Alternator issue


Information and questions on GL1500 Goldwings (1988-2000)
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NetTech94
Posts: 34
Joined: Sun May 24, 2015 10:01 pm
Location: Port Orchard, WA
Motorcycle: 1994 Goldwing SE

Alternator issue

Postby NetTech94 » Sun Aug 09, 2015 5:40 pm



Recently purchase a rebuilt a alternator from a notably person on many forums have extremely great reviews. I believe the issue on a fluke the alternator spiked too much power. I noted power over a period of time (2 months) steadly going down. 14...13.7....13.5....13.4....13.1 then on one occasion I went to start my gl1500 and the power dropped to 11.2 and the starter hung....

After pulling the alternator for return I noted the plastic insulator for the positive out put was literly melted away...

Anyone ever see this before?



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Uncle Fester
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Motorcycle: 1996 GL-1500 Cali model 'Wing, blue in color, named Ol'Blue

Re: Alternator issue

Postby Uncle Fester » Sun Aug 09, 2015 5:43 pm

I have seen it happen on cars, so it can happen on our bikes too. I am not sure what causes this to happan though, sorry.

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ct1500
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Joined: Wed Nov 10, 2010 8:09 pm
Location: Glastonbury,CT
Motorcycle: 1988 GL1500
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Re: Alternator issue

Postby ct1500 » Sun Aug 09, 2015 7:43 pm

The alternator only outputs 40A max and the charge wire and post insulator are more than up to the task.

Since it is a tight fit installing alternator my guess would be the wire got pinched or insulator cracked or simply post nut was not tightened completely or cracked from over tightening.

Could also have underlying wire/battery issues on bike causing it to eat alternators.
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NetTech94
Posts: 34
Joined: Sun May 24, 2015 10:01 pm
Location: Port Orchard, WA
Motorcycle: 1994 Goldwing SE

Re: Alternator issue

Postby NetTech94 » Sun Aug 09, 2015 9:02 pm

This was a 80amp alternator I bought

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Bluewaterhooker0
Posts: 556
Joined: Wed Nov 14, 2012 11:27 pm
Location: Tampa, Fl
Motorcycle: 1997 Goldwing GL 1500 SE

Re: Alternator issue

Postby Bluewaterhooker0 » Mon Aug 10, 2015 2:19 am

I haven't seen that particular problem, but I work with electrical devices all day. When transmitting any amount of current, but particularly high amounts of current, it is very important to have a rock solid connection at all points along the circuit. Any loose, corroded, or weak connection acts as a resistor, and there will be a heat buildup at that point. I have seen connections carrying as little as 2 amps, burn the wiring, relay, or any device near the bad connection. I suspect that your cable was not able to carry the current properly at that joint, and got hot enough to melt the plastic. The resistance would also explain your failing voltage readings during the process.
It could also be that the cable-to-lug connection is corroded, causing the same effect, and transmitting the heat to the alternator post (acting as a heat sink).

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aperry
Posts: 3
Joined: Fri Dec 10, 2010 7:17 pm
Location: Austin, Texas
Motorcycle: 1999 GL1500 SE

Re: Alternator issue

Postby aperry » Mon Aug 24, 2015 9:08 pm

Due to recommendations I also purchased a rebuilt alternator. It made lots of noise, so I returned it. The replacement one also made noise. I decided to cut my loses, stop spending money on shipping, and bought a brand new cheap one. That failed at 175 miles and stranded me. I re-installed the noisy rebuilt one to get my bike home. On the way home parts inside came loose and knocked a hole in the case of the alternator. I did make it home, but now I need to get another alternator that will work for a while. I'm getting really fast at changing them out.

I run only stock, and I'm not interested in spending the money for the Compu-fire which from what I have read has some problems as well. I saw a recommendation for the one from EMS on another thread. Has anyone else tried it? I really hate to be stranded on the road again.

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mrjay62
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Location: Palmyra NY where the men r men and the sheep r nervous.
Motorcycle: 1994 GL1500 Goldwing. New to me as of June 2015.
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Re: Alternator issue

Postby mrjay62 » Mon Aug 24, 2015 9:54 pm

Hi
I seen it happen on cars , it happened on my volvo 2 summer's ago got a new ALT, New Battery and still happen, In short it was my starter took it apart cleaned it up and all is good now after thorwing 400 bucks at it.... you may want to check what you starter is drawing..
hope this helps.
As always thanks for your help and input...
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RoadRogue
Posts: 1913
Joined: Sun Jun 06, 2010 10:51 pm
Location: Castlegar BC, Canada
Motorcycle: 1997 1500SE

Re: Alternator issue

Postby RoadRogue » Wed Aug 26, 2015 11:21 pm

I run a 90 amp hitachi unit that I bought from EMS. No problems in 2 years and about 40,000 miles. 8-)
Ride safe, Todd
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aperry
Posts: 3
Joined: Fri Dec 10, 2010 7:17 pm
Location: Austin, Texas
Motorcycle: 1999 GL1500 SE

Re: Alternator issue

Postby aperry » Sun Aug 30, 2015 2:03 pm

Thanks I will give it a try.




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