Wiring kill switch question. |
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ReggieV
Senior Member Joined: 12 Oct 2014 Location: Leeds,Yorkshire Status: Offline Points: 456 |
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Posted: 08 Oct 2018 at 14:59 |
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Hello all, I'm putting an aftermarket Domino start/ kill switch on my 1970s Guzzi.
My question is, on the run / kill switch instead of one wire in and one wire out as I expected, there are four wires and four points where the wires are soldered. The two top terminals are linked at the connection pin where it goes into the electrical connector block and so in effect have continuity. The third wire is marked "N" and has continuity with the top terminals with the kill switch live, but not when ignition is killed The fourth wire is marked "ignition lock" and the wiring instructions state that this wire goes to the "de-energised terminal with ignition switched on," and has continuity with the top terminals with the kill switch live, but not when ignition is killed What I intend to do is cut the wire that goes to the "de-energised terminal with ign on" and just use the third wire to complete the ignition circuit on the kill switch. But can anybody tell me what a "de-energised terminal with ignition switched on" is please. Is it for bikes with ECUs ?? I hope that makes sense. |
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Dave P.
Senior Member Joined: 12 Jan 2015 Location: Northants Status: Offline Points: 5573 |
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Could just be the parking light feed. Ignition off, key removed when energised. Ignition on,parking lights off. Just a guess.
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ReggieV
Senior Member Joined: 12 Oct 2014 Location: Leeds,Yorkshire Status: Offline Points: 456 |
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DaveP wrote; "Could just be the parking light feed. Ignition off, key removed when energised. Ignition on,parking lights off. " Hi Dave,it's a possibility. I can't think of anything else or better.
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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Did you mean the 4th wire connects to the top pair when in the 'off' / 'stop' position? |
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"Chicken nuggets don't dance on a Tuesday."
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ReggieV
Senior Member Joined: 12 Oct 2014 Location: Leeds,Yorkshire Status: Offline Points: 456 |
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Mike H wrote; "Did you mean the 4th wire connects to the top pair when in the 'off' / 'stop' position?"
Yes that is effectively correct. But the switch is made so that the two circuits are independent. 1-2 | | 4 3 I've tried to draw a meaningful circuit diagram (above). 1 and 2 are wired independently at the switch, but the 2 wires are joined at the connecting pin and so are (I believe) always live with the ignition on. 3 is marked "N" 4 is marked "ignition lock" and the wiring instructions state that this wire goes to the "de-energised terminal with ignition switched on," Edited by ReggieV - 12 Oct 2018 at 22:27 |
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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OK, well some bikes still have a magneto type ignition, which requires that something be shorted out to stop it. That would be the only way to do it. So the Domino switch is trying to suit both cases by the sounds of it. |
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"Chicken nuggets don't dance on a Tuesday."
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ReggieV
Senior Member Joined: 12 Oct 2014 Location: Leeds,Yorkshire Status: Offline Points: 456 |
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That would make sense. I hadn't considered something like a magneto. It's 41 years since my bike had one.
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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Whatever is the modern equivalent of a battery-less ignition. I do know the ignition switch of such bikes needs a closed contact in the 'off' position to stop it, and, prevent it being started and ridden away by a tealeaf of course. |
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"Chicken nuggets don't dance on a Tuesday."
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iansoady
Senior Member Joined: 23 Jul 2017 Location: Redditch Status: Online Points: 2402 |
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I rather doubt a kill switch would be much of a theft prevention measure....... When I first had a Norton single in the early 1970s I used to leave it anywhere with the ignition on full advance thinking (a) it wasn't worth anybody's time to nick it and (b) they'd break their ankle trying to start it. I was proved wrong on both counts.......
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Ian
1952 Norton ES2 1986 Honda XBR500 1958-ish Greeves/Triumph in progress |
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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I somehow don't think Mike was being totally serious. Even ignition switches using keys don't work, especially when, as in the first Norton Commandos, you could just wrap some fusewire round the terminals on the back of the switch. Equally you could also just put your ginger under the steering lock on the top yoke and press it out. You should have seen the look on the face of the Norton MD (Hugh Palin) when I demonstrated that to him after mine was nicked. The design of both was changed shortly after.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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Gianni
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Does it have to be ginger or can other root spices like galangal or tumeric be substituted?
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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Actually I was, such things do exist. There is a 'breed' of small motorbikes that work this way. Possibly mostly Chinese in origin. |
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"Chicken nuggets don't dance on a Tuesday."
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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Of course not, but the shorted link in the ignition key switch is supposed to. But of course what a thief does is look for the wire it connects to, and cut it. However the Domino switch could work with a magneto, if that's what you've got. |
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"Chicken nuggets don't dance on a Tuesday."
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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Chinese tealeafs then. That's the bit I was talking about.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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