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Thread: Been gone long time, stator question

  1. #31
    Senior Member Gloomshadow's Avatar
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    wait a min, connectors on a sportser and a XB are different I was checking off the 2 pin connector.. the manual says check output and resistance off a 3 - pin connector so I guess I was getting that 26v off the wrong wire... I gotta check that 3 pin connector instead and see what it says.. I'm thinking this is a bad stator

  2. #32
    Senior Member Gloomshadow's Avatar
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    ok I was on the wrong connector.. I'm on the 3 pin connector and all combos of 1 , 2 and 3 give 20V at idle then jumps up to 30-something at 2000 rpm and around 50V at 3000 rpm.. I don't see why that isn't enough power to charge ...

    so Stator is coming back as good, its a new VR and my relays are good.... why only 12.5V across the battery terminals???? what could it be? a ground somewhere? a dirty connector??

    cleaned my ground in the tail, no change. I got a bad brake light switch I got the switch and everything but haven't swapped it out yet..i can't imagine it would be that..
    Last edited by Gloomshadow; 11-26-2023 at 09:52 PM.

  3. #33
    Senior Member Gloomshadow's Avatar
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    I'm getting confused.. at rest , reading across my battery terminals is 13.1V.. at idle its 12.6V if you rev it up to 4000rpm it doesnt go up much maybe 12.7V... some guys are saying the battery is being charged at 12.4V other guys are saying it's around 13.5 volts... is 12.6V at the battery while at idle enough to charge this battery?
    Last edited by Gloomshadow; 11-27-2023 at 03:12 AM.

  4. #34
    Senior Member Barrett's Avatar
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    Quote Originally Posted by Gloomshadow View Post
    I'm getting confused.. at rest , reading across my battery terminals is 13.1V.. at idle its 12.6V if you rev it up to 4000rpm it doesnt go up much maybe 12.7V... some guys are saying the battery is being charged at 12.4V other guys are saying it's around 13.5 volts... is 12.6V at the battery while at idle enough to charge this battery?
    is 12.6V at the battery while at idle enough to charge this battery?

    NO


    Your initial "stator check" was incorrect....then you figured it out. You are looking for COMPLETE CONTINUITY in all 3 fields...then total alternator/stator output in AC volts. Your stator is fine.

    Seek local Sportster tech help. Probably a faulty out-of-box Ebay VR. Simply plug in a known good 03-07 VR and solve this.

  5. #35
    Senior Member Gloomshadow's Avatar
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    I didn't do continuity, just saw that the output was good , I figured the continuity was just to isolate if the stator or rotor was bad.. and if total output was good then it was all good. No?

    I just got some contact cleaner, to clean things up.. I went back to old posts and saw that some guys had symptoms like this and it was dirty connectors. I'll try that first.. I got a good VR on my 07, I could plug that one in and check if the connectors are the same
    Last edited by Gloomshadow; 11-27-2023 at 05:08 PM.

  6. #36
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    Quote Originally Posted by Gloomshadow View Post
    I didn't do continuity, just saw that the output was good , I figured the continuity was just to isolate if the stator or rotor was bad.. and if total output was good then it was all good. No?

    I just got some contact cleaner, to clean things up.. I went back to old posts and saw that some guys had symptoms like this and it was dirty connectors. I'll try that first.. I got a good VR on my 07, I could plug that one in and check if the connectors are the same
    Yeah I need to apologize for not having you circle back to ensure you're following all the troubleshooting steps. Barrett is correct - ANYTIME you are troubleshooting ANYTHING, especially electrical, you MUST follow a systematic, step-by-step procedure, to ensure that you are eliminating each component.

    Think if it like a series of gates you have to pass thru before getting to the next. You cannot skip. Again, I'm sorry for adding complexity to the thread.

    Now, back to your testing! :P

  7. #37
    Senior Member Gloomshadow's Avatar
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    but continuity shows why the stator isn't putting out power.. mine IS putting out the power it needs so continuity is ok, or that was my understanding of the test..

  8. #38
    Senior Member Gloomshadow's Avatar
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    ,I'm gonna try and plug in my VR that's on my 07 and if it fixes it we will know..

  9. #39
    Senior Member Gloomshadow's Avatar
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    sonofabitch ... I plug in my old VR before pulling the one off my 07 and the old one is charging at 14.4 V.... plug in my new eBay copy and it's 12.5l... plug in my old buell VR and 14.4!! must have been a dirty connector????

    yeah it's back together with my old VR .. no problem. 14.3 volts at the terminal while running. Can a VR be "intermittent"???
    Last edited by Gloomshadow; 11-27-2023 at 10:58 PM.

  10. #40
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    I haven't been on for while but looking through your saga here I would be inclined to suspect the dear old 77 connector that is the DC output of the earlier VR.
    They definitely can get a carbon buildup from arcing in spread female sockets that effectively insulates one of the pis from connecting to the battery.
    The action of reseating the connector can clean this up partially resulting in an intermittent operation.
    I had this exact failure on my '06 Uly and after much screwing around with the dealer at the time (still under warranty in the good old days), I eventually found the issue and documented it at the time.
    There are all sorts of ways to resolve this but assuming the connector hasn't heated to the point of wrecking the plug I would simply clean the sockets (properly) and reform them as required.
    I did that on my Uly and the original connector was still functioning 40,000 miles later when I parked it.

    An old version the document I put together at the time is still there in Google docs (page formatting is a bit off but the required info is there):

    https://docs.google.com/document/d/1...vXEJcIIjEVFycw

    The VR has quite a few electronic components so an intermittent internal failure is definitely possible but this check of the connector sockets is relatively easy so can't hurt to try.


    Just remember:
    1.The 77 connector is connected to the battery via the 30A fuse so is effectively 'hot' with the ignition off so definitely disconnect the battery before attempting this.
    2.Take carful note of which of the two black wires from the VR is connected to the red positive lead in the bike loom before removing any sockets (I would suggest doing one at a time to prevent any SNAFUs).
    3.The small release tangs do not need to be pushed too far - just enough to release them. If you bend these too far then there is a good chance they will break off when bending them back - not what you want.

    Ray



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