Overcharging GL1000K1


Information and questions on GL1000 Goldwings (1975-1979)
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juul09
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Location: Netherlands
Motorcycle: 1976 gl1000 k1

Overcharging GL1000K1

Postby juul09 » Thu Mar 06, 2014 2:13 pm



Hello everybody Julian typing from Holaand here . I've got a problem with my gl1000k1 . It's overcharging a lot . At 5000 rpm 20+ volts . Have changed voltage regulator ( for another 2nd hand one ) plug coming from generator has melted , so i've cut it out and soldered the wires together . Has anybody got any idea's ? HELP



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WingAdmin
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Re: Overcharging GL1000K1

Postby WingAdmin » Thu Mar 06, 2014 3:05 pm

juul09 wrote:Hello everybody Julian typing from Holaand here . I've got a problem with my gl1000k1 . It's overcharging a lot . At 5000 rpm 20+ volts . Have changed voltage regulator ( for another 2nd hand one ) plug coming from generator has melted , so i've cut it out and soldered the wires together . Has anybody got any idea's ? HELP


Welcome, Julian!

You'll see the regulator has three wires: green, yellow and black.

There are three yellow wires coming from the stator (generator). Those wires feed into the rectifier, which changes the three-phase AC into DC. This DC is then fed on another yellow wire from the rectifier to the regulator.

The green wire on the regulator is ground. The black wire on the regulator is the sense wire, which is connected to the ignition switch. It should have +12V on it when the keyswitch is in the "ON" position.

The regulator looks at the voltage differential between the black and green wires, and adjusts itself accordingly to make sure it is putting out the correct voltage.

If the green (ground) wire feeding the regulator is not connected, or has a poor connection, the regulator will see 0 (or very low) voltage differential between the black and green wires, and as a result will attempt to boost its output to compensate. I suspect this is the problem you are experiencing.

Check the ground on your regulator to make sure it is connected to a good ground, and that there is very low (less than a couple of ohms) resistance between it and the battery negative terminal.

You can try using a temporary wire to connect the green wire terminal on the regulator directly to the battery negative terminal. If your output voltage at 5,000 RPM drops to normal, then you know for sure this is your problem.

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virgilmobile
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Re: Overcharging GL1000K1

Postby virgilmobile » Thu Mar 06, 2014 3:20 pm

About the same info here too.

The stator is capable of producing high voltage AC and is rectified and then regulated down to the 14 volt range by shorting (shunting) one leg of the stator to ground...Effectively shorting one of the six internal diodes.

Things to test....with your ohm meter..measure both front and back resistance of each diode.
Verify the regulator has a proper ground..
Augment it by attaching an additional wire from it(green) and connecting it to the battery negative post....
While running the engine,use a Digital volt meter...measure the volts from the battery POSITIVE terminal to the regulator Black wire....There should be no more than 0.6 volts DC....If there is,temporarily attach a wire from the black to the battery positive...This is a reference voltage for the regulator...it must be as close to the actual battery volts as possible.
If it's the problem,a relay can be added into the circuit to fix the problem.

juul09
Posts: 3
Joined: Wed May 04, 2011 5:13 am
Location: Netherlands
Motorcycle: 1976 gl1000 k1

Re: Overcharging GL1000K1

Postby juul09 » Thu Mar 06, 2014 5:10 pm

Thanks to both of you for repling going to bed now tomorrow out comes the voltmeter many thanks

juul09
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Joined: Wed May 04, 2011 5:13 am
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Motorcycle: 1976 gl1000 k1

Re: Overcharging GL1000K1

Postby juul09 » Fri Mar 07, 2014 9:28 am

Checked all the suggestions this morning still charging 20+ volts at the battery . Went to our ( local ) Goldwing vendor for some more exchange parts . Mechanic ( brightspark ) says " I think your voltmeter is defect " Brought a new one for 20 euro's . Went home rebuilt everthing the way it was . My old meter was reading 5 volt to much aagggggggggggghhhhhhhhhhhhhhhhh . Can somebody find a moral in this story ???????Many Thanks again Julian.

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WingAdmin
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1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: Overcharging GL1000K1

Postby WingAdmin » Fri Mar 07, 2014 10:20 am

juul09 wrote:Checked all the suggestions this morning still charging 20+ volts at the battery . Went to our ( local ) Goldwing vendor for some more exchange parts . Mechanic ( brightspark ) says " I think your voltmeter is defect " Brought a new one for 20 euro's . Went home rebuilt everthing the way it was . My old meter was reading 5 volt to much aagggggggggggghhhhhhhhhhhhhhhhh . Can somebody find a moral in this story ???????Many Thanks again Julian.


You know, I *almost* asked this, because I thought; "wow, at 20 volts, his battery should be boiling off its electrolyte." Good to hear things are in order, and at least you now have fixed the melted stator connector issue.




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