There are 2 different wiring schemes here the one on the left switches the batteries in series or parallel, and the wring diagram on the right switches the Motors in series or parallel to provide the high/low function.
The resistor connected to the throttle switch is a Dynamic Braking (DB) load, a missing resistor here, would just mean the when the throttle is released the unit will coast instead of the load resistor introducing a load across the motors (which will be operating as generators when the unit is coasting) to provide braking.
One good possibility here would be that on the physical wiring configuration the resistor was used as a tie point and when the resistor was removed someone did not re-connect the 2 leads that used the resistor as a tie point.
How are you testing the switch with power on or by using continuity tester?
There are many possibilities for wiring errors or open or bad connections here, Also the jumpers on one of the switches could be missing.
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 - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
... [Read Article]
Latest Ad:
Oliver 550 Diesel runs like a watch three point hitch pto engine gone threw about two hundred hours ago nice clean tractor
[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.