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 - A Towny Goes Plowing - by Anthony West (UK). I live in an area renowned for its rural beauty. Small fields with hedgerows and trees are common place, as are small hamlets with village greens and the odd duck pond complete with swans. The center of any village once the shop is closed is the old tavern. Rustic places with cheerful names like "The Griffin" "Red Lion" or "The Plough and Harrow" are found dotted around the country lanes all over the place. The warm glow of yellowish light can be seen for quite some distance at dusk, and
... [Read Article]
Latest Ad:
For sale Farmall super A tractor is complete and has just been setting for awhile,it was running when pulled out of the barn,shouldn’t take to much to get it going asking 1100.00
[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.
