Shortest answer. They are in multiple series circuits with several parallel 120v branches. Thus a single group can fail. The lamps (if they are correct for the string!!!) have a shorting device in each bulb that begins to conduct when the lamp filiment fails. This means all the remaining bulbs get higher voltage than they should. When 3 burn out on the same series segment, the remaining bulbs are given more than enough to fail rapidly. If one whole segment will not light with correct new bulbs it probably has a socket failure. Each bulb has two wires that need to be placed carefully to make contact. (bent around the bulb base). They sell a tool that has the ability to check individual bulbs (battery)and wires for voltage. It is cheap, but also has long directions. My solution is to buy only LED based strings. they do not get hot, and they have 10 times the life span. They are also dimmable with a SCR dimmer. Jim
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 - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
... [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.
