Charging issues on my '89 VN750 today... - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
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post #1 of 55 (permalink) Old 10-13-2012, 08:20 PM Thread Starter
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Charging issues on my '89 VN750 today...

Well, that was an interesting day. Went for a motorcycle ride with a friend. We headed up I-575 till well after it stopped being an interstate, and planned to take Highway 136 east for a nice leisurely ride. A few miles on 136, and my bike starts acting squirrely. I pull over to see what is going on, and can't get it to start up again. Battery is too low.

Larry found a bike shop just down the road and they came and gave me a jump. Headed back the way we came. Got about 10 miles down the road and it started getting worse. Completely died just as we pulled into the parking lot of an Advance Auto.

Battery was pretty much toast at that point. Supposed to have like 250 cold cranking amps...had maybe 53 according to their test machine. So, bought a new battery. Was about due anyways. $80 later and we're on our way back. Wasn't sure if it was a battery gone bad, or the charging system dying on me, so I had cut the wire to the headlight, and also disconnected the GPS charger. Made it back home just fine, with even more charge on the new battery than when I put it in. Hmmmm...

Hooked everything up and took it back out to go grab food with Larry. Seemed to work just fine. Voltmeter is showing it around 10 and a half volts...supposed to be 12, but it has always been like that with the headlight on. So...still dunno...bad battery or bad charging system?

What say you, oh denziens of VN750.com? Was it the battery gone bad? Has the stator fried? The R/R gone out? What do I need to check, and how? Thanks!

.
.
.
-Az
http://www.asbrand.com

1989 Kawasaki Vulcan 750

Upgrades so Far:
Coastered
R/R relocated
Analog Voltmeter
PFIII Windshield
RAM GPS Mount w/Garmin GPS
Cigarette Lighter Power Adapter
Saddlemen's Classic Explorer Seat
Pro-Tac Driver's Backrest
LED Tail Light
LED Rear Turn Signals
Luggage Rack
Storage Trunk
Engine Guard w/Highway Pegs
Radiator Grill Cover
Turn Signal Relocation Bracket
Saddlebags
Floorboards
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post #2 of 55 (permalink) Old 10-13-2012, 08:25 PM
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running it should be above battery voltage roughly 12.5v, when reving it it should be 13.5+

2010' voyager

2005 1600 nomad sold

1987 kawasaki vulcan 750 SOLD

1985 kawasaki vulcan 700 parts bike maybe
lots of hand guns
3 cagers doors kicked in
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post #3 of 55 (permalink) Old 10-13-2012, 08:38 PM
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Check your battery grounds. If able change out the regulator.

02 honda sabre 1100
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post #4 of 55 (permalink) Old 10-13-2012, 08:41 PM
..have a vulcan good day!
 
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Quote:
Made it back home just fine, with even more charge on the new battery than when I put it in. Hmmmm...
Battery fine here...charging system must be ok.
You hooked Headlight and other electronics back up...now problems ?

First Check:
Look for bad/crappy electrical connections in your charging system (failing under load).
or
Your Headlight /other electronics bad wiring/shorting out ?

check it out

WilliamTech

'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #5 of 55 (permalink) Old 10-14-2012, 10:07 AM
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I suggest covering the bases first....or at least while you look for bad/dirty connections. Even if you clean up the wiring and you think it is working fine, I would suggest doing the tests anyway:

http://www.scribd.com/doc/88523705/V...ystem-TS-Guide

download the form that Slim made and fill it out completely and post your results. This will give a LOT of good info on what the whole charging system is doing, and maybe pinpoint the issue to either the Stator, the Regulator, or other stuff.

If you run on a bad or low battery, it is possible that the stress of constant charging would have damaged the R/R or the Stator.

Fill out the worksheet and we can guide you in the right direction.
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post #6 of 55 (permalink) Old 10-14-2012, 02:25 PM Thread Starter
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I'll do that either this evening or tomorrow.

Looking at that sheet...I'm not really sure what that top drawing is? It isn't clear? Is that one of the connectors on the side of the fuse box?

.
.
.
-Az
http://www.asbrand.com

1989 Kawasaki Vulcan 750

Upgrades so Far:
Coastered
R/R relocated
Analog Voltmeter
PFIII Windshield
RAM GPS Mount w/Garmin GPS
Cigarette Lighter Power Adapter
Saddlemen's Classic Explorer Seat
Pro-Tac Driver's Backrest
LED Tail Light
LED Rear Turn Signals
Luggage Rack
Storage Trunk
Engine Guard w/Highway Pegs
Radiator Grill Cover
Turn Signal Relocation Bracket
Saddlebags
Floorboards
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post #7 of 55 (permalink) Old 10-14-2012, 03:24 PM
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no, its the connector on the R/R.. it should be under the battery facing the left side of the box just under the Junction Box.
and the picture is upside down compared ot how the r/r is on the bike... so if you just unplug the connector, remember picture needs to be turned upside down to match
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post #8 of 55 (permalink) Old 10-14-2012, 05:54 PM
..have a vulcan good day!
 
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Quote:
the picture is upside down compared to how the r/r is on the bike... so if you just unplug the connector, remember picture needs to be turned upside down to match
_______
....do you always draw upside-down ?

LOL

WilliamTech

'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #9 of 55 (permalink) Old 10-14-2012, 06:36 PM
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took it right off the manual.. and its only upside down when on the bike because the R/R is mounted upside down.
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post #10 of 55 (permalink) Old 10-14-2012, 06:58 PM
..have a vulcan good day!
 
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Quote:
Originally Posted by slimvulcanrider View Post
took it right off the manual.. and its only upside down when on the bike because the R/R is mounted upside down.

I understand....
You did not draw it .

WilliamTech

'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
WilliamTech is offline  
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