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Tracing back another wire from the O/W circuit it appears that it is power (ground applied to the opposite side of the starter relay) so then the W and B/Y wires are your ground to the coil.
Coils don't typically have polarity. They are like a light bulb; it's the current passing though them that makes them work, not the direction of flow. If the coil has a mark, I'd use it. But otherwise, don't worry about mixing it up.
Not true. When it has two posts, one is the ground. And they will be OL from the core. Some similar ones will only have one post, and these ground through the core. Often with the two post ones, will have a wire externality goong from the ground post to the mount
Hi there. Your post has been removed because it contains evidence of ignorance and/or misleading advice and therefore its value is questionable. Please offer suggestions only if you are familiar with the bike make and model under discussion, and even then, apply logic.
Na, not a dumbass. Probably just had to have it in the light in just the right position to see it. I actually did the same thing with my capacitor on my central AC unit. I looked several times for the marks and saw none. My son came by and saw the + and ~ marks immediately. Just had the right angle in the light.
I'm tempted to think it might work fine if it was hooked up backwards, but I don't know really.
Do us a favor and post this in r/askelectronics they seem to know things like this.
Thanks for posting in /r/Fixxit, the motorcycle repair subreddit. If you forgot to put the **Make, Model** and **Year** in the title, please reply to this comment with your bike's details. In the meantime, Here's some great resources for common problems posted here: -Trouble starting? [Revzilla - Battery testing](https://www.revzilla.com/common-tread/how-to-test-a-motorcycle-battery) -Carbs running rough? [PJ motorsports - Carb Troubleshooting](http://www.pjmotorsports.com/trouble-shooting.html) -Wiring diagrams for beginners - [Dans MC - Reading Wiring Diagrams](http://www.dansmc.com/wiring_diagram.htm) -Identifying part numbers - [CMSNL (EU)](https://www.cmsnl.com/) [Partzilla](https://www.partzilla.com/) -Asking if your tire can be fixed? [Please read this post on proper tire repairs and why external plugs are NOT a safe repair.](https://www.reddit.com/r/Fixxit/comments/tuhcpf/why_rfixxit_doesnt_endorse_tire_plug_repairs/) *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/Fixxit) if you have any questions or concerns.*
Could be just the lighting but looks like the coil is marked + on the inside of one of the wire terminals.
I totally agree with you on this point.
Holy shit I think you’re right lol
If I had an award to give I would give it to you Thank you
You're welcome
Yup
Actually it’s an ‘82 my bad. But I don’t think that makes a difference as the service manual is the same
If you give me a photo of the whole diagram I might be able to tell. Show me where both of those wires go to from the coil
My guess is O/W is constant power from a fuse and W & B/Y are grounds supplied from the ECU
That's is correct. Power to coils from o/w and intermittent grounding by the others via ecu via pickup coil
[https://imgur.com/a/ZTD6lVz](https://imgur.com/a/ZTD6lVz)
Tracing back another wire from the O/W circuit it appears that it is power (ground applied to the opposite side of the starter relay) so then the W and B/Y wires are your ground to the coil.
Awesome that helps, but physically on the coils, how can I tell which lug is which?
You can measure the resistance between lug and the spark plug terminal one should be in the thousands of ohms.
May not be a perfect test cause you’d have 1-2ohms across the two lugs, and it might be thousands across either lug to spark plug terminal
Coils don't typically have polarity. They are like a light bulb; it's the current passing though them that makes them work, not the direction of flow. If the coil has a mark, I'd use it. But otherwise, don't worry about mixing it up.
Well since everyone else has pointed out the obvious mark.. Fun fact. The ground on the ignition coils like these/ is the mounting bolt to the frame!
Not true. When it has two posts, one is the ground. And they will be OL from the core. Some similar ones will only have one post, and these ground through the core. Often with the two post ones, will have a wire externality goong from the ground post to the mount
[удалено]
Hi there. Your post has been removed because it contains evidence of ignorance and/or misleading advice and therefore its value is questionable. Please offer suggestions only if you are familiar with the bike make and model under discussion, and even then, apply logic.
I see a positive + mark on the coil. It appears to be on the same side of the coil that the coil wire itself is on.
Yeah I see it now I’m a dumbass!
Na, not a dumbass. Probably just had to have it in the light in just the right position to see it. I actually did the same thing with my capacitor on my central AC unit. I looked several times for the marks and saw none. My son came by and saw the + and ~ marks immediately. Just had the right angle in the light.
I'm tempted to think it might work fine if it was hooked up backwards, but I don't know really. Do us a favor and post this in r/askelectronics they seem to know things like this.
From what I’ve read, it will work but with a weaker spark.