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Thread: Electrical woes - low voltage, starting issues, etc.

  1. #21
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    Quote Originally Posted by Gorminrider View Post
    looking at the pictures, you have a lot of funk from a previous owner...the 20 amp fuse at headlights indicates they had trouble on that circuit and the larger fuse may have exacerbated them.

    The motorcycle's original ground system had the thick cable attached to the engine, with two smaller ground wires (Black/white stripe) coming out of the harness -one at front one at rear-attached to the frame...(NOT the forks) The added one...I can't swear to it per your "L" without looking at the particular diagram but my gs650G has no such thing and it sure looks like "funk" to me....perhaps the PO chopped the other off at the harness.

    The battery box is not the worst place to connect a (B/W) ground wire but connection should be rust free under a tight bolt...

    You can disconnect one fuse at a time and see if that helps your large voltage drops...and thereby narrows down bad circuits.

    Your regulator and stator are suspects. The old originals could blow SCR or diodes and allow power BACK into a stator. Which is pretty close to a dead short at the MAIN 15amp fuse, but not always.... Disconnect the regulator and see if that helps- the bike can run on a battery alone for a little while.

    ABOVE ALL consult your wiring diagram and try to figure out what the Previous owner was "fixing" with the additional? wires and black tape. Black tape can be ok for ceertain purposes but good 3m black tape will not unravel so easily and is worth the xtra $...

    A coloured wiring diagram can help. go here
    http://members.dslextreme.com/users/...650wiring.html

    Thanks. I completely agree with your assessment. Some of this stuff just seems so weird and it's hard for me to know what was hacked and what is original, since I've only ever worked on this one bike (no frame of reference). This bike definitely seems to have had a fair share of hacking from previous owners. I am going to try all of your suggestions.... looking at the wiring diagram now it appears that the original frame grounds come out near the headlights and tail lights? I will look for those. I would like to eliminate that extra ground wire if I can - assuming the original grounds are still in tact and it's safe to do so?

    New fuses are arriving today. I will try playing with those.

    I'm still learning how to use the multi meter. My next goal will be to figure out how to actually trace where voltage is being lost. Electrical circuits confuse me but... the more I read the more it is setting in haha
    ------------------------------------------------
    1982 GS650L
    2020 Triumph Speed Twin

  2. #22
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    I checked the voltage at the fuse box. Finally found a video that helped me understand how to do that - I placed the negative lead on the negative battery terminal, then probed each end of all the fuses with the positive lead. I read 12.7v at the MAIN and POWER fuses - the ones that are supplied by the red wire feeding the fuse block. All of the other fuses were dead, no power. Now - what are the next steps to try to trace where I'm losing power? I feel like I'm missing something silly if they are all dead...?
    ------------------------------------------------
    1982 GS650L
    2020 Triumph Speed Twin

  3. #23
    posplayr's Avatar
    posplayr is offline Forum LongTimer GSResource Superstar
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    The only fuse that is HOT with key OFF is the Main.

    You need to turn on the key to power all other circuits.

    This is all self explanatory in the factory schematic.
    Read about Charging Quick Test GS Charging Health GS Stator

    "The smallest giant of mankind, is he who stands on the shoulders of a larger giant who himself stands on the shoulders of yet a larger giant, and therefore sees the most light from GOD." Posplayr 2017 adapted from : Bernard of Chartres


  4. #24
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    Quote Originally Posted by posplayr View Post
    The only fuse that is HOT with key OFF is the Main.

    You need to turn on the key to power all other circuits.

    This is all self explanatory in the factory schematic.
    OK - got it. with the key on i have voltage at all fuses. unfortunately not sure how to troubleshoot from here. I'll keep studying I guess and hopefully something will dawn on me. Thanks for all the help so far. Bummed because I have no idea how anything I did would have wound me up here... I thought I was only making improvements but I must have upset something that was just on the edge... maybe a short somewhere in a wire near the battery area, idk. Clearly something got moved or nudged just enough to kill it... the fact that I've seen this behavior once or twice before makes me feel like that is probably the case, it just kinda corrected itself before.
    ------------------------------------------------
    1982 GS650L
    2020 Triumph Speed Twin

  5. #25
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    Especially now that you say you have the fuse box hot, I would guess you lost a ground.

    There are usually two ring lugs on the B/W connected to the harness. This is the backbone of the grounding for all devices connected to the harness.

    You have to have at one of these B/W Ring lug at a common point on the metal side cover (under solenoid mounting bolt) or where your R/R is mounted to include:


    • B/W Ring Lug
    • Battery (-)
    • R/R (-)
    • FOR GOOD MEASURE Frame ground.


    If you do this, that is a Single Point Ground (SPG). It also happens to be the picture I posted before.

    The other B/W ring lug is typically going to the front of the battery box to pickup return currents from the battery box (if used as a ground).
    Read about Charging Quick Test GS Charging Health GS Stator

    "The smallest giant of mankind, is he who stands on the shoulders of a larger giant who himself stands on the shoulders of yet a larger giant, and therefore sees the most light from GOD." Posplayr 2017 adapted from : Bernard of Chartres


  6. #26
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    Cool, I will have some time to spend a little quality time tonight. I am going to try to locate all these ground wires and see if I can reproduce what you're saying. I may also take a video or something to show you how everything is set up on my bike once I have an understanding of exactly what I'm looking at. I think that will help the conversation, because it's pretty clear that a few things have been changed by the PO and they are tripping me up a bit.

    Quote Originally Posted by posplayr View Post
    If you do this, that is a Single Point Ground (SPG). It also happens to be the picture I posted before.
    I see a link that you posted to (which I am studying), but I don't see any pictures in that thread or in this one? Pictures would definitely be helpful. But your descriptions are very good, I will do my best to follow them.

    Finally, in your thread regarding the SPG approach - you mention using 14 AWG wire for the ground wires "all less than 1' using 14 AWG ground wire"
    Is it okay to use 16 AWG? It's what I have on hand. Happy to go buy some 14 AWG if that is best but figured I would ask the question.
    ------------------------------------------------
    1982 GS650L
    2020 Triumph Speed Twin

  7. #27
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    Read about Charging Quick Test GS Charging Health GS Stator

    "The smallest giant of mankind, is he who stands on the shoulders of a larger giant who himself stands on the shoulders of yet a larger giant, and therefore sees the most light from GOD." Posplayr 2017 adapted from : Bernard of Chartres


  8. #28
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    Sorry, I must be missing something or misunderstanding you. That is the post I was referring to but I don't see any photos, in that post or in the post you link to from there... something glitchy with forum images in my browser? idk...

    here is what i see:

    Untitled.jpg

    If i check the source in the browser devtools I can see there is an <img> tag there pointing to:

    http://www.thegsresources.com/_forum/picture.php?albumid=1998&pictureid=10607

    But that returns a 1x1 pixel image...

    Edit: is it possible that the album you are linking to is some kind of private album I don't have permissions to see? Do I need to be your friend or something?
    Last edited by exzachtly1; 07-09-2020 at 12:56 PM.
    ------------------------------------------------
    1982 GS650L
    2020 Triumph Speed Twin

  9. #29
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    Must be your browser. I logged out and see everything Win7 chrome.
    Read about Charging Quick Test GS Charging Health GS Stator

    "The smallest giant of mankind, is he who stands on the shoulders of a larger giant who himself stands on the shoulders of yet a larger giant, and therefore sees the most light from GOD." Posplayr 2017 adapted from : Bernard of Chartres


  10. #30
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    Quote Originally Posted by posplayr View Post
    Must be your browser. I logged out and see everything Win7 chrome.
    Damn, I've tried firefox, chrome, edge, and internet explorer on two different computers and also on my phone, I don't see images on any of them (logged our or logged in).

    Try an incognito window without being logged in? Maybe they are cached for you somehow?

    Can anyone else confirm whether they see images in that post? It sure would be helpful to be able to see these
    ------------------------------------------------
    1982 GS650L
    2020 Triumph Speed Twin

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