no juice to the plugs

[Guest]

New to the website. Just bought an 82 750T. Wiring seems wonky. The bike turns over like crazy, with the ignition off. No power to the plugs. I tried shorting out the wire to the coil by touchoing it to the frame while turning the bike over. Nothing. Does juice for the spark come directly from the generator, or does it come from the battery? I'm wondering if my generator is shot. Any ideas
thanks
bob

[tom203]

Best to study wiring diagram before getting overly creative or assigning blame

http://www.mtsac.edu/%7Ecliff/storage/gs/GS750_schematic_color.pdf

Welcome- consider putting your bike/model/year in your signature.

[Redman]

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........... I tried shorting out the wire to the coil by touchoing it to the frame while turning the bike over. Nothing. ...........
bob

Yikes !
Not even a spark?
Which wire at the coil?

THe org/wht is power. THe other is to/from the ignitor.

The org/wht wire Power comes from the ignition fuse.

Battery and charging system are connected together, well before the main fuse.

...........I'm wondering if my generator is shot. Any ideas
thanks
bob

GS's charging system don't have any one thing that can be called a generator.
Has a stator (left side of engine case) and a regulator/rectifier (usally near/at battery box).
A general overall check of the charging system would be to measure battery voltage with engion off, and again at about 5 rpm.

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[koolaid_kid]

I agree with both; from your questions you really need to study up on the ignition system prior to touching anything (it is far different than you described). This will prevent much sadness later.

[comedybob]

I first tried the plug wire, with a tester, then the white wire, from the power side of the coil, pulled out of the coil and touched to the frame.I turned it over for about three seconds, and nothing. I'm really confused as to why it turns over with the ignition off, but not with it on. I can't really test the charging system, because the engine won't fire.

[chef1366]

Sounds like your ignition switch is bad.

[tkent02]

I agree with both; from your questions you really need to study up on the ignition system prior to touching anything (it is far different than you described). This will prevent much sadness later.

And quit touching wires to the frame to short out things that you don't understand!! Electrical parts are expensive and too hard to get to fry them just for fun.

[comedybob]

And quit touching wires to the frame to short out things that you don't understand!! Electrical parts are expensive and too hard to get to fry them just for fun.

Yes, Dad. I promise

[JTGS850GL]

Yes, Dad. I promise

Now it's obvious why your chose that name. Seriously, you need to do more research on how things work before you start to short out wires. Pick up the Factory Service Manual and schematics from here and do some studying: http://members.dslextreme.com/users/bikecliff/

[comedybob]

In the process as we speak. I wasn't going any further back than where I was, without using a tester.

[posplayr]

I first tried the plug wire, with a tester, then the white wire, from the power side of the coil, pulled out of the coil and touched to the frame.I turned it over for about three seconds, and nothing. I'm really confused as to why it turns over with the ignition off, but not with it on. I can't really test the charging system, because the engine won't fire.

You can't test anything without a voltmeter. The voltmeter is not a tester, you are the tester. You probably blew your ignition fuse when you grounded the O/W and then had no more power there.

[comedybob]

I know that it's a voltmeter, just had a brain fart at that moment. Actually, there was no power coming through prior to that. It may well be the fuse, but it wasn't me. As I said before, the engine only turns over when the ignition is in the off or parked position. In the on position, there's nothing. I'm pretty sure it's not a short, because when I do press the starter button, in the on position, the headlights and panel lights don't dim at all. There's no crank, just nothing. There was never a spark at any time, no light on the spark-plug wire tester.

[tkent02]

Now that's funny.

[Redman]

................... As I said before, the engine only turns over when the ignition is in the off or parked position. In the on position, there's nothing. .........

If that is true, the ignition switch has invented a new way to operate.


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