How does this work?

[rexor20]

I'm rebuilding my CB360 and would like to toss the stock wiring harness to simplify everything.

I bought this kill switch from DCC and it looks like its a "push to close" type kill switch. So the circuit is closed only when I push the button, otherwise it springs open and breaks the circuit. I can't figure out how to wire it in so that I don't have to ride around holding the button the entire time.

Any help?

http://www.dimecitycycles.com/vintage-cafe-racer-caferacer-bobber-brat-chopper-custom-motorcycle-electronic-parts-black-handlebar-mounted-headlight-kill-switch-12-0050.html

 

[Sonreir]

You need to get a five pin relay to make that type work. Wire the relay for normally closed so that when you press the kill switch to energize the relay, it breaks the circuit to the coils.

 

[rexor20]

Thanks,

I'm learning this as I go so I googled how a 5 pin relay works. It makes sense but I can't figure out one thing.

I put the coil circuit through the two leads that act as the switch on the relay, and then wire the kill-switch through the other two leads to ground.

But where does the power side of the kill switch wire in? Do I wire it straight into the key "on/off" circuit?


Is this pic correct?

http://www.mp3car.com/imagehosting/12527647e9129233622.bmp

 

[Sonreir]

So with a five pin, you actually have two separate circuits.

The switching circuit is made up of three of the pins and the energizing circuit has two pins.

The switching circuit is not polarized, so you can set it up to have one input and two possible outputs, or two inputs and one output (the former is much more common and useful than the latter, IMHO).

When the energizing circuit receives power and is properly grounded, the switching circuit switches.

The setup for almost all five pin relays looks like this:

Pins 85 and 86 are the energizing circuit and the other three are switching. Pin 30 is the input to the switch and 87 and 87A are the outputs. When there is no power between pins 85 and 86, there is a connection between 30 and 87A. This is called Normally Closed operation. When the energizing circuit receives power, then the switching circuit switches and you now have a complete circuit through pins 30 and 87. This is called Normally Open operation.

So for the push-to-kill style of switch, you want power going to pin 85 and then your kill switch wire connected to pin 86. When you press the kill button, it grounds the relay and you energize it. To get power to the coils, you need power hooked up to pin 30, too. The coils will get fed from pin 87A and 87 is left bare (Don't leave it hanging around or you might get a short. Cap it off).

Now, you have power flowing from pin 30 to 87A, unless you press your kill button.

 

[TheDapperMotorcyclery]

I'd say Sonreir's got it totally right. Great advice

Thanks for the visual reference, Sonreir, that was very helpful! It's a simple thing but sometimes it helps to have that image to look at when you haven't messed with one in a while. Cheers!