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Thread: Charging System QUICK TEST

  1. #21
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    Quote Originally Posted by posplayr View Post
    If you are using a 5 position fuse box , on of these is labeled main and there is no need for another fuse. Also this has nothing to do with quick test. You should start another thread.
    Sorry about ragging onto this thread, wasn't sure if you'd see it... Should I delete these posts and copy them into a new one to keep it clean? Can do if you'd prefer.

    5 position fuse box - that's what I have - so sounds like I'm good, other than a slight drop in voltage at 5k RPM's. I'll double check/clean connections on both the positive and ground sides and make sure everything is tight.

    Thanks again for for this service to all of us GSRers!!
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  2. #22
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    Quote Originally Posted by mikerophone View Post
    Sorry about ragging onto this thread, wasn't sure if you'd see it... Should I delete these posts and copy them into a new one to keep it clean? Can do if you'd prefer.

    5 position fuse box - that's what I have - so sounds like I'm good, other than a slight drop in voltage at 5k RPM's. I'll double check/clean connections on both the positive and ground sides and make sure everything is tight.

    Thanks again for for this service to all of us GSRers!!
    One post is not going to hurt anything. You should still do the revised phase a tests to measure those drops.

  3. #23
    Bizzel Guest

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    Hi there. Thanks for the great information so far. I did the test but I can't figure out whether it's my battery of my charging system (or both?)

    My readings are

    Key off: 12.58
    Key on (w hl): 11.99
    Idle: 12.3
    revving @ 2k: 13.3
    revving @ 5k: 13,2
    Idle: 12.7
    Key off: 12.77

    It does seem to be charging because the voltage is higher after I've let it run for a bit. I have the problem that my bike won't start after it has sat for a while (like a few hours). Any ideas?

  4. #24
    bwanna Guest

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    Quote Originally Posted by Bizzel View Post
    Hi there. Thanks for the great information so far. I did the test but I can't figure out whether it's my battery of my charging system (or both?)

    My readings are

    Key off: 12.58
    Key on (w hl): 11.99
    Idle: 12.3
    revving @ 2k: 13.3
    revving @ 5k: 13,2
    Idle: 12.7
    Key off: 12.77

    It does seem to be charging because the voltage is higher after I've let it run for a bit. I have the problem that my bike won't start after it has sat for a while (like a few hours). Any ideas?

    Seems low.
    1. Check ground connection. I actually ran a separate 12ga wire from the battery ground directly to the regulator ground. The grounding is VERY important.

    2. Check and clean stator/regulator connectors. Oxidation, even slight, can reduce the charging ability.

  5. #25
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    Quote Originally Posted by bwanna View Post
    Seems low.
    1. Check ground connection. I actually ran a separate 12ga wire from the battery ground directly to the regulator ground. The grounding is VERY important.

    2. Check and clean stator/regulator connectors. Oxidation, even slight, can reduce the charging ability.
    The best grounding is as I laid out for Single Point Ground, in this schematic in GS Charging health. You have to collect up 3 ground returns (Harness,Frame,Battery) and then run them to the R/R(-) . The battery is one of them but not the only. SPG should be as close to the R/R as practical.

    http://www.thegsresources.com/_forum...31#post1138531


    The charging results here are in a classic ambiguity zone of low charging voltages (13.2-13.5 is way Too low). I like to confirm whether or not there is any actual power being generated from the alternator or is it just coming from the battery. The change from Step 1 to step 6 (in bold) shows an increase in voltage so we suspect it is charging some. We need to measure the current from the R/R. We can do that one of two ways. 1.) Measure voltage drops between the R/R and the battery(Refer to Revised Phase A tests of the Stator Pages). or 2.) Get an AC current clamp described here.

    http://www.thegsresources.com/_forum...ghlight=stator

    Key off: 12.58
    Key on (w hl): 11.99
    Idle: 12.3
    revving @ 2k: 13.3
    revving @ 5k: 13,2
    Idle: 12.7
    Key off: 12.77
    Once you have that and give a quick clean, you can confirm that it is a contacts problem by doing the Phase A tests in the stator pages. If your are high that is good as it would explain you low charging voltages. Something that can be fixed by properly cleaning (e.g. Naval Jelly ,and DeOxit). If there are no voltage drops (or below 0.05V) then you might have a stator problem. So at this point it is a toss up.

    I have also posted about using a inexpensive clamp on meter here which would be a quick way to test the stator.
    Last edited by posplayr; 08-04-2015 at 03:42 PM.
    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
    Bizzel Guest

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    Thank you guys for the reply. I'll try cleaning the connections & making sure everything is grounded correctly first, that shouldn't be too hard. I'll think I'll get a new battery anyway, since this one is quite old and still doesn't have factory specs after being on the trickle charger for a week..

  7. #27
    Bizzel Guest

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    Too bad, I cleaned the connections & checked the ground and that seemed fine. I also measured the a/c voltages from the stator and they were very low, between 28 and 40 V. So I think the stator is probably bad, sadly. I'm thinking about selling the bike.

  8. #28
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    Why sell it? Post up what kind of a bike you have (place it in your signature) and where you are located. Steve, member here, was selling rewound stators at one point in time and there are many posts about fixing these kinds of issues.

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  9. #29
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    Did my charging system quick test today. This is with the battery right off the tender. Is there a certain amount of time you have to have the bike running? This was done after warming up for 60 seconds.


    Key off: 12.9
    Key on (w hl): 12.2
    Idle: 12.3
    revving @ 2k: 12.3
    revving @ 5k: 12.38
    Idle: 12.38
    Key off: 12.32
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  10. #30
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    Quote Originally Posted by growler View Post
    Did my charging system quick test today. This is with the battery right off the tender. Is there a certain amount of time you have to have the bike running? This was done after warming up for 60 seconds.


    Key off: 12.9
    Key on (w hl): 12.2
    Idle: 12.3
    revving @ 2k: 12.3
    revving @ 5k: 12.38
    Idle: 12.38
    Key off: 12.32
    Battery is good, Charging sucks. I would do the Stator tests Revised Phase B . Measure VAC A.) leg to leg (needs to be about 80VAC) and B>) leg to ground (0 VAC) at 5K RPM.
    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


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