Please Help Me Find a Post I Once Read.


Information and questions on GL1200 Goldwings (1984-1987)
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patbrandon1
Posts: 493
Joined: Mon Mar 26, 2012 1:39 am
Location: Bay City, Michigan
Motorcycle: 1987 GL1200I
1982 GL1100I (Crashed)
1981 Honda CM400C (Sold)
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Please Help Me Find a Post I Once Read.

Post by patbrandon1 » Sun Mar 11, 2018 5:30 pm



:oops:

WingAdmin once replied to someone's post and indicated that to save batteries from frying prematurely, and letting the system know there is correct voltage, there was a suggestion by him how to install a rig that will stop this from happening on my 1987 GL1200 I.

I have searched everywhere, and cannot find it. I had saved it in my favorites, but someone stole it, :o or I deleted it by mistake.

If you have a clue what I am talking about, and could direct me to it, I would be very grateful. I know I may not be explaining this very well, but I'm kinda old sometimes.

I appreciate your time.



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Stew
Posts: 271
Joined: Mon Oct 23, 2017 10:40 am
Location: Smokey Point, WA - USA
Motorcycle: 2000 GL1500 SE
2005 Honda CRF230F

Previous bikes:
2003 Honda Ruckus
1993 Honda Elite SR
1986 Honda CR125R
1979 Yamaha GT80

Re: Please Help Me Find a Post I Once Read.

Post by Stew » Sun Mar 11, 2018 8:17 pm

I searched for posts by WingAdmin that contained the words save and batteries, there were three results, are any of these the one?

viewtopic.php?f=18&t=38858&p=238886&hil ... es#p238886

viewtopic.php?f=10&t=27274&p=156430&hil ... es#p156430

viewtopic.php?f=7&t=19786&p=123169&hili ... es#p123169
Winging it every chance I get 8-)

19,119 miles when I got it from dad Oct 15, 2017 --- 22,072 miles and counting as of June 14, 2018!

User avatar
Stew
Posts: 271
Joined: Mon Oct 23, 2017 10:40 am
Location: Smokey Point, WA - USA
Motorcycle: 2000 GL1500 SE
2005 Honda CRF230F

Previous bikes:
2003 Honda Ruckus
1993 Honda Elite SR
1986 Honda CR125R
1979 Yamaha GT80

Re: Please Help Me Find a Post I Once Read.

Post by Stew » Sun Mar 11, 2018 8:19 pm

Winging it every chance I get 8-)

19,119 miles when I got it from dad Oct 15, 2017 --- 22,072 miles and counting as of June 14, 2018!

User avatar
patbrandon1
Posts: 493
Joined: Mon Mar 26, 2012 1:39 am
Location: Bay City, Michigan
Motorcycle: 1987 GL1200I
1982 GL1100I (Crashed)
1981 Honda CM400C (Sold)
Contact:

Re: Please Help Me Find a Post I Once Read.

Post by patbrandon1 » Mon Mar 12, 2018 1:46 am

Thank you for taking the time to search for me Stew. I didn't know I could search individual people when I do a search. I will give that a try and see if I can figure it out.

:D :D :D I found it!
Looking through my old laptop I found a Word document I had saved it to. Here is the link.
viewtopic.php?f=12&t=28610&p=164512&hil ... od#p164512
I hope I did it right. I guess the next thing to do is post another topic to ask if this mod is needed on 1987 GL1200 Interstates.
When I bought this bike in June 2017, (27,408 original miles) I took a multi-meter with me and the voltage output was 13.8 to 14.2. And I have been checking it weekly during riding season with the same results.

I guess I can take this down now, after I know you've seen that it has been found. I really do appreciate your time and kindness.

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Rednaxs60
Posts: 1649
Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD (X2), 2008 GL1800 (sold)

Re: Please Help Me Find a Post I Once Read.

Post by Rednaxs60 » Mon Mar 12, 2018 10:07 am

WingAdmin has a good point in relocating the sense wire. With the existing sense wire connection, the RR will always be outputting more DC to compensate for the voltage loss on the sense wire due to line loss and electrical component(s) requirements. For my money I would relocate the sense wire to the same connection as where the RR first connects into the electrical system. This schematic illustrates this point:


The location is at point A. This junction is in the wiring harness just below the gas fill. This new wire connection will have to be through a relay so that this circuit is not live when the bike is not operating.

It is interesting that this is how the RR sense wire is wired - no power with the key off - because the red/white RR output wires are live at all times because of the connection to the battery. It might be prudent to install a relay in the single red/white wire going to the electrical system so that power is not at the RR when the bike is not operating. I mention a single wire because the two red/white wires from the RR are joined together to a single red/white wire just after the wire disappears into the wiring harness. Possibly better for the RR, don't know, just a thought.

I mention this because most of the power produced by the alternator units goes to operating the bike through the ignition switch, not to the battery and back out again. Pure physics and pressure, battery at ~12.6 VDC, electrical system at ~14.0 VDC, current has to flow towards the battery not from it.

Point A is where the alternator unit delivers all DC required to operate the bike and from this junction is distributed. A good battery that has just started the bike, or been used as supplemental power because the engine RPM was not high enough to maintain an electrical system voltage above the battery voltage (short term events hopefully), will quickly be replenished back to a 100% state of charge, then it accepts a trickle current of ~2 amps, the rest goes through the ignition switch to operate the bike. The further the sense wire connection is from this junction, the more voltage sensed is affected by line loss and component requirements.

You may notice a 30 amp circuit from the starter solenoid at point B. This is specific to the '85 and '86 fuel injected bikes. It does; however, provide an interesting electrical system concept. If you want to install additional electrical devices through a new aux fuse block, this is the location to connect the main feed to the aux fuse block, instead of going to the battery. Works well on the fuel injected bikes and does not impact the battery.

A few thoughts on the issue, and my opinion only.

Cheers


"When you write the story of your life, don't let anyone else hold the pen"

Ernest

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