Very weird ignition switch problem.

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24 Oct 2015 08:10 #695738 by New 750
Very weird ignition switch problem. was created by New 750
So my bike will start without a key in the ignition and turned too off! I have no lights is all, then if I put the key in and turn it to run my dash and headlight, tail light all pop on? Wtf I cannot shut the bike off with the key, I did the coil mod and must remove the fuse to shut the bike off! All the wires behind the aftermarket ignition switch are hooked up, this just started today, what could be the cause?
As always thanks.

1977 kawasaki KZ750

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24 Oct 2015 08:26 #695741 by missionkz
Replied by missionkz on topic Very weird ignition switch problem.
Your wiring is wrong and the coils must be hot all the time.
Does the battery go dead after a few hours?

Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado

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24 Oct 2015 08:30 #695743 by jackleberry
Replied by jackleberry on topic Very weird ignition switch problem.
You say you did the coil mod... It sounds like the relay you used has failed in the closed position or a couple of the wires have shorted together. Try a new relay.

1997 KZ1000P (P16)
2001 KZ1000P (P20)

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24 Oct 2015 08:44 - 24 Oct 2015 08:50 #695748 by Tyrell Corp
Replied by Tyrell Corp on topic Very weird ignition switch problem.
Your wiring is wrong and the coils must be hot all the time.

Yes, ignition switch controls head, tail and ignition circuits. easy to miswire or find a pattern switch with the wrong configuration. Look at the box at the bottom of the wiring diagram, it has a truth table that shows the connections between circuits.

Attachment 14457098949197.jpg not found




Ignore the one I posted, just an example -find the correct diagram for your bike. In this example, note the battery is connected to the ignition and headlight only when ignition switch is in the 'on' position.


Was it doing this before the relay mod?

1980 Gpz550 D1, 1981 GPz550 D1. 1982 GPz750R1. 1983 z1000R R2. all four aces
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Last edit: 24 Oct 2015 08:50 by Tyrell Corp.

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24 Oct 2015 08:58 #695751 by JR
Replied by JR on topic Very weird ignition switch problem.

jackleberry wrote: You say you did the coil mod... It sounds like the relay you used has failed in the closed position or a couple of the wires have shorted together. Try a new relay.


Please let us knowwhat you find but I would bet on this being the problem. Shorted relay or wired incorrectly. Your ignition circuit is live all the time. Like being "hotwired "

1980 kz750E1, Delkevic exhaust

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24 Oct 2015 10:32 #695764 by New 750
Replied by New 750 on topic Very weird ignition switch problem.
Yup that's it! I have not touched anything and the mod has been on the bike for months, it's the relay, and yes battery dies after a while, I can't believe I did not fry the coil, somehow the relay is stuck on.

1977 kawasaki KZ750

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24 Oct 2015 10:41 - 24 Oct 2015 10:42 #695765 by missionkz
Replied by missionkz on topic Very weird ignition switch problem.
Ok. Sounds like you know what to do.
I did not see in the original post that you've operating the bike for months after the relay mod!
In the future try to put more info about when mods were done or how long ago vs when something went wrong. LOL!

Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado
Last edit: 24 Oct 2015 10:42 by missionkz.

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24 Oct 2015 11:14 #695767 by New 750
Replied by New 750 on topic Very weird ignition switch problem.
I put a four pin relay from my minivan in its place and it worked fine, I bought the proper amperage unit per a write up on here, the only thing I can think of it it's exposed to water from time to time, but I would think it should last more then a few months? I was also under the impression that my coils could be fried from constant juice, (assuming the points are closed when shut off) thanks alot for the input, just solved two nagging problems, can't believe I did not check the relay.

1977 kawasaki KZ750

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24 Oct 2015 11:33 #695769 by jackleberry
Replied by jackleberry on topic Very weird ignition switch problem.

New 750 wrote: I put a four pin relay from my minivan in its place and it worked fine, I bought the proper amperage unit per a write up on here, the only thing I can think of it it's exposed to water from time to time, but I would think it should last more then a few months? I was also under the impression that my coils could be fried from constant juice, (assuming the points are closed when shut off) thanks alot for the input, just solved two nagging problems, can't believe I did not check the relay.


You can get 40A relays on ebay dirt cheap these days that are, somewhat surprisingly, sealed with epoxy to keep out the elements. You can do this yourself if you get one that not sealed already.

1997 KZ1000P (P16)
2001 KZ1000P (P20)

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