Help- No Power - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

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post #1 of 18 (permalink) Old 08-16-2006, 05:14 PM Thread Starter
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Help- No Power

Something odd just happened. Was testing out my cooling fan switch, and also the temp gauge. Both worked good. After hooking up the wires. Went to start bike, it clicked and sounded like a blown fuse. Checked fuses, all good, even replaced them to be safe. Still now power at all. Going to borrow a multimeter and check the voltage in the junction box. Did notice one think, the flasher relay behind the battery is in pretty rough shape, unplugged and tried, but still no power.

Pulling my hair out here, anyone know what I did wrong?

Started with cooling gauge not working, it was intermittent then stopped. Then fan also quit turning on at stoplights, yesterday was hot and never turned on once.

Help.......
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post #2 of 18 (permalink) Old 08-16-2006, 05:21 PM
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check the plugs going into all compnets....corrosion grow rapily there.

'04 Vn750
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nat'l cycle deflector shield
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post #3 of 18 (permalink) Old 08-16-2006, 05:48 PM Thread Starter
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I think I found the culprit. Behind the battery on the left side top, there is black and yellow wire with a factory splice on it. When I wiggled the wire, power came back on but not enough juice to start, cut the splice out and respliced it with household splice till I can get a bullet splice from the store and starts up now. Still no coolant gauge though, unsure about the fan, will find out after I take it for a ride.
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post #4 of 18 (permalink) Old 08-16-2006, 07:16 PM
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That's the same wire that drove InsuredDisaster to the brink. It's the ground wire for everything on the bike.

To find out if the fan itself is shot, disconnect the fan switch at the bottom left side of the radiator, and touch the wire to a bolt on the frame (ground). If the fan starts, then the fan is OK.

The fan and the coolant gauge or not connected. The coolant gauge hooks to a temp sensor at the thermostat.

2000 A16
Drilled baffles
$65 leather saddle bags
Kuryaken grips
relocated R/R
de-badged
25,000+ original owner miles
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post #5 of 18 (permalink) Old 08-16-2006, 09:44 PM
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Another test for the fan motor is to hook it up to a separate 12v power source. Mine won't run if I just ground it against the frame because the relay in the junction box is blown. At least I know the fan motor is good. I'm going to bypass the relay and make it a manual switch so I can control when it comes on.
I haven't needed it yet even in our 96 degree plus weather down here as I ride on freeway type roads.

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
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post #6 of 18 (permalink) Old 08-16-2006, 09:50 PM Thread Starter
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This bike is Possessed!!!!

Well after fixing the wire, took it for a ride. Was doing about 50, then wham!! it felt like I was starving for gas, I knew that feeling to well since I had it once before (before I cleaned the carbs). The bike died right in front of an AutoZone (how conveniant for me). So I went inside, bought some seafoam, and some gumout. Cleaned out the drain bowls with the gumout a few times, did the on and off trick with the gas tank. It still ran like crud, finally was able to barely run it around their parking lot, and decided to limp it on the 2 mile journey home.

Lo and behold after a half mile of driving, the bike ran perfect, the fan even kicked on at a stop light.

Is this bike possessed or what?????

I am praying I don't have to pull the carbs again, but if I do I am going to do the ear shave most likely so they will be easier to get in this time...

Oh the coolant sensor is shot, I checked it out earlier, fan is good, just wasn't get hot enough to turn on.
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post #7 of 18 (permalink) Old 08-16-2006, 10:39 PM
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The gremlins jumped off at Auto Zone, Good luck for you.

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Vroc #17649
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2001 Nomad 1500 Sold March 2012
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post #8 of 18 (permalink) Old 08-16-2006, 10:47 PM
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Where's that ride bell when you need it?

Out of VN750s...
On to bigger and better things!
1997 Black & Silver ***SOLD***
Insurance Replaced: 08/25/2008
Mileage: 10/29/08- 4644 miles


Son's **Sold: In the ARMY & married $$$**
1995 Teal Green
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post #9 of 18 (permalink) Old 08-16-2006, 11:06 PM
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If you continue to have problems, you might check for a faulty ground.

2000 A16
Drilled baffles
$65 leather saddle bags
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relocated R/R
de-badged
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post #10 of 18 (permalink) Old 08-16-2006, 11:50 PM Thread Starter
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Gremlins it must be

Gremlins it must be. I just rode a 2 mile straight away back and forth 5 times to let the sea foam work in. The bike road much better, still has a slight hicup when punching it , but nothing like earlier.

Pulled and cleaned the plugs and will run it tomorrow to see the results.
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