-
The Roadster Factory Recovery Fund - Friends, as you may have heard, The Roadster Factory, a respected British Car Parts business in PA, suffered a total loss in a fire on Christmas Day. Read about it, discuss or ask questions >> HERE. The Triumph Register of America is sponsoring a fund raiser to help TRF get back on their feet. If you can help, vist >> their GoFundMe page.
-
Hey there Guest!
If you enjoy BCF and find our forum a useful resource, if you appreciate not having ads pop up all over the place and you want to ensure we can stay online - Please consider supporting with an "optional" low-cost annual subscription.**Upgrade Now**
(PS: Subscribers don't see this UGLY banner)
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
Lucas Sport Coil
- Thread starter PeterB
- Start date
Share this page
reddsprite
Senior Member
Offline
"SW" = "-" and "CB" = "+". "SW" is switch,"CB" is contact breaker
In the positive earth system the ignition switch supplies power from the Negative battery post, and the contact points ground the other side of the coil to the Positive battery post. Therefore "SW" = "-" and "CB" = "+". This bit of knowledge and logic can avoid confusion if you change your vehicle from positive earth to negative earth. In that case you reverse the coil wires, and the "CB" terminal connects to the positive Switch wire while the "SW" terminal gets grounded to negative through the Contact Breaker.
In the positive earth system the ignition switch supplies power from the Negative battery post, and the contact points ground the other side of the coil to the Positive battery post. Therefore "SW" = "-" and "CB" = "+". This bit of knowledge and logic can avoid confusion if you change your vehicle from positive earth to negative earth. In that case you reverse the coil wires, and the "CB" terminal connects to the positive Switch wire while the "SW" terminal gets grounded to negative through the Contact Breaker.
Similar threads
Similar threads
-
-
-
-
-
-
T
-
-
-
-
-
-
-
-
-
Replacement of Lucas HA12 with Lucas SA12 Coil
- Started by Martin AH 3000 MK III Phase 1
- Replies: 6
-
-
-
TR5/TR250 TR250 - Lucas 4ST Starting Solenoid-Mounting Location/Details- Started by angelfj1
- Replies: 2
-
-
-
-
-
-
-
-
-
-
-
Looking for Lucas parts catalogue
- Started by Martin AH 3000 MK III Phase 1
- Replies: 13
-
-
-
-
-
-
-
-
TR2/3/3A Do Lucas distributor points still have the" Lucas logo" on them....
- Started by karls59tr
- Replies: 4
-
TR2/3/3A What vehicle is this Lucas voltage stabilizer from?
- Started by karls59tr
- Replies: 8
-
-
-
-
-
-
TR2/3/3A What is the little white fiber thing for that comes in the Lucas points box?
- Started by karls59tr
- Replies: 2
-
-
-
-
Led headlight conversion kit with Lucas headlight bucket
- Started by AUSMHLY
- Replies: 37
-
-
A friendly reminder - be careful what links you click on here. If a link is posted by someone you don't know, or the URL looks fishy, DON'T CLICK. Spammers sometimes post links that lead to sites that can infect your computer, so be mindful what you click.