Intriguing Problem... - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 8 (permalink) Old 02-15-2010, 01:57 PM Thread Starter
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Intriguing Problem...

So... I reinstalled my carbs over the last few days and got everything put back together... Went to start the bike and ran in to a very odd problem... The wiring for the fuel gauge began to smoke pretty bad... We disconnected the fuel gauge completely and now the bike isn't doing anything. The solenoid will click once, when you push ignition, but other than that nothing happens. This is a very annoying issue...

Any thoughts...? Ideas...? Anyone experience anything like this...? I am at a loss with this bike...

1990 VN750
Got it on 9/10/09
7683 original miles when I got it
7870 current (constantly adding more)
Mods already on bike:
Kuryakyn Iso Grips with throttle boss
Kuryakyn Iso pegs with heel rests
Windshield (not sure what brand or style, just look at my pic)
Leather Saddle bags
Leather t-bag
Mods since I got it:
Wet Battery
Many more to come...
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post #2 of 8 (permalink) Old 02-15-2010, 02:21 PM
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check the battery ground cable.

02 honda sabre 1100
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post #3 of 8 (permalink) Old 02-15-2010, 02:38 PM
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I had the exact same thing happen to mine... I had a combination of problems. First was a bad ground, second there was a short in the wiring harness under the gas tank, and lastly poor connections at the JB. after fixing all of those problems the symptom went away.
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post #4 of 8 (permalink) Old 02-15-2010, 02:48 PM
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That JB seems to be the cause of a multitude of problems. I wonder if it can be eliminated? If the wiring between the fuel gauge and where it plugs into the wiring harness overheated, that means a short circuit somewhere that is putting to much of a load on the wire. Could be the fuel gauge itself, a simple short to ground from a pinched wire, or a whole lot of other things. Time to drag out the multimeter. Jerry.

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1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
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post #5 of 8 (permalink) Old 02-15-2010, 03:55 PM Thread Starter
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Traced it and found the problem... Ground cable is broken off the post. Gotta either order a new ground wire set up or see if I can figure out a way to replace the part that mounts to the ground post. I will update when I have more info...

1990 VN750
Got it on 9/10/09
7683 original miles when I got it
7870 current (constantly adding more)
Mods already on bike:
Kuryakyn Iso Grips with throttle boss
Kuryakyn Iso pegs with heel rests
Windshield (not sure what brand or style, just look at my pic)
Leather Saddle bags
Leather t-bag
Mods since I got it:
Wet Battery
Many more to come...
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post #6 of 8 (permalink) Old 02-15-2010, 05:45 PM
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Quote:
Originally Posted by VN750Rider/Jerry View Post
That JB seems to be the cause of a multitude of problems. I wonder if it can be eliminated? If the wiring between the fuel gauge and where it plugs into the wiring harness overheated, that means a short circuit somewhere that is putting to much of a load on the wire. Could be the fuel gauge itself, a simple short to ground from a pinched wire, or a whole lot of other things. Time to drag out the multimeter. Jerry.
even though the OP said he found his problem... I have found a way to solve 90% of the JB problems. The JB is made out of a printed circuit board, 5 diodes, and three relays. Most of the failures I have seen is caused by corrosion to the circuit board, bad relays, and bad diodes... I have made modifications to my JB that removes the circuit bard, and replaces the relays with common automotive relays. For the normal DIYer, the mod is kind of difficult, but if you are good with a MM, wiring schematics, and a soldiering device, then you should have no problems... Or for those that find they are having problems with their JB and don't want to dish out $100 on a new one, and feel that a used one might leave them in the same boat, I offer a rebuild service on the JB for $60.00. The biggest advantage of using one of my JBs is that the relays can be found at any auto parts store, electrical supply store, and even at hardware stores.
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post #7 of 8 (permalink) Old 02-16-2010, 09:25 AM Thread Starter
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Just wanted to give a quick update... Replaced the part that mounts to the ground post on the frame and bike is running great. Started right up with no problems, fuel gauge is working again also. Bike is doing fantastic.

1990 VN750
Got it on 9/10/09
7683 original miles when I got it
7870 current (constantly adding more)
Mods already on bike:
Kuryakyn Iso Grips with throttle boss
Kuryakyn Iso pegs with heel rests
Windshield (not sure what brand or style, just look at my pic)
Leather Saddle bags
Leather t-bag
Mods since I got it:
Wet Battery
Many more to come...
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post #8 of 8 (permalink) Old 02-16-2010, 05:31 PM
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Great news!!! glad it was so simple
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