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post #1 of 12 (permalink) Old 04-19-2017, 02:56 PM Thread Starter
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GL 1500 alternator 1990

hello,

My alternator is not providing output. There is no 12v input on the Exiciter wire BLK/LT GRN. Where does this wire go and I assume it it runs from the Ignition switch. I am on holiday and would like to avoid for now removing all the plastic.
Would it be OK to run a wire from the accessory terminal in fuse panel?

It's strange because a few months ago there the engine cut out and it was a problem with the kill-switch, a couple of tiny scres inside had loosened over 27 years. Tightening resolved the issue then.

Would appreciate help,

Rob in Holland -on vacation in Spain.
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post #2 of 12 (permalink) Old 04-19-2017, 03:27 PM
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There may be some model differences, but if it is the same as 94+ models, Blk/Ltgrn wire is connected to the relay 6 (ignition cruise relay) through a white 2 pin connector (C43).

Blk/Ltgrn wire is the same wire going to the kill switch.

And C43 connector is behind left fairing inner cover, near left side of fuel tank.
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post #3 of 12 (permalink) Old 04-19-2017, 04:42 PM
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Have you checked Fuse #11 and Relay #6 for proper function ?

These are the times that try men's souls. The summer soldier and the sunshine patriot will, in this crisis, shrink from the service of their country; but he that stands by it now, deserves the love and thanks of man and woman. Tyranny, like hell, is not easily conquered; yet we have this consolation with us, that the harder the conflict, the more glorious the triumph.
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post #4 of 12 (permalink) Old 04-19-2017, 05:16 PM
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As the Guys said. The BLK/LT GRN wire does not go to the ignition switch. It goes to a relay. Is everything else working on the bike? Engine runs, etc?

Mike

Worked on the "big rigs" for 45 years now just riding my Wing whenever I can. Gets cold in Wisconsin.
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post #5 of 12 (permalink) Old 04-19-2017, 05:29 PM
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Quote:
Originally Posted by dutchaussie View Post
hello,

My alternator is not providing output. There is no 12v input on the Exiciter wire BLK/LT GRN. Where does this wire go and I assume it it runs from the Ignition switch. I am on holiday and would like to avoid for now removing all the plastic.
Would it be OK to run a wire from the accessory terminal in fuse panel?

It's strange because a few months ago there the engine cut out and it was a problem with the kill-switch, a couple of tiny scres inside had loosened over 27 years. Tightening resolved the issue then.

Would appreciate help,

Rob in Holland -on vacation in Spain.
You could jump 12 volts to that wire. You could do it right from the battery but don't forget at night to disconnect. Switched hot jumper from ignition etc. might be better. That will get you home.

Mike

Worked on the "big rigs" for 45 years now just riding my Wing whenever I can. Gets cold in Wisconsin.
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post #6 of 12 (permalink) Old 04-19-2017, 08:19 PM
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Alternator

Rob, There are differences in the wiring circuits for 1988 - 1992 compared to the 1993 - 2000 Gold Wing's.

On your 1990 Gold Wing,

Output from the 55-amp "Dog Bone" fuse goes through fuse # 2 then provides input to the # 8 ignition/cruise relay.

Output from the # 8 ignition/cruise relay is a black/light green wire.

If your engine starts, fuse # 2 and relay # 8 are both good.
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post #7 of 12 (permalink) Old 04-20-2017, 01:04 AM Thread Starter
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Hi there,

Thanks for responses. Engine starts and runs after battery charge,its just that the alternator does not get excited. Will look into suggestions, but easy temorary fix might be to run wire from accessory terminal in fuse box to alternator BLK/LT GRG wire.

Thus it would be ""off"" when ignition is switched off. I am by no means an electric expert but my question is should the exciter wire be ""live"" once motorcycle is running or could damage occur?

This would get us home.

Regards,

Rob
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post #8 of 12 (permalink) Old 04-20-2017, 02:26 AM
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Quote:
Originally Posted by dutchaussie View Post
Hi there,

Thanks for responses. Engine starts and runs after battery charge,its just that the alternator does not get excited. Will look into suggestions, but easy temorary fix might be to run wire from accessory terminal in fuse box to alternator BLK/LT GRG wire.

Thus it would be ""off"" when ignition is switched off. I am by no means an electric expert but my question is should the exciter wire be ""live"" once motorcycle is running or could damage occur?

This would get us home.

Regards,

Rob
That would be fine as long as you did not leave the key in the park or accessory position. If you use off and on only it will be just like it has always been. I see the accessory only has a 5 amp fuse. I think that will be big enough as the power to the field is taken from the alternator output when the alternator is spinning. .

Mike

Worked on the "big rigs" for 45 years now just riding my Wing whenever I can. Gets cold in Wisconsin.
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post #9 of 12 (permalink) Old 04-20-2017, 02:43 AM
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That wire is hot as long as the ignition key is on.

It is especially necessary at the beginning as an exciter voltage. Once the alternator starts producing voltage, it can provide its own exciter voltage.

But, that Blk/Ltgrn input might still be necessary as a feedback input to the regulator to regulate the voltage, (needs confirmation).
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post #10 of 12 (permalink) Old 04-20-2017, 07:25 AM
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Rob, To answer your question, that wire is normally "live" while the engine is running. It is live any time the ignition switch is ON and triggers the ignition/cruise relay (engine running or not). I have a Honda wiring schematic that shows the wiring circuit for your 1990.


Quote:
Originally Posted by dutchaussie View Post
Hi there,

Thanks for responses. Engine starts and runs after battery charge,its just that the alternator does not get excited. Will look into suggestions, but easy temorary fix might be to run wire from accessory terminal in fuse box to alternator BLK/LT GRG wire.

Thus it would be ""off"" when ignition is switched off. I am by no means an electric expert but my question is should the exciter wire be ""live"" once motorcycle is running or could damage occur?

This would get us home.

Regards,

Rob
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