'82 GL1100A, loosing electrical charge

Information and questions on GL1100 Goldwings (1980-1983)
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Posts: 15
Joined: Sat Dec 19, 2009 12:11 pm
Location: Wichita Falls, TX
Motorcycle: 1982 GL100A Aspencade

'82 GL1100A, loosing electrical charge

Post by jmaldo » Mon May 31, 2010 5:07 pm

Hello everyone!
My Goldwing has a new battery and is usually running a charge of about 13-14 volts on the bikes gauge. If I'm running down the road it continues at that level of charge. When I stop at a light it starts to drop down to 10 to 12 volts. If I continue to idle bike with radio on or if the cooling fan comes on, it's charge level is at the lower end. The bike will not start if I shut it off with the radio on. I need to start the bike with everything turned off. I have charged the battery up and it start fine after that, but will continue to discharge the battery while running. Could this be a generator problem or a connector problem?



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Re: '82 GL1100A, loosing electrical charge

Post by WingAdmin » Mon May 31, 2010 9:25 pm

More than likely a connector problem, but you can easily check the stator to see if that's what the problem is.

Disconnect the three yellow wires next to the battery (single connector with three yellow wires). Start the bike up, hold it at about 3000-3500 RPM, and check the AC (not DC!) voltage between each set of two yellow wires (a to b, b to c, c to a). The voltage on each leg should be roughly 48 volts AC.

You might want to also check that connector you disconnect to check the yellow wires - it is undersized, and with any kind of dirt, will heat up and fail. It's recommended to cut it out entirely and solder the wires directly.

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Re: '82 GL1100A, loosing electrical charge

Post by jmaldo » Tue Jun 01, 2010 6:17 am

Great advise! I'll check the three wires with my multimeter. I've heard this before and forgot about it. If it check out good I'll remove the connector and solder the wires together. I'll let you know how it comes out.


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Re: '82 GL1100A, loosing electrical charge

Post by jajeanquart » Wed May 16, 2012 11:33 am

I did the deed on the three wires with engine running
I record 65 volts.......what is that telling me??

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Re: '82 GL1100A, loosing electrical charge

Post by virgilmobile » Wed May 16, 2012 12:34 pm

The unloaded voltage(wires cut loose) from the stator will vary depending on the RPM of the engine.
My 1200 measures 35 volts AC between any pair at 900 rpm.
As I increase the RPM the AC volts also increase.
I wasn't concerned about exactly how much but I've heard of some going to 68 volts at 3500 rpm.
If each pair (3 measurements) have near the same voltage and it is above 25 volts at a idle,the stator probably will be OK.
Where I've seen problems is where there is low voltage,wide differences,open winding or winding shorted to ground.
By wide difference,It may measure on 1 pair 30 VAC and another 8 VAC.This indicates a shorted winding.
It is possible that one winding may be open(no resistance) and produce no voltage on that wire.
This is the reason for the 3 measurements for ohms and volts.

The voltage you measure is OK as long as it measures that between all 3 pairs as Admin described.
Hook it back up,replace the dog-bone fuse link and measure the volts at the battery posts.

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