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kill switch

Charging System, Wiring, Lighting
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bikedoctor99
honda305.com Member
Posts: 154
Joined: Sat Aug 14, 2010 7:11 am
Location: North Jersey

kill switch

Post by bikedoctor99 » Mon Mar 11, 2013 8:50 pm

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
honda305.com Member
Posts: 411
Joined: Sun Jan 29, 2012 9:18 pm
Location: orofino, idaho

Post by mike in idaho » Tue Mar 12, 2013 9:27 am

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.
'65 YG1
'65 CB160
'66 CL160
'66 CL77
'78 XS650
'79 GL1000
'69 T100R
'68 TR6
'69 T120
'72 750 Commando
my company car is a Kenworth

bikedoctor99
honda305.com Member
Posts: 154
Joined: Sat Aug 14, 2010 7:11 am
Location: North Jersey

kill switch

Post by bikedoctor99 » Tue Mar 12, 2013 9:08 pm

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
honda305.com Member
Posts: 411
Joined: Sun Jan 29, 2012 9:18 pm
Location: orofino, idaho

Post by mike in idaho » Tue Mar 12, 2013 9:42 pm

Don't ground 87, insulate it with a piece of shrink tube or some tape.
'65 YG1
'65 CB160
'66 CL160
'66 CL77
'78 XS650
'79 GL1000
'69 T100R
'68 TR6
'69 T120
'72 750 Commando
my company car is a Kenworth

mike horvath
honda305.com Member
Posts: 209
Joined: Sat Apr 25, 2009 2:16 pm
Location: chino hills, ca.

kill switch

Post by mike horvath » Tue Mar 12, 2013 11:31 pm

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
honda305.com Member
Posts: 154
Joined: Sat Aug 14, 2010 7:11 am
Location: North Jersey

kill switch

Post by bikedoctor99 » Wed Mar 13, 2013 8:55 pm

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

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