Blowing fuses - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 10 (permalink) Old 09-07-2010, 10:05 AM Thread Starter
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Blowing fuses

Think I'd rather have teeth pulled without novocain than have to work on electrical issues! But electrical problems seem to be the only ones I get.

The problem is the main fuse will blow periodically. Happens most often when it's running and I'm backing it out of the carport (so now I turn it off when going backwards ) But yesterday it happened when I stopped at an intersection. I'm guessing the seat is pressing against the wiring harness and there is a short somewhere. Any suggestions on where to look first? I really don't want to unwrap that conglomeration of wires if I can avoid it!

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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post #2 of 10 (permalink) Old 09-07-2010, 01:36 PM
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Totally happened to me. Found it my accident. There was a chaved wire in the harness running past the neck.

1990 Vulcan
------------------------------
Saturn Plum/55 Tbird red.
Accel Coils.Mangacore wires.Corbin Seat.
Cobra exhaust.Jetted to 1.1 lamda.
Wide levers,cushy grips, All steel lines....
Actually, I've changed more stuff then I can remember.
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post #3 of 10 (permalink) Old 09-07-2010, 02:42 PM Thread Starter
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Do you remember what color it was?

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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post #4 of 10 (permalink) Old 09-07-2010, 03:43 PM
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Shoot no. I remember looking down once at night and seeing a little spark when I turned. Once I looked at the harness in that area, it was PAINFULLY clear what was going on.

1990 Vulcan
------------------------------
Saturn Plum/55 Tbird red.
Accel Coils.Mangacore wires.Corbin Seat.
Cobra exhaust.Jetted to 1.1 lamda.
Wide levers,cushy grips, All steel lines....
Actually, I've changed more stuff then I can remember.
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post #5 of 10 (permalink) Old 09-07-2010, 05:02 PM
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I had a short in the white wire from the JB to the ignition.......... blew the main
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post #6 of 10 (permalink) Old 09-07-2010, 09:14 PM Thread Starter
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Thanks guys. Guess I'll start looking the next rainy day. Need to buy another box of fuses to last me till then.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
flitecontrol is offline  
post #7 of 10 (permalink) Old 09-07-2010, 11:05 PM
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The wiring harness runs from one side of the bike to the other, under the seat, behind the battery box. Mine was wired in so tight it was rubbing on a screw head. The screw eventually wore through the tape and blew the main fuse. I just loosened it up and hasn't blown since. I didn't pull the whole thing apart to find the one wire that shorted out. I just figured once the screw head wasn't rubbing on it, it would be ok. Six years now, and everything is a-ok. Worth a look see.

'04 750A- and loving it!
VROC 13864
Using a Purlator One PL14610
"Sixth gear? I don't need no stinkin sixth gear!"
If someone throws you under the bus-remember to tuck and roll
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post #8 of 10 (permalink) Old 09-07-2010, 11:13 PM
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There is some lovely thick rubber tape available at any electrical store that will cushion, insulate and prevent this stuff from happening from chafing issues. Great stuff to wrap around places where the wires go over stuff, around corners, are subject to pinching maybe, etc. It stretches thin to give many wraps, and you can keep it thick for cushioning. Then wrap it with regular electrical tape, or, if working with two separate ends at first, slip on some rather large shrink wrap before you solder and start wrapping.
If you have trouble after that with wearing through, I have no answers.
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post #9 of 10 (permalink) Old 09-08-2010, 09:45 AM Thread Starter
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Bat, I discovered that tape several months ago and plan to use it when the pesky short is found.

Ironman, I've noticed the same thing with mine. Hopefully, that is all that's wrong!

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
flitecontrol is offline  
post #10 of 10 (permalink) Old 09-16-2010, 10:19 PM Thread Starter
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Found it! Went out while it was dark, turned the key on and took it off the centerstand. Turned the bars hard right and it blew the fuse. Replaced fuse and turned bars again. This time it just sparked and I got a good look at where it was. Turned on the light and see a spot on the neck where a wire has rubbed the paint off. Lift the wire and the insulation has worn through in one spot. Problem solved! Thanks again for the help.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
flitecontrol is offline  
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