The resistor is to prevent substantial current from flowing into the alternator from the ignition in the case that the alternator's internal regulator shorts out. It is a bit redundant in that the resistor alone will work to allow excitation. I have not seen any (nor heard of any) shorted to ground regulators that cause the issue above, so I don't recommend te use of both. But I have no issue with a marker lamp, diode, or resistor at or above 10 ohms being used to limit back feeding the ignition. Jim
Fast Shipping! Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]
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.