Won't charge on it's own - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 41 (permalink) Old 12-03-2009, 10:54 AM Thread Starter
Senior Member
 
Join Date: Jun 2009
Location: Chicago, Illinois
Posts: 156
iTrader: (0)
 
Send a message via AIM to Acid7711
Won't charge on it's own

Well....I was driving home one day, saw my headlight flicker (was somewhat dusk) was like...wtf? Looked down at my volt meter and it was pulling 12's instead of 14's...

I made it home barelly with it in the 11v range after that I tossed a battery tender on it for the next couple days, 12v+ fired right up.



First thing I did when I got the bike was relocate the rectifier. So, I sat out, tested the 3 yellow wires OFF the rectifier harness, all 3 went up, same voltage, with the revs. I figured because of this, stator was fine.


I figured the rectifier took a crap. Well, my new one came in today, plopped it in, 12v+ off the tender charger, fired up with a little help in this cold weather. Took it around the block...no change. Would NOT get above 12v. I didn't ride it long enough to see if it would drop or stay at 12v.

I measured right at the battery 12v on the nuts...


So, rectifier good/new, stator seems to be good after those yellow wires I tested (I redid all the stator connections and soldered them this summer), battery is a sealed maint free, brand new, obviously holding a charge.

So..tell me the bad news..what's goin on?
Acid7711 is offline  
Sponsored Links
Advertisement
 
post #2 of 41 (permalink) Old 12-03-2009, 01:23 PM
Members who have donated towards server costs
 
Join Date: Nov 2008
Location: Finland
Posts: 369
iTrader: (0)
 
Check that the R/R is getting 12V to the brown wire. If it does, measure the charging voltage right at the regulator output - the white wire. Finally, check the voltage at the black/yellow wire of the R/R - should be close to 0V.
pappa is offline  
post #3 of 41 (permalink) Old 12-04-2009, 08:23 AM Thread Starter
Senior Member
 
Join Date: Jun 2009
Location: Chicago, Illinois
Posts: 156
iTrader: (0)
 
Send a message via AIM to Acid7711
I'll check em when I get home tonight, or later tonight hopefully and get back to you all. The rectifier is brand spankin factory new, so it deff isn't the problem, but I will check those.
Acid7711 is offline  
 
post #4 of 41 (permalink) Old 12-04-2009, 04:57 PM Thread Starter
Senior Member
 
Join Date: Jun 2009
Location: Chicago, Illinois
Posts: 156
iTrader: (0)
 
Send a message via AIM to Acid7711
Yup, all 3 were dead on.


Black (ground) was 0v, middle (monitor) was 12v, and the far end (battery) was 12v too.

I just don't get why I can't get the bike to charge. All the stator wires go up and down with the throttle.


Maybe they aren't pushing enough power???? Stator??? Is there ANYTHING else this could be??
Acid7711 is offline  
post #5 of 41 (permalink) Old 12-04-2009, 07:47 PM
Senior Member
 
Jace Bror's Avatar
 
Join Date: Jul 2008
Location: Prior Lake (MPLS area), MN
Posts: 950
iTrader: (1)
 
The Junction Box (Fuse Box) could be wonky. There is a relay in there, or connection. The power goes from stator to R/R, from R/R to JB, then it goes to the battery. So if you can trace the wire leaving the R/R and check voltage at the R/R.

Sold 750 (9-09)
Bought '07 900 Classic "LT" (6-09)
Mustand Seat (6-09)
Balanced Carbs (4-09)
Adjusted Mix Screws (4-09)
Drilled Baffles 8 holes (4-09)
R/R Relocated (3-09)
Splines Lubed (3-09)
Metzelers ME880 170/80 in back 100/90 in front (3-09)
Painted flat blak (3-09)
Kuri grips (8-08)
Kuri Longhorn pegs (8-08)
Iridium Plugs (8-08)
Highway bar/ engine guard(FS)
Some saddlebags no idea which ones
Facebook group Vulcan 750 Riders (Invite Only Group)
Facebook ID Eli Gaffke
Jace Bror is offline  
post #6 of 41 (permalink) Old 12-05-2009, 03:30 AM Thread Starter
Senior Member
 
Join Date: Jun 2009
Location: Chicago, Illinois
Posts: 156
iTrader: (0)
 
Send a message via AIM to Acid7711
That might make sense, because it was like a 'switch' just clicked and all of a suddden BAM my lights just dimmed and I just knew something wasn't right until I looked at the volt meter.

I'll check that tomorrow. I realize these relays either work or don't, most based on magnets to work. Any real way to check them? pull em and check for the "click" they make?
Acid7711 is offline  
post #7 of 41 (permalink) Old 12-05-2009, 04:10 AM
Members who have donated towards server costs
 
Join Date: Nov 2008
Location: Finland
Posts: 369
iTrader: (0)
 
Quote:
Black (ground) was 0v, middle (monitor) was 12v, and the far end (battery) was 12v too.
Sorry for not being specific, but I wanted you to test the regulator output (at the regulator) with the engine running. 12V is what you would expect with engine stopped, but it should rise to somewhere around 14V when you rev the engine. If not, then the regulator is shot. If the voltage does rise at the regulator output but not at the battery, then you can look for the problem between the regulator and the battery.

You did not tell if the stator voltages between the phases were good.
pappa is offline  
post #8 of 41 (permalink) Old 12-08-2009, 04:41 PM Thread Starter
Senior Member
 
Join Date: Jun 2009
Location: Chicago, Illinois
Posts: 156
iTrader: (0)
 
Send a message via AIM to Acid7711
The sator voltages rise and fall with rps, if they're in the correct values, i'm unsure. I have to get in in there to replace the leaking oil gasket anways so i'm probably going to just replace the damn stator while I'm at it.

Like I said, the rectifier I got (thinking it was the original problem) is a 100% brand new factory rectifier. It can't be the problem. Not when two rectfieries (old and new) are reading the exact same outputs at all wires... No chance in that, the problem MUST rely somwhere else....

Sadly at this point, I think the stator is working enough to provide "readings" on my voltmeter, but not enough to charge the bike.


I remember my rectifier used to get hot to the touch, it's cold as ice now, even with the brand new one : /
Acid7711 is offline  
post #9 of 41 (permalink) Old 12-08-2009, 05:53 PM
Members who have donated towards server costs
 
denny6006's Avatar
 
Join Date: Mar 2009
Location: InezKY pop.600
Posts: 5,236
iTrader: (9)
     
Garage
the stator voltages should be from the 50 to 70 volt AC range when read phase to phase on all combinations of the three phases if it is much lower than that or if any phase of the stator shows continuity between it and ground on the engine case the stator is probably bad,remember to check the stator voltage on the ac scale and regulator,output on dc




If you see it on my bike I did it
VROC#30324
92 vn750(sold)
Current ride 05 1500 Classic FI
lovin' the new scoot



Quote:
"When all is said and done,usually more is said than done" UNK
Click on one x and drag to the other to read between them.

Psalm 40:1...
XI waited patiently for the Lord; and he turned unto me, and heard my cry. X
denny6006 is offline  
post #10 of 41 (permalink) Old 12-09-2009, 01:50 AM
Sparky!!!
 
slimvulcanrider's Avatar
 
Join Date: May 2008
Posts: 8,695
iTrader: (3)
   
Garage
sounds like the JB
slimvulcanrider is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Once registered, your User Name"cannot be changed". We can make exceptions within 7 days, but after that, it is set in stone.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome