1999 GL1500 SE... Charging problem - Steve Saunders Goldwing Forums

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post #1 of 19 (permalink) Old 05-04-2017, 06:06 AM Thread Starter
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1999 GL1500 SE... Charging problem

Hi guys I know there are a lot of threads on this subject but they all get quit involved and then off the subject, so please excuse me for starting my own thread.

While riding the bike it just cut out I thought is was the battery as it was flat so took it out and charged it overnight and it took the full charge and kept it for a few hour before instaling it again. I then started the bike and then checked the volts with a multi meter at the battery while the bike was running and it showed just over 11 volts, then revved the motor and there was no increase in the volts. Then I left the bike running for a while and the volts dropped to below 11 volts, switched off and then could not restart the bike.

Now my question, is this an Alternator problem or is there anything else that could be doing this. What all can be checked or must I just remove the alternator and have it rebuilt. Thanks in advance guys hope I can get some clarity on this....
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post #2 of 19 (permalink) Old 05-04-2017, 07:22 AM
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Hi guys I know there are a lot of threads on this subject but they all get quit involved and then off the subject, so please excuse me for starting my own thread.

While riding the bike it just cut out I thought is was the battery as it was flat so took it out and charged it overnight and it took the full charge and kept it for a few hour before instaling it again. I then started the bike and then checked the volts with a multi meter at the battery while the bike was running and it showed just over 11 volts, then revved the motor and there was no increase in the volts. Then I left the bike running for a while and the volts dropped to below 11 volts, switched off and then could not restart the bike.

Now my question, is this an Alternator problem or is there anything else that could be doing this. What all can be checked or must I just remove the alternator and have it rebuilt. Thanks in advance guys hope I can get some clarity on this....
The brushes in the alternator may be the culprit. They might be worn, stuck or dirt and dust collected there.

You may try to clean or replace them with new ones.

Or there may be some other issues in the other parts of it, you may want to take it out and test it in an alternator shop.

And if the 55A fuse is bad, your bike model will start but not charge the battery, although the alternator is good.
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post #3 of 19 (permalink) Old 05-04-2017, 07:27 AM
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Could be bad battery..bad cell have it checked at a battery place, could be bad regulator/rectifier; could be bad connection..

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post #4 of 19 (permalink) Old 05-04-2017, 08:00 AM
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If your horn, turn signals and headlights work the 55-amp fuse is good. No need to check it....!
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post #5 of 19 (permalink) Old 05-04-2017, 11:21 AM
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There is way more possibility that the alternator has failed. That is a very common issue on your bike. They had trouble with a crimp connector on the rotor. (field) I bet the last tine you rode the bike it idled a little faster than normal? Say around 1000 RPM instead of 750 RPM. That is because if the alternator is not charging that lessens the load on the engine.

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post #6 of 19 (permalink) Old 05-04-2017, 11:45 AM
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Originally Posted by redwing52 View Post
I bet the last tine you rode the bike it idled a little faster than normal? Say around 1000 RPM instead of 750 RPM. That is because if the alternator is not charging that lessens the load on the engine.
Interesting. I have wondered what could cause such a thing.
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post #7 of 19 (permalink) Old 05-04-2017, 12:01 PM
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Quote:
Originally Posted by Erdeniz Umman View Post
The brushes in the alternator may be the culprit. They might be worn, stuck or dirt and dust collected there.

You may try to clean or replace them with new ones.

Or there may be some other issues in the other parts of it, you may want to take it out and test it in an alternator shop.

And if the 55A fuse is bad, your bike model will start but not charge the battery, although the alternator is good.
I agree with Erdeniz,

More than likely the brushes are hanging up in their slots within the alternator... This is a very common mode of failure with the 1500 alternators and actually happened to me twice with my own 1500 when I owned it...

The solution is to remove the alternator, open it up and clean the brush holders with a good contact cleaner flushing out all the old graphite from the brushes... While your in there, might as well replace the brushes as well, and check the front and rear bearings too...

There is an outside chance that it may be an alternator failure as referenced in this post as a lot of the later model year alternators had issues with this but I'm betting it is the brushes either hanging up or needing replacement...

Good luck with the repair...

Les

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post #8 of 19 (permalink) Old 05-04-2017, 12:39 PM
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+1 on the brushes. Don't go looking for exotic problems when there probably isn't one.

Terry

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post #9 of 19 (permalink) Old 05-04-2017, 03:00 PM
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I don't see where anyone said to replace the 4 rubber blocks that protect the rotor from engine pulsations.

those will nearly always be hard and some crumble.

get new ones, they are cheap.
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post #10 of 19 (permalink) Old 05-04-2017, 08:36 PM
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I don't see where anyone said to replace the 4 rubber blocks that protect the rotor from engine pulsations.

those will nearly always be hard and some crumble.

get new ones, they are cheap.
Good thought - yup - do that too!!

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