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Post by hollo on Jul 26, 2019 17:18:30 GMT 1
Can anyone help to pint me in the right direction ?
I was actually coming back from the MOT center today on my 350LC ,( yay it passed ) when the indicators stopped working , and after further investigation nothing electrical works , so no horn , lights , temp gauge etc . The bike start and runs OK , but the weird think is that it does not turn off at the key . The only way to stop the engine is with the kill switch.
I'm running a battery eliminator if that makes any difference ? , but i swapped the old battery back on , but it still the same. I've had a quick look and the fuses look OK , and no obvious broken wires .
I've no idea where to start , can any help ?
Thanks
Mike
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Post by midlifecrisisrd on Jul 26, 2019 17:34:29 GMT 1
I'd suspect the ignition switch has went faulty
Only thing that will affect all light AND no kill
Check the wiring plug first
Steve
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Post by looey on Jul 26, 2019 18:07:19 GMT 1
Sounds like you've lost an earth somewhere, could be in the ignition switch, could be anywhere.
I've had several bikes, one an X7, where if you disconnect a certain earth, the bike won't stop running when you turn the ignition off.
It was a way of stealing (not by me obviously) some 2-strokes in the 70s & 80's, side panel off, disconnect an earth lead, then they would start and run !!!
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Post by stusco on Jul 26, 2019 18:31:20 GMT 1
I had this a few weeks ago a connector in the headlight for the left hand switchgear had disconnected
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Post by earthman on Jul 26, 2019 20:51:15 GMT 1
I had this a few weeks ago a connector in the headlight for the left hand switchgear had disconnected Did you have the engine running/not turning off via the ignition switch though? Surely that left hand switchgear has nothing to do with the ignition/running of the engine, in theory it could be totally not there and the engine would still run?? |
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Post by looey on Jul 26, 2019 20:53:36 GMT 1
I think the ignition relies on earthing out to stop. Loose the wrong earth and it won't stop. Sure someone will be along with more knowledge on the subject  |
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Post by stusco on Jul 26, 2019 21:26:07 GMT 1
I had this a few weeks ago a connector in the headlight for the left hand switchgear had disconnected Did you have the engine running/not turning off via the ignition switch though? Surely that left hand switchgear has nothing to do with the ignition/running of the engine, in theory it could be totally not there and the engine would still run?? I must have missed that bit back to the drawing board |
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Post by earthman on Jul 27, 2019 7:57:51 GMT 1
I think the ignition relies on earthing out to stop. Loose the wrong earth and it won't stop. Sure someone will be along with more knowledge on the subject Yeah, you could be right, back in the day some mopeds didn't even have an ignition key/barrel, just a push button earthing switch to cut the engine. I'm guessing that the ignition switch on the LC breaks the positive side and the cut out switch sends it to ground? If it is a ground/earth connection problem, I wouldn't have thought that it would be left switch gear or headlamp related but could be totally wrong. Hope the OP can tell us the route of the problem in the end. |
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Post by yamman1066 on Jul 27, 2019 8:22:12 GMT 1
its the fuse box ,look at the small clamps that hold the fuses
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Post by earthman on Jul 27, 2019 9:28:17 GMT 1
its the fuse box ,look at the small clamps that hold the fuses I'd say don't rule that out of course but how would that relate to the ignition switch/ engine not turning off problem?? I replaced the fuse box on mine due to finding one broken/bodged repair by a previous owner, every thing worked fine but I wasn't happy with the bodge. There are two different 'new' replacement boxes I've found, one had non flexible contact holders which clamped the what turned out to be plastic fuses way too tight, they fell apart whilst trying to remove them. The other style has springy fuse holders just like Yamaha had intended, fine for another 30 years use I hope. |
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Post by looey on Jul 27, 2019 10:04:09 GMT 1
its the fuse box ,look at the small clamps that hold the fuses I'd say don't rule that out of course but how would that relate to the ignition switch/ engine not turning off problem?? I replaced the fuse box on mine due to finding one broken/bodged repair by a previous owner, every thing worked fine but I wasn't happy with the bodge. There are two different 'new' replacement boxes I've found, one had non flexible contact holders which clamped the what turned out to be plastic fuses way too tight, they fell apart whilst trying to remove them. The other style has springy fuse holders just like Yamaha had intended, fine for another 30 years use I hope. On my 350LC (not being period correct), I replaced the entire fusebox with individual modern sprung-loaded in-line fuse holders, problems gone forever  |
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Post by midlifecrisisrd on Jul 27, 2019 10:37:37 GMT 1
I'm telling you it's to do with the ignition switch lol
It switches the main power on and off AND connects the black/white wire to black which is the kill circuit
Any lc will start but have no lights if you unplug or cut the ignition switch wire
Steve
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Post by hollo on Jul 27, 2019 17:29:22 GMT 1
Thanks for all the replies , and suggestions . I've already had a quick look at the fuse box , which seemed OK, so I'll take a good look at the ignition switch and it's wiring.
Thanks again for the pointers , this is another example of what a helpful and friendly form this is.
Mike
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Post by hollo on Jul 28, 2019 16:53:10 GMT 1
Success !
I'm not electrical wizard , but even i can see that if the 6 pint plug is apart , it won't work . No idea how or why it came apart within the head lamp shell , but must be the easiest fix I've ever done . I think that the plug must be missing the plastic part the snaps it together , so I've used a cable tie to keep the plug together.
Thanks again for the pointers
Mike
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Post by looey on Jul 30, 2019 12:57:20 GMT 1
Nice result, if only they were all that easy  |
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Post by stusco on Jul 30, 2019 17:54:46 GMT 1
Success ! I'm not electrical wizard , but even i can see that if the 6 pint plug is apart , it won't work . No idea how or why it came apart within the head lamp shell , but must be the easiest fix I've ever done . I think that the plug must be missing the plastic part the snaps it together , so I've used a cable tie to keep the plug together. Thanks again for the pointers Mike Told yah |
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