With the Delco internal regulator alternator, following the wiring diagram in the link below should help you wire it correctly.
If it kills the battery when you shut it down, sounds like your #1 alt wire is connected to constant power, and is not turning off with the ignition switch as it must.
Also, it showing a 20 amp discharge while running, MAY be a discharge, or really a charge if the tractor was switched from pos ground to neg ground without switching the wires on the ammeter from side to side (post to post).
If the ammeter is connected wrong for the battery polarity, it will indicate a charge as a discharge. One way to determine that is to switch on a load with the engine stopped(lights, ignition etc.) If the ammeter moves to discharge when the load is switched on, then the ammeter is wired correctly. If it moves to the charge side, then it is reading backwards and needs the ammeter wires switched from post to post to make it read correctly.
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. [ About Us ]
Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
... [Read Article]
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.