Accessory light control unit


Information and questions on GL1500 Goldwings (1988-2000)
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larryheilman
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Accessory light control unit

Postby larryheilman » Sat Jan 21, 2012 9:00 am



I have a 96 GL1500SE with a accessory light control unit that is out. The part is a Omron G8D-121H and is not listed in the schematics. Went to the dealership, websites and no help. Any ideas where I can get a replacement. Larry :?:



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cbx4evr
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Re: Accessory light control unit

Postby cbx4evr » Sat Jan 21, 2012 10:23 am

I've seen this issue before with no conclusion. Have you tried contacting OMRON directly? Can you find a used one some where?

This was mentioned as a solution:

You can bypass the box with a 505 ohm resistor costing a few cents. Feed the light with the input wire from the brakes and running light andput the resistor in the running light wire. That will give you 6 volts for the trunk light when running and 12 volts when you brake.
"It´s a friggen motorcycle, it´s not supposed to be comfortable, quiet or safe. The wind noise is supposed to hurt your ears, the seat should be hard and riding it should make you s**t your pants every now and then. "

larryheilman
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Re: Accessory light control unit

Postby larryheilman » Sat Jan 21, 2012 6:17 pm

cbx4evr wrote:I've seen this issue before with no conclusion. Have you tried contacting OMRON directly? Can you find a used one some where?

This was mentioned as a solution:

You can bypass the box with a 505 ohm resistor costing a few cents. Feed the light with the input wire from the brakes and running light andput the resistor in the running light wire. That will give you 6 volts for the trunk light when running and 12 volts when you brake.


Sounds like a easy fix. Finding 505 ohm resistor these days could be a challenge. If it works will posted.

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virgilmobile
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Re: Accessory light control unit

Postby virgilmobile » Mon Jan 23, 2012 4:44 pm

Just reading this....I've got a 88 that does not have this option.Can you describe what it does,and maybe I can build something for mine.
Also,I gather,It lowers the voltage to some lamps??? until you mash the brake,and then it applies the full 12 volts to brighten them up.
So a 505 ohm resistor would do the job.For that a 470 ohm would also "work",just a bit more volts.Maybe 7 instead of 6 .
The only information lacking is what wattage the resistor needs to be.How many lamps are there and what type are they.
Using a resistor to reduce voltage will need to dissipate the heat.

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WingAdmin
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Re: Accessory light control unit

Postby WingAdmin » Mon Jan 23, 2012 4:53 pm

virgilmobile wrote:Just reading this....I've got a 88 that does not have this option.Can you describe what it does,and maybe I can build something for mine.
Also,I gather,It lowers the voltage to some lamps??? until you mash the brake,and then it applies the full 12 volts to brighten them up.
So a 505 ohm resistor would do the job.For that a 470 ohm would also "work",just a bit more volts.Maybe 7 instead of 6 .
The only information lacking is what wattage the resistor needs to be.How many lamps are there and what type are they.
Using a resistor to reduce voltage will need to dissipate the heat.


It's for the LED trunk-mounted brake light. The LED runs through the 510 ohm resistor inside the control unit when in "running light mode". When the brake light is applied, it lets the full +12V go to the LED strip, without a resistor. It also has a diode or two in there to prevent backfeeding the tail/brake light circuits from one another.

Light control unit
Light control unit

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virgilmobile
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Re: Accessory light control unit

Postby virgilmobile » Tue Jan 24, 2012 11:53 am

Cool application for a 3rd LED light.A easy circuit to build too.Hmmmm...see what you did...And I thought I was near finished with the mods to the 88.
How about converting all the running lights to high brightness LED's....Add the parts and tie to the brake.
When the brake is on....the whole thing lights up like the fair grounds :lol:
Maybe a bit much..huh??

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Re: Accessory light control unit

Postby WingAdmin » Tue Jan 24, 2012 1:21 pm

The words "a bit much" should never apply when talking about lights on your Goldwing. :)

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virgilmobile
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Re: Accessory light control unit

Postby virgilmobile » Tue Jan 24, 2012 4:39 pm

I work with public safety equipment.Fire/Police etc..The last time I outfitted my old 1000,the local PD asked me if I could "tone it down a bit" :( some lame law about distracting lights.
You could see that sucker from a half mile away....before I hit the brakes. :D

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Sempai
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Re: Accessory light control unit

Postby Sempai » Wed Jan 25, 2012 11:22 pm

WingAdmin wrote:The words "a bit much" should never apply when talking about lights on your Goldwing. :)

Hear, hear. I agree.
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Keep the rubber side down.

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virgilmobile
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Re: Accessory light control unit

Postby virgilmobile » Thu Jan 26, 2012 9:47 am

Sempai wrote:
WingAdmin wrote:The words "a bit much" should never apply when talking about lights on your Goldwing. :)

Hear, hear. I agree.


Thanks for the picture.I think thats what the cop wanted...I tried to take a picture of mine when it was outfitted but it turned out like you were looking out from the inside of a Christmas tree. :D

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Sempai
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Re: Accessory light control unit

Postby Sempai » Thu Jan 26, 2012 10:07 am

I looked carefully at the DOT laws regarding roadworthy vehicles and auxiliary lighting. I pushed the limits on my bike.
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Keep the rubber side down.


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