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Author Topic: Simplified Wiring Digrams  (Read 76559 times)

Offline Sonreir

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Re: Simplified Wiring Digrams
« Reply #100 on: May 14, 2015, 11:39:11 »
CDI is run entirely from the magneto. No power from the battery. Completely unrelated circuits.
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

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Offline treitz

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Re: Simplified Wiring Digrams
« Reply #101 on: May 14, 2015, 11:49:10 »
Gotcha. So with the coil ungrounded, what could cause the lack of spark? Bad coil, bad CDI?

Offline Sonreir

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Re: Simplified Wiring Digrams
« Reply #102 on: May 14, 2015, 11:52:10 »
There are two black/yellows.

One goes to the coil and the other goes to the kill switch. I'm not sure how these are connector (or not connected) inside the CDI, so there may or may not be a difference between which is which.

Anyway... one of the black/yellows needs to go to the coil and the other needs to be ungrounded in order to get spark.
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys

Offline treitz

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Re: Simplified Wiring Digrams
« Reply #103 on: May 14, 2015, 11:55:12 »
There are two black/yellows.

One goes to the coil and the other goes to the kill switch. I'm not sure how these are connector (or not connected) inside the CDI, so there may or may not be a difference between which is which.

Anyway... one of the black/yellows needs to go to the coil and the other needs to be ungrounded in order to get spark.

Alright. Maybe I'll try flip-flipping the black yellows if it doesn't work. One had a bullet connector, and one had a flat connector, so I think I got them right... but you never know.

Offline treitz

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Re: Simplified Wiring Digrams
« Reply #104 on: May 15, 2015, 11:08:52 »
Switched the black/yellows and still nothin. So what am I missing?

If the magneto is independent of the rest of the system, what tells the magneto when the ignition switch is on? The blue white from the rectifier right?

So I guess I should mention, I added an ignition switch in the main red circuit right after the fuse, before the tail lights and everything else. Probably worth mentioning.

Offline Sonreir

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Re: Simplified Wiring Digrams
« Reply #105 on: May 15, 2015, 11:29:08 »
Switched the black/yellows and still nothin. So what am I missing?

If the magneto is independent of the rest of the system, what tells the magneto when the ignition switch is on? The blue white from the rectifier right?

So I guess I should mention, I added an ignition switch in the main red circuit right after the fuse, before the tail lights and everything else. Probably worth mentioning.

Nothing does. It's completely independent. If you're not getting spark and the yellow/black wire isn't grounded then there's something wrong with the magneto, CDI, coil, and/or associated wiring.
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys

Offline treitz

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Re: Simplified Wiring Digrams
« Reply #106 on: May 15, 2015, 11:35:34 »
Nothing does. It's completely independent. If you're not getting spark and the yellow/black wire isn't grounded then there's something wrong with the magneto, CDI, coil, and/or associated wiring.

The associated wiring is all stock. Two or three connectors from the magneto to the CDI.

Bike ran before disassembly like 6 months ago... so it seams strange that something would just suddenly go out. Where would you start the diagnostic?

Offline Sonreir

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Re: Simplified Wiring Digrams
« Reply #107 on: May 15, 2015, 11:41:38 »
I'd bench test the coil to begin, and then test continuity on all the wires.

If you have an oscilloscope or a peak hold meter, you can test the magneto, but the CDI isn't usually testable at home and is replaced after other things are ruled out.
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys

Offline treitz

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Re: Simplified Wiring Digrams
« Reply #108 on: May 15, 2015, 15:28:02 »
Best resource for step by step guides to testing these items? Never done any of them before.

Offline Sonreir

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Re: Simplified Wiring Digrams
« Reply #109 on: May 15, 2015, 15:59:05 »
CDI (if possible) and magneto tests should be in the service manual.

Coil test info here:
http://www.dotheton.com/forum/index.php?topic=44556.msg679448#msg679448

Because your bike is CDI, the coil may or may not get enough voltage from the battery to trigger, though. The bench test will only tell if if the coil is good, not if the coil is bad. It's possible to get a false negative.
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys