1993 GL1500 CompuFire Alternator


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profiteth
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1993 GL1500 CompuFire Alternator

Postby profiteth » Sat Sep 12, 2015 8:51 pm



Around one year ago, I replaced the stock alternator on my 93 GL1500 SE with the CompuFire Alternator. I am by no means a professional mechanic, I did the work myself, spent the money I could afford. I didn't replace the battery with a compufire battery until about six months after because my budget didn't allow it. I never replaced the dampening rubber bushings, being my first alternator swap and a novice, I did not do enough research. It has been one year, My alternator and battery never really gave me any issues after the setup was complete, prior to this I was have slight issues, with the alternator light coming on every now and then. Now I am back to the original issue. My alt light comes on and goes off less than it stays on.

I've put 100 miles on the bike with the light on, and i am having no issues starting it, and It is not dying on me. It's running fine, I have a faulty cluster I do believe, may this be the issue? The speedometer lights from 0-55 are off, but from 55-125 they are lighting up, and the tachometer lights are on and working well

I've charged the battery, thinking maybe it was low, without any equipment to test it, nor test the voltage of the alternator. I was curious if I replaced the dampening rubbers now, would it would be too late, or if they would have any positive outcome, or do I need to replace the alternator again, this time with the new dampening rubbers? Any advice would be greatly appreciated. I am so poor, I don't know where to spend the last of my money, I can't afford to waste any to be honest. This bike is my only vehicle.

Thanks, and sorry I'm such a bike tech noob



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Re: 1993 GL1500 CompuFire Alternator

Postby WingAdmin » Sat Sep 12, 2015 9:04 pm

Do you have a voltmeter of any kind with which to test the output of the alternator or battery voltage?

That's the first thing you're going to need. Even a $5 digital voltmeter from Harbor Freight will fill the bill.

profiteth
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Re: 1993 GL1500 CompuFire Alternator

Postby profiteth » Sat Sep 12, 2015 9:18 pm

Okay I will have to go invest in one... Don't even know how to use one, but I'll watch some videos.

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Re: 1993 GL1500 CompuFire Alternator

Postby spiralout » Sat Sep 12, 2015 9:35 pm

profiteth wrote:Okay I will have to go invest in one... Don't even know how to use one, but I'll watch some videos.

Invest in a $1 item at Harbor Freight instead and use a coupon to get the meter for free. Some coupons here https://givingassistant.org/coupon-codes/harborfreight.com#
and here's a .jpg you can save to a phone and present to the cashier

profiteth
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Re: 1993 GL1500 CompuFire Alternator

Postby profiteth » Sat Sep 12, 2015 9:44 pm

thanks so much, will do!!!!

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guitarzan
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Re: 1993 GL1500 CompuFire Alternator

Postby guitarzan » Sun Sep 13, 2015 3:01 am

Please keep us up to date on this. It's real interesting I cant wait to find out what the problem is.

Frank

profiteth
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Re: 1993 GL1500 CompuFire Alternator

Postby profiteth » Sun Sep 13, 2015 5:32 am

Will do, may be a few days or weeks before I figure it out, thanks

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Re: 1993 GL1500 CompuFire Alternator

Postby robb » Sun Sep 13, 2015 12:51 pm

Five years ago when my alternator was replaced there were no damper replacement to be found, everyone was out of stock. Original damper was not destroyed but was broken into two pieces. Battery was one from Walmart and only recently replaced with a gel cell battery. After 6k have had no problem.
There are 2 bulbs for the speedo, your left is most likely burned out.

profiteth
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Re: 1993 GL1500 CompuFire Alternator

Postby profiteth » Wed Sep 16, 2015 12:23 pm

profiteth wrote:Will do, may be a few days or weeks before I figure it out, thanks



Okay so I just got through taking the alternator back apart and here is what I found. Hopefully it didn't cause any damage to the alternator, new rubbers are on order. 3 out of 4 were broken into two

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Re: 1993 GL1500 CompuFire Alternator

Postby Bluewaterhooker0 » Fri Sep 18, 2015 10:15 pm

Your original post mentions that your "alternator light" comes on. Now it stays on most of the time. What alternator light are you talking about ? I'm not aware of such a light that is stock on the gauge cluster.


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Re: 1993 GL1500 CompuFire Alternator

Postby profiteth » Mon Nov 16, 2015 12:53 pm

In your diagram, there is a empty light, right next to the "cruise on" light, that is where the alt light is. I've also been really frustrated because I followed a youtube video

on how to install a compu fire alt in a GL 1500 and the instructor that installed his alternator installed his dampers opposite the diagram that is to follow. The instructor on the video shows the dampers with the strap going over the teeth in the engine case, and according to long sought research, this may not be the correct way to install the dampers. The rubber dampers should go between the teeth in the casing with the strap on the inside towards the front of the bike and not over the teeth facing myself as I install....????? I have had nothing but problems for the past few months, trying to figure this out. I just turned the dampers around to go according to this diagram and hopefully I've installed them right. Charging the battery overnight we shall see if the light goes off tomorrow with a fully charged battery and hopefully a fully functioning alternator. BTW, I was left stranded 32 miles from home all thanks to shady instructions from shady characters, including compu fire themselves. I'm really frustrated as to why I cannot figure out why my compu fire alternator is not charging my compu fire battery...

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Re: 1993 GL1500 CompuFire Alternator

Postby MikeB » Mon Nov 16, 2015 2:50 pm

As WingAdmin says, get a voltmeter and do some investigating. At the end of the Compu-Fire alternator installation video, you see the presenter use a meter and check the battery voltage at idle and with the engine revving above idle. I suspect your Alternator warning light is malfunctioning but you will not know it unless you test the battery and alternator.

I do not know what your alternator warning light is set for but it should not be on unless your voltage is dropping below 12 volts. I assume it is a V&P Accessories http://www.vpaccessories.com/accessories.htm Alternator Warning Light:
The Solid state unit goes under left pocket and is wired to the accessory terminals. Socket light goes in unused socket on far right of dash beyond cruise indicator.

To test the battery, all you need to do is to touch the meter probe tips to the battery terminals and it will show the battery/system voltage on the meter as long as the meter is turned ON and the selector is set to DCV (Direct Current Volts).

If you have the Harbor Freight voltmeter, use the 20 volt range setting under the DCV bank of settings. This will give you a two decimal readout (12.75). In actuality you can have it set to any range that is greater than the voltage you are measuring. In the 200 volt range, it will only be a single decimal point reading (12.8).

To use the meter, plug the probes into the receptacles at the bottom right corner of the meter. There are three holes. Use the bottom hole for the black negative probe. The hole is marked COM which stands for common or negative. Use the second hole up marked VΩmA for the red positive probe. The top hole marked 10ADC is for current measurements up to 10 amps. You will most likely never have to use this for your probe.

Touch the probe tips to the battery, RED to the positive and BLACK to the negative or some other suitable ground point. Read the voltage on the LCD screen of the meter. If you don't see the reading, make sure the meter is turned on.

With engine running at idle, you will probably be reading above 13 volts (13.00 - 13.50) with a Compu-Fire alternator. In any case, you should not be reading below 12.8 volts unless the engine is not running.

A fully charged battery, not connected to anything should read about 12.75 volts. Connected to the bike, it should be between 12.4 and 12.8 volts, depending on the state of your battery's charge.

By thew way, the snubbers for the alternator are installed as depicted in the video. The do not go in the way it shows in the illustrated parts breakdown. At least that is what I have seen in the dozen wings or so that I have had to work with.
MikeB
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ct1500
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Re: 1993 GL1500 CompuFire Alternator

Postby ct1500 » Mon Nov 16, 2015 5:16 pm

I have repaired, rebuilt and replaced many 1500 alternators and the video is absolutely correct on how the drive rubbers are installed.
This is what I do
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profiteth
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Re: 1993 GL1500 CompuFire Alternator

Postby profiteth » Mon Nov 16, 2015 7:50 pm

So why does the other diagram show the rubber dappers going into the engine case strap first, and why then, when I installed the rubbers with the strap in first, my light on my alternator went off, and my alternator was spinning on start up and seemed to be working properly? Does it really matter which way they are installed? Essentially, wouldn't they be doing the same thing no matter what, as long as teeth of the alternator are between two pieces of rubber instead of metal on metal? I have them in strap first and I can see the alternator is spinning upon cranking the engine... Thanks for any advice

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Re: 1993 GL1500 CompuFire Alternator

Postby MikeB » Mon Nov 16, 2015 8:09 pm

I guess all that maters is that it works for you. I wish you continued good luck.
MikeB
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profiteth
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Re: 1993 GL1500 CompuFire Alternator

Postby profiteth » Mon Nov 16, 2015 8:24 pm

Ill never figure it out, Goldwing for sale, $2500, anyone interested?

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Re: 1993 GL1500 CompuFire Alternator

Postby ct1500 » Mon Nov 16, 2015 8:27 pm

profiteth wrote:So why does the other diagram show the rubber dappers going into the engine case strap first, and why then, when I installed the rubbers with the strap in first, my light on my alternator went off, and my alternator was spinning on start up and seemed to be working properly? Does it really matter which way they are installed? Essentially, wouldn't they be doing the same thing no matter what, as long as teeth of the alternator are between two pieces of rubber instead of metal on metal? I have them in strap first and I can see the alternator is spinning upon cranking the engine... Thanks for any advice


Because the parts manual diagram is wrong just like many other known omissions/mistakes in Honda publications whereas in the service manual diagram it shows correctly. Why your light went off is not due to the drive rubbers, even if they were left out the alternator would still spin. I am sure alternator drive rubber orientation matters to Honda who designed it that way for a particular reason but do what you like. :)
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Re: 1993 GL1500 CompuFire Alternator

Postby OldZX11Rider » Wed Nov 18, 2015 3:15 pm

I can't answer your question reference your compufire alternator, but I have a question. Are you supposed to have a compufire battery to use their alternator?
My last two bikes, neither one was a Goldwing, when it came time for a new battery I bought an AGM battery. Will a compufire alternator not work with an AGM battery? Why not?
I'm just curious about things like this.
I've seen advertisers say "You must have a blah blah blah to work with our product". But in the real world their product will work with any blah blah blah just fine.
Like I said, just curious.

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Re: 1993 GL1500 CompuFire Alternator

Postby WingAdmin » Wed Nov 18, 2015 3:32 pm

OldZX11Rider wrote:I can't answer your question reference your compufire alternator, but I have a question. Are you supposed to have a compufire battery to use their alternator?
My last two bikes, neither one was a Goldwing, when it came time for a new battery I bought an AGM battery. Will a compufire alternator not work with an AGM battery? Why not?
I'm just curious about things like this.
I've seen advertisers say "You must have a blah blah blah to work with our product". But in the real world their product will work with any blah blah blah just fine.
Like I said, just curious.


You should have an AGM battery if you are running a Compufire alternator. Whether you use one of their batteries or a different AGM battery is up to you. The Compufire will boil a typical wet cell battery dry.

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Re: 1993 GL1500 CompuFire Alternator

Postby OldZX11Rider » Wed Nov 18, 2015 3:46 pm

Thank you for the rapid reply. I was just curious.
The origin poster said it was 6 months or so before he got the right battery, could his wiring have been damaged while the old battery was being used?
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Re: 1993 GL1500 CompuFire Alternator

Postby WingAdmin » Wed Nov 18, 2015 4:20 pm

OldZX11Rider wrote:Thank you for the rapid reply. I was just curious.
The origin poster said it was 6 months or so before he got the right battery, could his wiring have been damaged while the old battery was being used?


No, it won't damage wiring, only the battery (potentially).

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Re: 1993 GL1500 CompuFire Alternator

Postby OldZX11Rider » Thu Nov 19, 2015 1:47 pm

Just 're-read everything again. He still doesn't have an AGM battery. He replaced his battery with a gel cell. Could that be part of the problem?

Without any test meters, did you change your alternator because your ALT light was coming on? Under what circumstances did it come on? Don't give up on it. I, as well as many others, want to know what the fix is.

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Re: 1993 GL1500 CompuFire Alternator

Postby ka4yqi » Thu Nov 19, 2015 11:48 pm

post a picture of it.
Steve


RE: 1993 GL1500 COMPUFIRE ALTERNATOR
Post by profiteth » Mon Nov 16, 2015 9:24 pm

Ill never figure it out, Goldwing for sale, $2500, anyone interested?



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Re: 1993 GL1500 CompuFire Alternator

Postby OldZX11Rider » Sun Nov 22, 2015 1:01 pm

You may just have a faulty indicator light. Long as everything is working and it's starting normally, just keep riding it.
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Re: 1993 GL1500 CompuFire Alternator

Postby mlsprowl@yahoo.com » Tue Jul 12, 2016 9:19 am

I see he uses a different main fuse. My 95 amp alt, that I just installed yesterday did not come with instructions or any fuses. Where do I get fuses and are they stock, just double them up? What is the fuses' amp rating? I took my bike out last night for a trail run and it did well but I did smell that foam insulation that is on the lower side cover and the engine covers were hot but since I have not felt them before I have nothing to compare it to. I have alot of lights on my bike and at idle I was getting 11.5 volts sometimes dropping to 11.0 volts. Now it's 13.0 volts after the bike is warmed up.I have no idea my amperage draw but I have been changing over to LED's. Are those double fuses necessary ? what are the fuses rated at and where do I get them.?




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