Ford Tractor Alternator wiring Diagram

[Roger Martin]

I can identify my tractor wires but the Alternator is unmarked.
I need a diagram for the E7NN10B376BB

It only shows a W next to one terminal and for me that relates to nothing.
 

[Ultradog MN]

Year and model please.
All the help you need is here but we need the basics.
 

[Roger Martin]

New Alternator E7NN10B376BB

Replacement for Ford 3230, 3430, 3930, 4130, 4639, 4830, 5030, 5610s, 7010s, 7610s, 7810s, and 8010 Tractors

A marked picture would be nice but I just need to know where to put the field, Regulator, and output wires. Ground is obvious.
 

[Roger Martin]

Good luck viewing but here is a product pic.

 

[JMOR]

[Mark K]

That picture shows an internally regulated alternator, there would be no field wire, there should only be B+ battery wire, an ignition wire, and maybe an idiot light wire.

Does your tractor have an external regulator??
 

[Mark K]

Here is a better picture, w would be your idiot light, B+ is your battery wire, and that is all you should need to set that baby off. How many wires do you have??

 

[Mark K]

The orange wire push on connector will be a b+ battery sense, but it goes through a thermistor on the tractor somewhere, not sure exactly why they are doing it that way, it must boost or backoff charging rate depending on temperature. MK
 

[Mark K]

The 3 spade push in terminal in the center is for European applications only and would have a large black plug, they are basically the same as the other terminals I mentioned, but they can be ignored on US applications, some manufacturers put a cover over these.
They are covering a lot of applications with one alternator, no wonder we call Lucas "the prince of darkness" :~)
MK
 

[Roger Martin]

The Tractor is a Ford 545C
This is not the Alternator that was on it
but it is supposed to replace the D5NN10300D
that has 4 wires including:
Field, Ground, Regulator, and Output

The Output connects to the same starter terminal as the Battery Positive cable
 

[Mark K]

It could go in place of it, but it would need to be wired differently. Your D5NN10300D is an externally regulated alternator, the one you are replacing it with is an internally regulated unit, so if you are going to use it, you will have to do some wiring.

You could use your B+ wire from the starter as is, but your old "field wire" and "regulator wire" from the regulator will not and will need to be covered, then you will need an idiot light wire for the W terminal, and as for the "sense" wire, I'm not sure if it will run right without it. You are going to end up with a mess unless you do a complete conversion and get rid of the old regulator.

Are you sure you want to go this way? I think I would stick with the factory setup, if not for me for the next guy! :~)

Here is your stock alternator from the second number you gave me, externally regulated.


 

[Bern]

"W" is usually warning lamp.
 

[Roger Martin]

I can see that mounting it and fabricating a new belt tension arm was the easy part.

I will look for the external regulator tomorrow.
If not simple, I will have to send the new alternator back for exchange.
 

[Mark K]

Was there a reason to switch to the current setup?