Probably teaching my granny to suck eggs...again
69 Commando with early switch gear.
Left Hand switch has 2 buttons to earth plus the Headlight Main Beam/Dip Beam switch
Used black button for horn
2nd red button to earth I used as the kill switch by triggering a relay with an "87a" terminal.
This means that the connection from the ignition switch to the EI unit is live as the default (87a terminal) and only switched OFF by operating the relay (Triggered by the kill switch on the handlebar)
- Relay with plastic tab for securing- used cable tie to strap to frame
- Cut the white power wire to the EI box from the ignition switch close to the relay and extended the cable to reach the relay terminals
- Attached wire from ignition switch to "30" Terminal
- Remaining white wire to the EI box connected to "87a" Terminal
- Trigger for relay switch- power wire piggy backed on spliced wire from "30" Terminal ran to "85" Terminal
- Wire from handlebar switch connected to "86" Terminal
- "85" and "86" Terminals activate the relay. You can swap "85"/"86" - polarity not important
Could also use this type of relay for later Commandos with EI to save the long path of the EI feed which has to go up to the handlebar switch and then back down again to the main harness.
Cheers
Eddie
Grteat things...
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Updated simplified wiring from Grant Tiller
Much simpler alternative from someone with more knowledge of BB/Wassel electronics than me!...
Hi Eddie, and great to hear from you!
If you have a Tricon switch, and the spare button that shorts to ground when pushed, there is a much simpler and more reliable way to use it as a kill switch if you have a Boyer Bransden electronic ignition.
You can totally negate the relay by simply wiring the button to the BY (black/yellow) cable that goes between the Boyer Bransden transistor box and stator plate.
Hope this helps!You can see all comments on this post here: https://granttiller.com/tricon#comment-28087#comments
Grant Tiller
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... relays aren't they? I did manage to convert my "push to open" button my Commando to "push to close" by some judicious bending and resoldering but can't for the life of me remember how now. I think I did have something published in RH about it.....
Actually I found the article very easily using the article index: it's in RH181 May 1995 pp34-35. Doesn't time fly.....