Battery Charging issue


Information and questions on GL1200 Goldwings (1984-1987)
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SAILOR
Posts: 117
Joined: Sat Jan 01, 2011 11:24 am
Location: lakewood,wa
Motorcycle: 1984 honda goldwing

Battery Charging issue

Postby SAILOR » Sat May 17, 2014 6:48 pm



I have a GL1200I the other day I was heading down the highway and I noticed my aftermarket volt meter read around 10.5. After I was down the road 10 miles and stopped the battery was wouldn't crank over the engine. Push started the bike almost got home and it died. Got a tow truck to tow me home. I then changed the battery over night. Once fully charged I placed the bike on the kick stand. Checked the battery output with a multi meter it read a little over 12 volts. I then started up the bike and it read about the same. I then hooked the negative probe of the multi-meter to the negative side of my battery and then stuck the positive probe into each one of the yellow wires coming out of the stator. I found each one of the yellow wires read a little over 6 volts, as shown in this video: [youtube]zOG_nmnRT5k.[/youtube]

From what I understand, if I understand it correctly this means my stator is working properly and is not the problem with my charging system. Did I test that stator correctly? What else should to determine what is causing my charging system to not charge the battery?



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virgilmobile
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Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
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Re: Battery Charging issue

Postby virgilmobile » Sun May 18, 2014 3:03 pm

I've never measured a stator that way because there isn't a common ground to the stator.
Its a floating 3 phase AC circuit.
Voltages are measured between pairs of yellow wires only.
As I recall,when unplugged from the harness,the 3 yellow wires measured around 25 volts AC. Between any 2 pairs at 1000 rpm and can reach into the 70 volt AC at 3000 rpm

SAILOR
Posts: 117
Joined: Sat Jan 01, 2011 11:24 am
Location: lakewood,wa
Motorcycle: 1984 honda goldwing

Re: Battery Charging issue

Postby SAILOR » Sun May 18, 2014 3:10 pm

Sorry video didn't display. It was a Steve Saunders video. Are you saying this is not the correct way to read the stator output. Here is the link:



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virgilmobile
Posts: 7663
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Battery Charging issue

Postby virgilmobile » Sun May 18, 2014 6:38 pm

I'm not saying its wrong,just that I've never checked I that way.
It is a AC generator,so I measure for AC.

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WingAdmin
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Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: Battery Charging issue

Postby WingAdmin » Mon May 19, 2014 8:22 am

That video is definitely showing the wrong way to determine the operation of the stator. For one, he is measuring the AC output of one of the three-phase stator wires, against ground, with his meter set to DC. How (or if) the meter shows anything this way is going to depend on the design of the meter itself! Some meters will show zero, some will show a fluctuating value, but different meters from different manufacturers will definitely show different values.

The correct way to check the stator output is to set your meter to AC, and measure each of the two yellow wire pairs: 1-2, 2-3 and 3-1. You should see around 48VAC across each set of leads.




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