.

bsolutely! No where on that diagram does it say ammeter.????

 

[Tim PloughNman Daley]

Yep, wrong wiring PICTOGRAM -note JUBILEE??? The AMMETER has no polarity anyway. Original Induction (LOOP) Style simply had the wire feeding thru a LOOP on the back end. Induction controlled the reading on gauge. Later aftermarket gauges -the ones sold today -have two screw terminals on back. Again -NO POLARITY. If gauge reads backwards -charging to the negative side, simply reverse the wires on the terminals or feed wire the opposite way thru the loop. By your picture, we can surmise you have a later 8N that had the angle mount distributor. Wiring systems are different than the prior Front Mount Distributor systems. You will need a 12V round coil. The genny and voltage regulator are taken completely out of the circuit. You can get a copy of "WIRING PICTOGRAMS BY JMOR" for FREE download at the other Ford Tractor place, the *N*-*T*-*C* site, under HOW-TO's/ELECTRICAL.

Tim *PloughNman* Daley(MI)

 

[mitchsnap]

I understand you want to protect the disclosure of the other website. However I’m at a dead end here and there is a lot of different wiring diagrams on the Internet. If someone could please just help me find the correct wiring diagram for this 1950 Ford 8n with the 12 V conversion I would greatly appreciate it. Once again thanks for everybody’s help.
I have also brought up the engine RPM and it still does not charge.

(quoted from post at 06:25:09 11/05/18) Yep, wrong wiring PICTOGRAM -note JUBILEE??? The AMMETER has no polarity anyway. Original Induction (LOOP) Style simply had the wire feeding thru a LOOP on the back end. Induction controlled the reading on gauge. Later aftermarket gauges -the ones sold today -have two screw terminals on back. Again -NO POLARITY. If gauge reads backwards -charging to the negative side, simply reverse the wires on the terminals or feed wire the opposite way thru the loop. By your picture, we can surmise you have a later 8N that had the angle mount distributor. Wiring systems are different than the prior Front Mount Distributor systems. You will need a 12V round coil. The genny and voltage regulator are taken completely out of the circuit. You can get a copy of "WIRING PICTOGRAMS BY JMOR" for FREE download at the other Ford Tractor place, the *N*-*T*-*C* site, under HOW-TO's/ELECTRICAL.

Tim *PloughNman* Daley(MI)

 

[deanostoybox]

 

[HFJ]

(reply to post at 10:19:54 11/05/18)

do an image search with your favorite search engine for:

[b:9c2d5bb44a]wiring diagram JMOR 8n[/b:9c2d5bb44a]

select the one that matches the age of your tractor. if it's a front mount, u want the diagram labeled for before serial number 263xxx (if memory serves me right on that number). for a side mount, u want the one labeled for after that number.

 

[HFJ]

:lol: i see i missed deano's post

not the first time i've done that, and i'm guessing it won't be the last, either

 

[mitchsnap]

OK so the problem with the charging system is the alternator need to be excited from the battery terminal to terminal one on top of the alternator. System is charging just fine now.

 

[HFJ]

excellent, mitch. glad to hear it

 

[W_B]

(quoted from post at 02:00:19 11/05/18) Mitchsnap,Have you tried opening up the throttle wide open to see if it starts charging?One wire alternators have to be revved up in order for it to start charging.

Mine didn't, it charged from go.

 

[HFJ]

(quoted from post at 00:59:10 11/06/18)

(quoted from post at 02:00:19 11/05/18) Mitchsnap,Have you tried opening up the throttle wide open to see if it starts charging?One wire alternators have to be revved up in order for it to start charging.

Mine didn't, it charged from go.

same here. i start my N with about 1/3 throttle and my one wire alternator starts charging a split second after it starts running.

 

[Tim PloughNman Daley]

HA!!! No, Mitch, I'm not 'protecting' the other Ford Tractor website. On the contrary, it is the admins here who feel threatened, view it as a competition, and thus disallow anyone from posting the url of the N Tractor site here so it has to be done in code. The whole purpose of these 'clubs' is to share knowledge and help newbies like yourself with issues on these old Ford Tractors. They don't have a problem linking things back here to the YTMAG site. Perhaps some day they will allow it here but I'm not holding my breath.

Tim *PloughNman* Daley(MI)