Stator, R/R, Jb, Battery Questions - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 20 (permalink) Old 07-08-2014, 02:08 AM Thread Starter
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Stator, R/R, Jb, Battery Questions

I own two of the Vulcan 750s. One is a 1993 and the other is a 1999. The 1999 battery is not charging. I also have swapped the JB on both bikes, swapped both R/Rs and swapped batteries. The 1999 is still not charging the battery and the volt meter shows no rise in voltage to the battery when the rpms go up. I have charged both batteries with my battery tender before running any tests. I have pulled all the fuses (except the main 30 Amp fuse) and the voltage still does not rise with increased rpms. I have tried moving the blue wire in the JB box and same results, no voltage increase. I have also replaced the ignition switch on the 1999.
Stator(s) is putting out up to 65 volts AC on both bikes (disconnected from the R/R) and no shorts or grounds or opens. Stator(s) seems to be fine. Both R/Rs seems to be good. The 1993 Vulcan is charging great and no problems with it. I would think just swapping out parts on the good charging 1993 to the 1999 would help locate the bad item !
I have cleaned all terminals (pins) and such for all the connectors and all looks good. No burned wires and no burned connectors or connections.All battery connections have been cleaned and all possible grounds cleaned.
I have read many many of the trouble shooting pointers given here on the forum and done all the trouble shooting that can be done. Im at a loss here guys. Chime in with your ideas !


Vulcan #1 1993 - 28K
Vulcan #2 1999 - 26k
It All Comes Down To 3 Things:
#1 Fuel
#2 Spark
#3 Mechanical
Any One Fails - Then It Dont Run

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post #2 of 20 (permalink) Old 07-08-2014, 06:19 AM
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post #3 of 20 (permalink) Old 07-08-2014, 08:03 AM
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Quote:
Originally Posted by OldHipWesTex View Post
I own two of the Vulcan 750s. One is a 1993 and the other is a 1999. The 1999 battery is not charging. I also have swapped the JB on both bikes, swapped both R/Rs and swapped batteries. The 1999 is still not charging the battery and the volt meter shows no rise in voltage to the battery when the rpms go up. I have charged both batteries with my battery tender before running any tests. I have pulled all the fuses (except the main 30 Amp fuse) and the voltage still does not rise with increased rpms. I have tried moving the blue wire in the JB box and same results, no voltage increase. I have also replaced the ignition switch on the 1999.
Stator(s) is putting out up to 65 volts AC on both bikes (disconnected from the R/R) and no shorts or grounds or opens. Stator(s) seems to be fine. Both R/Rs seems to be good. The 1993 Vulcan is charging great and no problems with it. I would think just swapping out parts on the good charging 1993 to the 1999 would help locate the bad item !
I have cleaned all terminals (pins) and such for all the connectors and all looks good. No burned wires and no burned connectors or connections.All battery connections have been cleaned and all possible grounds cleaned.
I have read many many of the trouble shooting pointers given here on the forum and done all the trouble shooting that can be done. Im at a loss here guys. Chime in with your ideas !
Unless I'm missing something here, it has to be R/R related. Your stator is putting out good voltage. If it were me I would replace the wires from the stator bullet connectors to the R/R. I assume you're getting the readings from the bullet connectors. If I still didn't get around 13 volts to the battery I would replace the wires from the R/R to the battery, wiring them directly to the battery. If you still don't get 13 volts then it has to be the R/R. JMO

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post #4 of 20 (permalink) Old 07-08-2014, 10:57 AM
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Sounds like a bad frame to engine ground

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post #5 of 20 (permalink) Old 07-08-2014, 12:47 PM Thread Starter
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Thanks JM2001 i will give your idea a try.
Thanks Slimvulcanrider i will give your idea a try also.
Updates as i proceed with this troubleshooting


Vulcan #1 1993 - 28K
Vulcan #2 1999 - 26k
It All Comes Down To 3 Things:
#1 Fuel
#2 Spark
#3 Mechanical
Any One Fails - Then It Dont Run

____________________________________

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post #6 of 20 (permalink) Old 07-08-2014, 06:04 PM Thread Starter
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Checked all engine grounds, nice and clean and tight. Engine ground cables seems to be in great shape. Cut the output wire on the R/R (white wire) and checked for R/R output voltages. As rpms increase so does the R/R voltage output. I saw up to about 25 volts output on the wire. Hooked cut R/R output wire directly to the (+) battery terminal. No change in battery charging or a higher voltage. This was also done with the 3 ten amp fuses removed from the JB. Reinstalled the 3 fuses. Still no charging!
NOTE: Also checked the amperage being pushed to the battery + terminal and it was around 1.8 to 2 amps. Have a good Fluke digital meter so im sure the readings are correct.


Vulcan #1 1993 - 28K
Vulcan #2 1999 - 26k
It All Comes Down To 3 Things:
#1 Fuel
#2 Spark
#3 Mechanical
Any One Fails - Then It Dont Run

____________________________________

ANTICIPATED MODS:
Build Fiberglass Fenders F/R
Mold & Cast New Turn Signals Lights
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post #7 of 20 (permalink) Old 07-08-2014, 06:55 PM
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You have tested both stators, all connections and swapped r/r, right. I would swap batteries. It sounds like the only thing left.
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post #8 of 20 (permalink) Old 07-08-2014, 07:34 PM Thread Starter
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Yep swapped batteries also Same results Both stators and R/Rs are working.


Vulcan #1 1993 - 28K
Vulcan #2 1999 - 26k
It All Comes Down To 3 Things:
#1 Fuel
#2 Spark
#3 Mechanical
Any One Fails - Then It Dont Run

____________________________________

ANTICIPATED MODS:
Build Fiberglass Fenders F/R
Mold & Cast New Turn Signals Lights
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post #9 of 20 (permalink) Old 07-08-2014, 09:58 PM
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OK time for the dumb question... What is your battery voltage before testing, and what is your charging voltage when hot? Did you use my troubleshooting chart?

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post #10 of 20 (permalink) Old 07-09-2014, 02:49 AM
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your in waco? if ya can get the bike to me we can figure it out one way or another im in celina tx north of frisco give me a call if its an option

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