Alternator wiring connections

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Anonymous
Alternator wiring connections

What are the electrical connections for using the alternator? On the back of the alternator it has two terminals marked B+, a terminal marked D+ and one marked W.

I am told that it is a one wire alternator and I assume the B+ terminal connects to the battery + terminal. What are the other terminals for? Also, what are the specs of the alternator?

Alternator information:
Leece Neville AS123
66021601

Onan 0191-2326-01

Jim Walker

JvanZyl
Prestolite Electric
London, England
Posts - 180

Dear sir,

Attached is wiring diagram of similar unit (D+ is a stud terminal on your alternator, not lucar blade)
B+ connects to Battery +
D+ is warming light and must be connected via a warning bulb and ignition switch to the Battery +. Without D+ connected the alternator will not charge.
W (or ~) is AC tap for tacho.

The link below will take you to alternator spec.
http://www.prestolite.com/pgs_products/specs.php?item_detail_id=8822&ite...

Best regards,
Jacques van Zyl

AttachmentSize
66021126_wiring.pdf 130.95 KB

Best regards,
Jacques van Zyl

terry
Not registered

Alternator A0014415AA does anyone know what wires to hook up to the (field+) and (field-) as well as the (three AC connections) on the back
thank you
terry

Mark Timerman
Prestolite Electric
Texas, USA
Posts - 524

  Good day Terry. that alternator I am told was made for Toro lawn mowers and used by J. Deere too in a lawn mower application. Now that alternator has a remote regulator, and depending on what brand regulator you use will determine how the Field + or field - is hooked up. If the regulator controls the ground circuit, then the Field + will go to the battery positive stud on the back of the alternator, and vice versa if the reg controls the positive circuit. That alternator also has no rectification so it is going to put out a/c current. And each a/c terminal represents one phase, and has a total of 3 phases. I am told that Toro and Deere used it to run a drive motor for the lawn mowers, and if you want to know more about how they are used, I suggest you contact Toro or Deere and see if they can answer your questions regarding how the a/c terminals are used. Sorry I couldn't be of more help, thanks.

Mark Timerman
mtimerman@prestolite.com
Tech service line: 866-288-9853

al finnell
Not registered

dixie 109-18207 (086-215-100) I am trying to get this to work as a generator, no battery for use on a wind turbine.
There is a + - and R post for electrical connections. There are also two terminals at the top (left, volt adjust, r chg indicator terminal.)
I have run up to 2000 rpm and get no voltage. I have connected a capacitor across the - and + , still nothing.
How do I get voltage???

Mark Timerman
Prestolite Electric
Texas, USA
Posts - 524

Good day, that is not a batteryless alternator, and you are going to need a battery for it to work, even if it was a batteryless system, you will still need voltage to excite the alternator. I have attached an outline drawing for that part number, if you still have questions please call our tech service line thanks

AttachmentSize
086-215-100_7096056A33_B.pdf 174.84 KB

Mark Timerman
mtimerman@prestolite.com
Tech service line: 866-288-9853

GettinBetter
Not registered

B+ connects to Battery +ve
D+ is warming light and must be connected via a warning bulb and switch to the Battery +ve.

Without D+ connected the alternator will not charge.

W (or ~) is AC tap for tacho. (not needed for basic generating)

As posted previously by Jacques van Zyl
In other words you have to apply a small current to the B+ terminal to get it to start to generate.

"In other words you have to apply a small current to the B+ terminal"

That should read D+ terminal.

sam1983
Not registered

Hello
I got a (Ford Capri | 70 Amp ALTERNATOR | 1.3L (A127))
With stud connections B+ ,D+ and w ,,
I know B+ must be connected to Battery + ,But i dont know which pin must be connected to Battery - ?
I appreciate you guide me on that.

JvanZyl
Prestolite Electric
London, England
Posts - 180

Dear sir,

B+ = Battery positive
D+ = Warning lamp
W = Tacho / Rev counter (Optional)

If no dedicated B- terminal then the alternator will be earth return machine and pick-up battery negative via vehicle chassis.

Best regards,

Best regards,
Jacques van Zyl

Steve D
Not registered

Hello Jacques,
I have a question.

I am building a 24v generator for use in topping up batteries on a stand alone solar power system.

Can the D+ terminal be permanently connected to the battery?

Would this draw any current while alternator is not turning?

Regards
Steve

JvanZyl
Prestolite Electric
London, England
Posts - 180

Dear sir,

The D+ connection must be switched. It will drain your battery when the alternator is not in use.

Best regards,
Jacques van Zyl

Steve D
Not registered

Thanks Jacques, it is.
System working but labouring motor (6.5 hp Honda).
Was ok earlier and revving well.
After it run out of fuel while air conditioning and still on - it seems to be struggling. May be engine issue
Steve

JvanZyl
Prestolite Electric
London, England
Posts - 180

Hi Steve,

I'm guessing your engine is too small.

A small alternator (24V /55A or 12V / 70A) will require roughly 4-5hp input power from engine to run alternator at full output.
Before the alternator was not charging, so engine was just turning a "dead weight".

Best regards,
Jacques van Zyl

Jeremy Erscott
Not registered

Hi there, ive got a ford capri mk3 1.6 and am upgrading to a 70amp 2litre sierra alternator, which was called a 'W' connection alternator on the computer, ive got B+ thats battery positive, and D+ is for the warning light, ive got a W which i think is rev counter? But ive also got a small spade terminal with a little +? Can anyone help with this? :) thankyou

JvanZyl
Prestolite Electric
London, England
Posts - 180

Dear sir,

Yes, the W is for the rev counter.

The little + lucar spade terminal is for fitment of a capacitor between + spade and negative (earth, if grounded machine). Some units do not have this fitted, but it is advised. See attached photo. Cap rating 2.2mF / 100V

Best regards,
Jacques van Zyl

AttachmentSize
P4170053.jpg 360.58 KB

Best regards,
Jacques van Zyl

Andy6653
Not registered

If the D terminal is connected to a warning bulb but the bulb is blown, will the alternator then not charge?

JvanZyl
Prestolite Electric
London, England
Posts - 180

Correct. The D+ circuit will be open circuit, i.e. no excitation voltage.

Best regards,
Jacques van Zyl

Best regards,
Jacques van Zyl

Jack P
Not registered

I am trying to rewire a Ford 7000 tractor and having problems wiring the alternator and voltage regulator. The alternator looks like this one:
http://www.ebay.com/itm/Alternator-Ford-Tractor-6000-7000-8000-9000-8AL2...

I believe the terminal at 12 o'clock is Field; at 3 o'clock is ????, label looks like AC Tap; at 4 o'clock is Ground; at 7 o'clock is Batt; and at 10 o'clock is REG. I am not sure what to do with the terms at 3 o'clock and at 10 o'clock. Field, Batt and Ground are pretty obvious.

The VR looks like this one:
http://www.ebay.com/itm/D1NN10316A-Ford-NH-2000-3000-3500-4110-5000-7000...

This VR is probably a rebuilt Prestolite unit and looks identical to the old VR I took off the tractor. The old VR has a Prestolite tag on it but I cannot read the model number. The old VR wire colors(l-r) are green (?), yellow(?), red, black. I am not sure how to wire either the alternator or the VR. There is no longer an "Alternator" lite on the instrument panel but I can add one or a resistor if needed to provide excitation voltage to the alternator, but where to connect on the alternator?. I have installed a voltage gauge instead to read batt voltage.
Any help on how to wire this up would be greatly appreciated.

Cliff
Not registered

Can you please send me the wiring diagram for a 4800J alternator? Thank you

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