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Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

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  Topic Review (Newest First)
07-19-2006 07:11 PM
global_recon oh hell yea! check it out:

Attachment 72

i installed the new regulator today (well, plugged it in anyway)... and the battery voltage is 14.5v when the engine is at 5000rpm. i think that does it!

a few things...

1. thanks to everyone who provided input here... i REALLY appreciate it.

2. now that i solved (well, hopefully) this problem i feel so much more confident working on my bike. yes it took some time, but i saved money and i'm much more knowledgeable about the vn750's electrical system.

3. martin/mushu... if you have time and the inclination, i'd still be interested in seeing what you did with the wires going to the R/R.

4. i'm most likely going to relocate the R/R as advised by this group and i think i may also fuse the stator leads (saw the recent post that 7.5 amp fuses would work best). will these fuses prevent the biggest cause for stator failure?

thanks again everyone!
07-17-2006 07:05 PM
global_recon
Quote:
Originally Posted by cegodsey
I'm just guessing at this, but there is a chance that the fault.pdf is referring to voltages much greater that .2V.
i thought about that as well... that's what i'm hoping.

Quote:
Originally Posted by cegodsey
What gauge wire is it?
i can't find the gauge written on the wire... i'd guess 14.

Quote:
Originally Posted by Mushu
I'll post some photos later today so you can see what I did to fix this problem... check back later and I hope this helps...
that would be fantastic, martin. i'd appreciate it.
07-17-2006 06:41 PM
Mushu I'll post some photos later today so you can see what I did to fix this problem... check back later and I hope this helps...

Martin
07-17-2006 04:41 PM
cegodsey GREAT NEWS! Don't drive it until you get the new r/r. And if for some reason you have to, disconnect the r/r.

I'm just guessing at this, but there is a chance that the fault.pdf is referring to voltages much greater that .2V.

As to following the diagram, it looks like there are a couple of connectors between the r/r and the ignition switch. One is for the rear brake light switch and junction box, and the other is front brake light, tach, and horns. Chances are that the extra resistance is coming from a connector, Although that value is low enough it could just be excess low gauge wiring. What gauge wire is it?
07-17-2006 04:23 PM
global_recon here's the latest:

after removing, cleaning, and reinstalling the ignition switch (completely stripping and breaking off one of the tiny screws that holds it in place... DO NOT OVERTIGHTEN THESE SCREWS) as well as cleaning all of the electrical connections right in front of the gas tank, the reading from the switched input of the R/R and the positive battery came down to .59V (from yesterday's reading of .84V). so, i'm making some progress... but i'm still not down to the .2V that the fault finding pdf stipulates. as a recap, i'm measuring the voltage between the switched lead of the R/R to the positive battery terminal.

cegodsey ['did you follow the wire to see what voltages at what places? That should tell you where the extra resistance is.']: the brown wire (switched lead) that comes out of the R/R disappears into the main bunch of wires and heads up towards the headlight. i can't really make sense of the electrical diagram in the manual, but it looks like it re-emerges in a connector in the headlight enclosure... tried a reading there and got .62V. are there other place i can measure?

mushu ['Check the resistance of the cables between the R/R and the juction box']: thanks for the suggestion... but again, i'm having difficulty tracing those wires. the positive and negative R/R wires disappear in the main bunch of wires and i head up to the headlight. it doesn't look like those wires go right to the junction box. which wires exactly did you replace?

one other bit of positive news... i checked the AC volts coming off the stator leads and i'm getting 78-80V across all three leads when the engine is running at 5000rpm. given that and my resistance readings, i'm assuming the stator is fine. i ordered a new R/R which should be here wednesday. if i can just get that switched lead of the R/R to the positive battery terminal down to .2V i'm hoping i'll be good to go.

thanks to everyone who has responded so far... really appreciate it.
07-17-2006 11:14 AM
Mushu Another likely sourse of the resistance is the cable itself, specially those near heat sources such as the R/R. Check the resistance of the cables between the R/R and the juction box, both the positive and the ground cables coming from the R/R are a bit small for the rated current of the charging system.
My 93 Vulcan requiered a splice of new cable between the positive lead of the R/R to the juction box and from the ground lead of R/R to the ground post of the battery.
Doing this eliminated all the parasitic power loss on the cables.
Hope this helps
07-17-2006 03:41 AM
global_recon
Quote:
Originally Posted by cegodsey
Hopefully.

I read thru the Fault pdf file; did you follow the wire to see what voltages at what places? That should tell you where the extra resistance is.
no... but that's a good suggestion. i'll do that tomorrow (er, today) after i reinstall the ignition switch. thanks!
07-16-2006 11:53 PM
cegodsey Hopefully.

I read thru the Fault pdf file; did you follow the wire to see what voltages at what places? That should tell you where the extra resistance is.
07-16-2006 04:53 PM
global_recon thanks hyperbuzzin. i removed the ignition switch today (thanks for the link to the vulcan verses post)... cleaned it really well... and will reinstall tomorrow. hopefully that does the trick.
07-15-2006 08:21 PM
hyperbuzzin There is a post in the Vulcan Verses about the ignition switch.
You can check it out HERE.
Sorry I can't be of more help to ya on this.
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