kill switch

[bikedoctor99]

I would like to use the original horn button for a kill switch (no horn on my cb77), but I haven't been able to implement it--- so I offer this puzzle to the electrical experts.
Can this be done to ground both coils instantly?
Your help is always appreciated.
Thanks Allan

[mike in idaho]

Use a 5 pin automotive relay. Disconnect the coil power lead (black wire) in the wire harness from the coil connection and connect it to terminals 30 and 86. Connect terminal 87a to the coils. Connect a wire to the 85 terminal and connect it to the horn button wire at the horn mounting location(or inside the headlight shell). If you didn't want do take the tank off to access the wiring, you could do the same thing behind the main switch, using the black wire connection.

[bikedoctor99]

Thanks Mike!
I had, to diagram the relay and study my Clymer wiring diagram & I think it makes sense.
When I press the horn button the relay is energized and all power goes to 87- when the horn button is released the coils are powered again.
Is it necessary to ground the 87?
Thanks for your help,
Allan

[mike in idaho]

Don't ground 87, insulate it with a piece of shrink tube or some tape.

[mike horvath]

Doc,
Just for ideas, this was my way of implementing the kill switch into the grip collar.
http://www.honda305.com/forums/viewtopic.php?t=4084
Very simple...Radio Shack toggle (it's the smallest I could find), two 18ga. wires, some heat shrink tubing, and a couple of hours of your time. Your button idea would work the same, only constant pressure till she dies.

[bikedoctor99]

You guys are the greatest!
Idaho, insulate is good- I see that I would have had a "battery killer" instead of an ignition stop.
Chino, very nicely done! & great looking CL!
Two weeks ago it hit 40° (week before was teens) went to fire up the cb & discovered a hung slide, great incentive for a kill switch/button.
Earlier this evening I ordered relays for the kill button & headlight.
Many thanks for your help,
Allan