Dang it!! The first school IH sent me to was on electrical systems and they must have screwed up and got it wrong!
Or maybe not.
You would be correct if Mother Harvester had gone along with the way that Delco Remy shows the 10 DN system wired, but IH must have thought they had a better idea. The difference is in how the resistor is wired into the circuit. That change also required a change in how power is supplied to the #3 wire.
Like the #4 wire, the #3 wire also comes from the ignition switch. If it were hot all the time there would be a back feed through the external resistor and charge lamp to the ignition switch which would continue to power anything else (fuel gauge, ignition coil, cab relay) connected to that side of the switch.
The diagram below shows how IH wired there machines when using a charge light and 10 DN alternator with external regulator.
This diagram shows what Delco Remy has in their service materials
I didn't say it was the best way, only that it would work. As long as he is going to replace the wiring harness the best solution is to use a custom made harness designed to with a 10 SI rather than a 10 Dn.
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 - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
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.
