second headlight


Information and questions on GL1100 Goldwings (1980-1983)
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tegid
Posts: 32
Joined: Tue Feb 26, 2019 11:14 am
Location: France
Motorcycle: Goldwing gl1100 1983 with sidecar jeaniel
BMW K75 1985

second headlight

Post by tegid »



I have a GL1100 1983 with sidecar. I would like to fit a second headlight onto the sidecar (for added protection). I see on the web several possible types of auxiliary headlamps that I could mount on the side without too much of a problem. My question is about wiring into the bike: What would be the maximum amps I could safely draw from the existing headlight circuit? Where would be a good place to connect into the loom?
Any ideas welcome?
Frank


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virgilmobile
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Motorcycle: 1988 GL1500 I
Previously owned
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Re: second headlight

Post by virgilmobile »

At best the bike can provide about 10 amp extra.Thats also above 3k rpm.with everything working perfectly.
Personally I wouldn't hook up anything but LED lights as extras.
I'd also suggest a volt meter on the bike to monitor the charging system.
It's best practice to NOT increase the load as the bike is borderline charging now.
If you add a load,try to offset it by reducing the load elsewhere..such as more led lights replacing the incandescent ones.
Led lighting does draw little power compared to incandescent lamps but every amp load adds up.
User avatar
tegid
Posts: 32
Joined: Tue Feb 26, 2019 11:14 am
Location: France
Motorcycle: Goldwing gl1100 1983 with sidecar jeaniel
BMW K75 1985

Re: second headlight

Post by tegid »

Salut
Thanks for the reply - I have a voltmeter already installed o the dash. I will have a look at LED's and possibly look at changing a few lights to LED. Any ideas on wiring the auxiliary lights - I see mention of needing to instal a relay ? - at this point I would appreciate a circuit diagram, I'm a civil engineer ! Any links to relays (if needed) etc would be useful.
Frank
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AZgl1800
Posts: 2799
Joined: Thu Oct 30, 2008 2:46 pm
Location: Lake Oologah Indian Territory USA
Motorcycle: 2009 Piaggio MP3 250cc https://imgur.com/foGDjgv

'02 GL1800 lives in Dawsonville, GA now.
My son is going to enjoy it for many years to come.

Re: second headlight

Post by AZgl1800 »

Please keep in mind, that the STATOR will always output Maximum Current for a given RPM, and at 3,000 rpm and up, it will be pushing all the charging system can handle....
that means, that the Regulator has to absorb any UNUSED current to keep the voltage from exceeding ~14.3 volts.

IF, you decide to replace a lot of the side lamps, etc. with LED lighting, and don't offset that with extra load elsewhere ( your new headlight for instance ),
the Regulator is going to be over-taxed at absorbing the unused current load.

That means it will get extremely hot, and subject to failure quickly.

The voltmeter on the dash is your friend, try to use that as a guide to how the system is doing.
e.g. does the voltage fall off too quickly at lower RPMs?
or does it continue to stay near 14.3 volts? ( meaning that you have unloaded the stator too much )

compute how much current you have removed from the system, and get a good LED headlight that will use the same amount of current.

you need to keep the charging system balanced as Honda designed it.

an option for you, would be to get one of the new switching series regulators that do NOT absorb current, they use PWM ( pulse width modulation ) to control the output voltage to the charging system.

some suggestions:

Pick one from here: http://www.roadstercycle.com/
( Pay attention to what the article says about installing them Reference keeping them cool, mount it in front of the engine, not behind it. it needs a LOT of air )

http://www.roadstercycle.com/Roadstercy ... lators.htm

https://www.stromtrooper.com/maintenanc ... ifier.html

https://www.vstrom.info/Smf/index.php?topic=20426.0
~John

'02 GL1800
2009 Piaggio MP3 250cc
User avatar
AZgl1800
Posts: 2799
Joined: Thu Oct 30, 2008 2:46 pm
Location: Lake Oologah Indian Territory USA
Motorcycle: 2009 Piaggio MP3 250cc https://imgur.com/foGDjgv

'02 GL1800 lives in Dawsonville, GA now.
My son is going to enjoy it for many years to come.

Re: second headlight

Post by AZgl1800 »

Read way down the page:
if you have any questions, call them on the phone.

Yamaha, Kawasaki, Suzuki, Triumph, Honda, Ducati, SV650, Aprilla, Ducati and many more!
Finally fix your single phase 2 wire and three phase 3 wire charging system problems with a new Mosfet voltage regulator upgrade kit!

Even if you buy a Mosfet somewhere else I will help you out with tech support.
jack@roadstercycle.com
Click here for the Easiest Mosfet Hookup suggestion!!!
Click here for stator testing page.......
Click here for FH012AA/FH020AA/SH775 dimensions

his links did not copy over to here, you can find the statement above on his website.


~John

'02 GL1800
2009 Piaggio MP3 250cc
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