Start button blowing fuse - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 18 (permalink) Old 01-20-2014, 03:09 AM Thread Starter
'03 VN750 "Rosie"
 
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Start button blowing fuse

Hey everyone. I need some help! I stopped for gas after running some errands around town and after I was done filling up I turned the key and hit the start button and nothing happened. No click, no dimming of the dash lights, no action of the starter motor. I tried turning the key on and off and even tried unsuccessfully to push start it. AFter a few minutes of this, I hit the button again and it started right up! I rode to my next stop and shut the motor off, then turned the key back on and tested it and the button was dead again, but after a few minutes it came alive again. A few hour later I went to ride it home and it started the first time.

Searching this site I found several references to cleaning the ignition switch, but it seems to be doing fine; the motor is not cutting out while riding. Today I took apart the start button, cleaned the contacts, put it back together. I tested it in my hand and the starter jumped, then put the whole thing back in the box on the handlebars and put everything back together. (FWIW I changed the headlight bulb and lubed the throttle cables as well.) But, when I turned
the key and hit the starter it did nothing again! Not only that, but I hit it a few more times then the main fuse blew. I changed the fuse and tried again and the fuse blew on the very first try. I've taken a continuity tester and determined that the start button is completing a circuit. I used a test light and tried various connections to see if they were live but when I touch it to the start button metal it not only lights up but a buzzing comes from the junction box as well. I also tried touching a screwdriver to the two posts on the starter solenoid to bypass it and power the starter; I got a great light show but no action from the starter. I checked the wiring around the steering neck and nothing looks pinched or damaged. Any suggestions would be greatly appreciated!

'03 VN750 "Rosie"
Purchased in June 15, 2010
Windshield
Lubed Splines
Lubed and Adjusted Clutch Cable, Throttle Cables.
Relocated Voltage Regulator
Brakes Bled
Luggage Rack
Lazy Rider Bag
Leather Saddle Bags
Legitimate Title!! (finally!) Aug 30, 2010
New AGM Interstate Battery Sept 15, 2012

2008 Hyosung GV250 (sold!)
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post #2 of 18 (permalink) Old 01-20-2014, 08:25 AM
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It sounds like 1 of two things, either your starter siezed up or your starter solenoid went out. Or a combination of both. what happens when you take a screwdriver and jump the two large posts on the starter solenoid?
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post #3 of 18 (permalink) Old 01-20-2014, 11:03 AM Thread Starter
'03 VN750 "Rosie"
 
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Quote:
Originally Posted by slimvulcanrider View Post
It sounds like 1 of two things, either your starter siezed up or your starter solenoid went out. Or a combination of both. what happens when you take a screwdriver and jump the two large posts on the starter solenoid?
Fireworks. As if the screwdriver were directly on the battery posts. Same result with the key either on or off.

'03 VN750 "Rosie"
Purchased in June 15, 2010
Windshield
Lubed Splines
Lubed and Adjusted Clutch Cable, Throttle Cables.
Relocated Voltage Regulator
Brakes Bled
Luggage Rack
Lazy Rider Bag
Leather Saddle Bags
Legitimate Title!! (finally!) Aug 30, 2010
New AGM Interstate Battery Sept 15, 2012

2008 Hyosung GV250 (sold!)

Last edited by bstew7890; 01-20-2014 at 11:37 AM. Reason: additional info
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post #4 of 18 (permalink) Old 01-20-2014, 11:22 AM
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A fair amount of spark would be expected, since you're activating 200-300 amps. But if you hold contact 2-3 seconds and the starter does nothing, you have problems with the starter. Make sure you aren't grounding out your jumper tool, hit the posts only.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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post #5 of 18 (permalink) Old 01-20-2014, 11:47 AM Thread Starter
'03 VN750 "Rosie"
 
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Quote:
Originally Posted by Spockster View Post
A fair amount of spark would be expected, since you're activating 200-300 amps. But if you hold contact 2-3 seconds and the starter does nothing, you have problems with the starter. Make sure you aren't grounding out your jumper tool, hit the posts only.
Even with the key off?

'03 VN750 "Rosie"
Purchased in June 15, 2010
Windshield
Lubed Splines
Lubed and Adjusted Clutch Cable, Throttle Cables.
Relocated Voltage Regulator
Brakes Bled
Luggage Rack
Lazy Rider Bag
Leather Saddle Bags
Legitimate Title!! (finally!) Aug 30, 2010
New AGM Interstate Battery Sept 15, 2012

2008 Hyosung GV250 (sold!)
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post #6 of 18 (permalink) Old 01-20-2014, 11:52 AM
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Yes. You are jumping directly from the battery to the starter. So the starter should engage if it's any good.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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post #7 of 18 (permalink) Old 01-20-2014, 01:28 PM Thread Starter
'03 VN750 "Rosie"
 
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Quote:
Originally Posted by Spockster View Post
A fair amount of spark would be expected, since you're activating 200-300 amps. But if you hold contact 2-3 seconds and the starter does nothing, you have problems with the starter. Make sure you aren't grounding out your jumper tool, hit the posts only.
OK. I jumped the posts with a screwdriver and the starter did turn over. Does that mean the solenoid is bad?

Any clue what is buzzing in or near the junction box when I touched the test light to the start button?

Thank you for the help!

'03 VN750 "Rosie"
Purchased in June 15, 2010
Windshield
Lubed Splines
Lubed and Adjusted Clutch Cable, Throttle Cables.
Relocated Voltage Regulator
Brakes Bled
Luggage Rack
Lazy Rider Bag
Leather Saddle Bags
Legitimate Title!! (finally!) Aug 30, 2010
New AGM Interstate Battery Sept 15, 2012

2008 Hyosung GV250 (sold!)
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post #8 of 18 (permalink) Old 01-20-2014, 01:39 PM
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I believe this bike has a starter relay in the jb. Real knowledge should be here soon.
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post #9 of 18 (permalink) Old 01-20-2014, 01:43 PM Thread Starter
'03 VN750 "Rosie"
 
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I believe you're right about there being a starter relay, but I'm not clear on the function of the relay vs. the solenoid.

Here's a thought! The start button worked when I was holding it in my hand after I cleaned and reassembled it. After I put it on the handlebars it started blowing the fuse. The button is in the same box as the kill switch, both of which are mounted on a metal handlebar. Could that have shorted the circuit and blown the fuse? I can't look right now as I'm not with the bike.

'03 VN750 "Rosie"
Purchased in June 15, 2010
Windshield
Lubed Splines
Lubed and Adjusted Clutch Cable, Throttle Cables.
Relocated Voltage Regulator
Brakes Bled
Luggage Rack
Lazy Rider Bag
Leather Saddle Bags
Legitimate Title!! (finally!) Aug 30, 2010
New AGM Interstate Battery Sept 15, 2012

2008 Hyosung GV250 (sold!)

Last edited by bstew7890; 01-20-2014 at 01:51 PM. Reason: more info
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post #10 of 18 (permalink) Old 01-20-2014, 01:47 PM
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It wouldn't necessarily mean the solenoid is bad. You would need to test for 12v on the smaller white (?) wire on the solenoid, when the start button is pushed, key on, trans in neutral.

Only buzzing I can think of would be the solenoid, which usually happens with a loose connection or nearly dead battery.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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