(800) 853-2651
SHOP NOW

966 alternator wiring

M

markinab

New User
which wire goes where on the regulator in the alternator, plug will slide in both ways. There is a large wire about 14 guage with battery voltage to it always and a lighter wire about 18 guage with no power. alternator is heating up and killing the battery.
 
Is this the type of alternator you have... Delco 10SI/12SI?

<img src = "http://i167.photobucket.com/albums/u125/27Grainfield/424IH/Alternator%20Stuff/AlternatorHarness41.jpg">

If so, the #2 (RH in the photo) terminal is "voltage sense", and will have battery voltage at all times.

The #1 (LH) terminal is "switched excite", and will only have power when the key switch is "ON".

Instead of the diode shown in the photo, your tractor will have a resistor that accomplishes the same thing... to limit the reverse flow of current out of the alternator through the "excite" terminal. Also, the #2 wire will likely NOT be connected to the output stud, but will be connected to a point nearer to the battery for BETTER voltage sensing (although the setup shown will work just fine, and is often used in alternator conversions.

To recap... #2 always "hot", #1 only "hot" when key switch is "ON".
 
that is the alternator and that is how it is wired, strange though why it heats up and kills the battery
 
voltage regulator was just replaced under warranty as it quit charging, even before alternator was repaired the second time it killed batteries
 
You don't by chance have two 6V batteries wired in parallel do you?

6 volt batteries need to be wired in series and the 12 volt type need to be in parallel.

Allan
 
Bob is correct, the heat is a bad diode. If under warranty, get them to make it right. If not just buy a diode kit. JimN
 
Just reading the post, & you said there are 2 12-volt batteries?? How are they connected? If they are wired in parallel, you are O.K. If they are in series, you're getting 24-volts.
 
You must log in or register to reply here.

Similar threads

grandpa Love
Alternator issues
Replies
14
Views
755
Rich'sToys
R
T
Alternator confusion on a Case-IH 395
Replies
16
Views
673
Texasmark
T
P
300 u 6 volt gen to 12 volt alternator condition question
Replies
8
Views
475
Paul 300 U
P
J
Ford NAA 3 wire alternator to 1 wire harness
Replies
14
Views
667
JMOR
J
R
john deere 4020 12 volt conversion problem
Replies
2
Views
252
Jim.ME
J
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top