overcharging


Information and questions on GL1200 Goldwings (1984-1987)
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84lazyboy
Posts: 3
Joined: Thu Jun 05, 2014 7:23 pm
Location: Shady Cove, Oregon
Motorcycle: 1984 GL1200I Interstate

overcharging

Postby 84lazyboy » Thu Jun 12, 2014 8:07 pm



My bike died after a fuel stop. close to home thankfully. While checking found the stator plug fried. tested the stator , no ground faults and 4.6 volts each leg so far so good, or correct me if I am wrong. Direct soldered the three yellow wires. got a new and battery it fired right up. My issue now is at the battery with my meter at idle I get 14.97 , at 3000rpm it drops to 14.55. My guess is the rectifier but am unsure as how to test it. Any help please.



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WingAdmin
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Re: overcharging

Postby WingAdmin » Thu Jun 12, 2014 9:24 pm

84lazyboy wrote:My bike died after a fuel stop. close to home thankfully. While checking found the stator plug fried. tested the stator , no ground faults and 4.6 volts each leg so far so good, or correct me if I am wrong. Direct soldered the three yellow wires. got a new and battery it fired right up. My issue now is at the battery with my meter at idle I get 14.97 , at 3000rpm it drops to 14.55. My guess is the rectifier but am unsure as how to test it. Any help please.


When you say 4.6 volts, how did you measure that? The correct way to measure stator output is to set your meter to AC mode, and measure between each set of "legs" on the yellow wires coming from the stator - A to B, B to C, C to A. With the engine up around 3,000 RPM you should see >48 VAC on each leg.

Very odd that you are seeing HIGHER voltage at idle than you are at 3,000 RPM.

In any case, take your meter, in DC mode, put one test lead on the black wire on the regulator, and the other lead on the positive terminal of the battery. Run the engine up to 3,000 RPM, and read the voltage on your meter. You shouldn't see more than about half a volt. Any higher, and this is going to be the cause of your high voltage.

84lazyboy
Posts: 3
Joined: Thu Jun 05, 2014 7:23 pm
Location: Shady Cove, Oregon
Motorcycle: 1984 GL1200I Interstate

Re: overcharging

Postby 84lazyboy » Thu Jun 12, 2014 11:37 pm

Not being the best at electrical , sorry for my ignorance on that . I followed the directions on Steve Saunders site. Anyhow I did as you stated meter on dc positive battery and black wire at the plug and got .46volts . Also rechecked charging at the battery this time 14.87 idle then spiked to 15.05 with a twist of the throttle then back to 14.97 idle to 14.86 at 3000 rpm.

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WingAdmin
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Posts: 17046
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Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: overcharging

Postby WingAdmin » Fri Jun 13, 2014 8:55 am

84lazyboy wrote:Not being the best at electrical , sorry for my ignorance on that . I followed the directions on Steve Saunders site. Anyhow I did as you stated meter on dc positive battery and black wire at the plug and got .46volts . Also rechecked charging at the battery this time 14.87 idle then spiked to 15.05 with a twist of the throttle then back to 14.97 idle to 14.86 at 3000 rpm.


I wish they would take that inaccurate information off that site - we have more people following those instructions and claiming they have problems when in fact they do not.

0.46 volts difference at the black (sense) wire is definitely within tolerances, and should not be responsible for an idle voltage of almost 15 volts. You still might have a sense problem somewhere, but I'm suspecting the problem is with the regulator itself.

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virgilmobile
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Re: overcharging

Postby virgilmobile » Fri Jun 13, 2014 10:32 am

Don't forget the regulator ground and any problems in the plug at the regulator.
My 1200 had just a few corroded terminals there.
When all the connections have been cleared and if it still has high volts,then consider replacing the module.
Look at the connector pins.They need to be clean brass colored not white powder covered, black or green and tight fitting.

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virgilmobile
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Re: overcharging

Postby virgilmobile » Fri Jun 13, 2014 10:36 am

You can also look at this post.It has pictures of the corroded plug at the regulator.viewtopic.php?f=5&t=12522

84lazyboy
Posts: 3
Joined: Thu Jun 05, 2014 7:23 pm
Location: Shady Cove, Oregon
Motorcycle: 1984 GL1200I Interstate

Re: overcharging

Postby 84lazyboy » Fri Jun 13, 2014 11:43 am

I have been reading about the possible groun problem at the regulator plug . Thank you both so much for the feed back. I will check said plug hopefully this evening. Should i ground it back to the battery or just eliminate the plug and solderit all? I've found a good used regulator at the local bike salvage for $45. I may just try that as it is pretty cheap.

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virgilmobile
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83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: overcharging

Postby virgilmobile » Fri Jun 13, 2014 12:09 pm

Eliminate the plug only if cannot be made good.
Some will augment the regulator ground by adding a seperate wire but if its clean at the frame I really saw no need.

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jhngardner367
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Location: Lonoke, Arkansas
Motorcycle: 1984 GL1200I

Re: overcharging

Postby jhngardner367 » Thu Jun 26, 2014 1:52 am

You might also make certain the tester is accurate.
A friend spent 3 hours checking for a high-voltage problem,and it turned out his tester was defective.


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