charging problem - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

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post #1 of 5 (permalink) Old 06-08-2008, 09:30 PM Thread Starter
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Unhappy charging problem

i have 86 vulcan that don't keep the battery charged i did all the tests they all are good but it still don"t charge. i've notice the ground wires get real hot do they normaly get hot and if not could this be the reason the battery is not charging.
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post #2 of 5 (permalink) Old 06-08-2008, 09:56 PM
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First check the rectifier. It could be bad..(batteries don't much like receiving alternating current) then try cleaning your ground connections both at the battery and the frame.
And make them tight and clean. If this doesn't help then look for a short (+wire melted and partially touching metal) failing that ...look at replacing the battery (bad cell)

2010 Triumph Speedmaster
1995 Vulcan750
1989 XT350
1959 M38A1

Last edited by kay; 06-08-2008 at 10:03 PM.
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post #3 of 5 (permalink) Old 06-09-2008, 01:17 PM Thread Starter
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frist of all thanks kay i thought i did all of the test but i tested r/r ground wire while it was running and it was putting out 5.2 v . but the guy that i bought it from cut the plug wired it individual wires the clymer book i have shows the diagram but witch one is witch a1 a2 a3 iknow them then it has g,m,b on the bottem row is g - ground m - ? b - battery may the guy before me got them backwards .. maybe i shouldn't have bought it but it was just 700$ and it runs good carbs a little dirty but this dang charging problem
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post #4 of 5 (permalink) Old 06-09-2008, 02:13 PM
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a1,2,3 are the yellow wires from the stator. B, battery, is the white wire. M, monitor, is the brown wire (switched power). G, ground, is the black wire.

Wayne, NJ
1989 VN750-A5
VROC #27781
-Replaced/Fused Stator & Replaced/Relocated R/R (15K mi.)
-MF Battery
-Splines Lubed
-Stebel Nautilus Horn
-AutoMeter 2" VOM
-Silverstar Headlight
-Refinished Gauge Rings and Mirrors(Flat Black)
-Refinished Swingarm/Lubed Pivots
-K&S Turn Signals Clear Cover/Amber Bulb
-Kenda Kruz 110/90-19 front 170/80-15 rear
-Clear Alternatives LED tail light
-Plexifairing III
-Willie & Max Saddlebags and SissyBar Bag
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post #5 of 5 (permalink) Old 06-09-2008, 07:41 PM
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A 1,2, and 3 can be plugged in in no particular order as it is 3 phase AC. The R/R smooths this to DC and regulates it for the bike to run and charge the battery.

Jim W
93 VN 750 "Ursula"
Moved R/R 08Sep06
R/R rewire 17Feb07
New R/R, Installed 14Jun08
New Stator installed 10 Jun08
Maintenance Free Battery 12Jan08
21480 Miles
VROC #8542
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