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Thread: Ignition fuse blew

  1. #1
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    Default Ignition fuse blew

    Started bike up today, all was going well, idled good, revved nicely and would go down pretty smoothly aswell. So after checking multiple times for a hanging idle from about 3-4k I gave one good rev just to Make sure it really isnt sticking, bike went to a out 5-6k and then everything turned off, then back on, and I saw a "light" go off in the fuse box and well, the ignition fuse blew.


    What can be the causes? Dyna S is working properly, coilpack, leads, and plugs are all fine and well withing spec. I replaced connections yesterday and one wore, and I dont have that intermittent short anymore so most is solved, but that darn fuse blew.

    Coukd the R/R be to blame?
    Ian

    1982 GS650GLZ

    Want a "twin" for my bike

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    High idle not related to anything blowing a fuse.

    R/R failing and shorting to ground usally blows main fuse. And fuse will blow again as soon as replace the fuse.

    Had 850G for 14 years. Now have GK since 2005.
    GK at IndyMotoGP Suzuki Display... ... GK on GSResources Page ... ... Euro Trash Ego Machine .. ..3 mo'cykls.



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    Quote Originally Posted by Redman View Post
    High idle not related to anything blowing a fuse.

    R/R failing and shorting to ground usally blows main fuse. And fuse will blow again as soon as replace the fuse.

    Its my ignition fuse blowing not the main, any ideas?
    Ian

    1982 GS650GLZ

    Want a "twin" for my bike

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    You asked if R/R could be to blame for the IGNition fuse blowing. I will say probably not because R/R failing usally blows the main fuse.
    But if the fuse blows again, especially if it blows right away, as a test you can disconnect the r/r (bike will still run, just not charge battery) to see if fuse doesnt blow then.

    IGNition curcuit goes to the ignition coils and the ignitor. And the the kill swtich and the startere button-solenoid, but I dont suspect the starter button-solenoid since didn blow when pushing the button.


    You havent said if fuse blows again right away, or if only once in a while. You did say at mid-higr rpms it blew once, but not anything about after replacing the fuse.

    If fuse blows again every once in a while, I would suspect a frayed wire some where ground out to the frame. THe Org/Wht is the ignition circuit. Higher rpm could cause it just bye more vibration. Have heard of corrsion and or such by the kill switch. Have heard of frayed wire (org-wht) unnder tank along frame near the coils.

    Had 850G for 14 years. Now have GK since 2005.
    GK at IndyMotoGP Suzuki Display... ... GK on GSResources Page ... ... Euro Trash Ego Machine .. ..3 mo'cykls.



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    Quote Originally Posted by Redman View Post
    You asked if R/R could be to blame for the IGNition fuse blowing. I will say probably not because R/R failing usally blows the main fuse.
    But if the fuse blows again, especially if it blows right away, as a test you can disconnect the r/r (bike will still run, just not charge battery) to see if fuse doesnt blow then.

    IGNition curcuit goes to the ignition coils and the ignitor. And the the kill swtich and the startere button-solenoid, but I dont suspect the starter button-solenoid since didn blow when pushing the button.


    You havent said if fuse blows again right away, or if only once in a while. You did say at mid-higr rpms it blew once, but not anything about after replacing the fuse.

    If fuse blows again every once in a while, I would suspect a frayed wire some where ground out to the frame. THe Org/Wht is the ignition circuit. Higher rpm could cause it just bye more vibration. Have heard of corrsion and or such by the kill switch. Have heard of frayed wire (org-wht) unnder tank along frame near the coils.

    My bad, didnt read it right. This is the first time the fuse has ever blown so I'm not sure how often it would happen.

    The wires that run to the coils arent the best looking, so I will just run new wires for it and hopefully that makes the difference.

    I have cleaned the killswitch, and no it didnt happen when pressing start button lol.

    Thankyou!
    Ian

    1982 GS650GLZ

    Want a "twin" for my bike

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    Quote Originally Posted by timebombprod View Post
    .

    The wires that run to the coils arent the best looking, so I will just run new wires for it and hopefully that makes the difference.

    .
    Wires can "look bad" but as long as dont see areas where insulation is worn away, and dont see copper strands anywhere, then dont need to think could be causing a short to ground somewhere. Do Look especially close to where the wire runs next to an edge of something on the frame, could be just one little spot where insulation worn thru right there (and some vibration or bump makes it touch the metal frame).

    If fuse fuse blew only once and doesn't repeat for a while, could be be the fuse fatigued with years of service.
    Last edited by Redman; 04-08-2021 at 01:14 PM.

    Had 850G for 14 years. Now have GK since 2005.
    GK at IndyMotoGP Suzuki Display... ... GK on GSResources Page ... ... Euro Trash Ego Machine .. ..3 mo'cykls.



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    Good news, aswell as bad.

    Good news is, I got to ride and the fuse didnt blow this time! I do not have an intermittent short anymore as far as I can hear or tell, and for the most part my hanging idle has left.

    Bad news....my bike went to twin mode again during the ride, making me have to keep pressure to throttle so I dont have bike shut off, my right side turn signal went, and it's the flasher, and my bike popped profusely. Jeez louise

    The thing about it going into twin mode, o did a spark test about 10 minutes after shutting the bike off and bringing it in, and what do you know, all 4 plugs sparked.
    I did notice 2 and 3 had coilplugs noticeably hotter than 1 and 4s coil plugs.

    Heres my thought, something is making the wires get too hot, if this sounds wrong or neverhappens, let me know.
    Ian

    1982 GS650GLZ

    Want a "twin" for my bike

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    Good to hear that the IGNition fuse held. Gives some idea that not going to be a repeat problem. But maybe need more time-miles befpore fully say that.

    About your Ingition problem (which is more the subject of your other thread):
    Quote Originally Posted by timebombprod View Post
    . .
    .... my right side turn signal went, and it's the flasher, .......
    Tell us more. You mean the right side didnt flash... did it used to?
    Reason I ask is that sometimes the flashers not flashing is the first indication of low voltage, because of charging system problems, and low voltage can also effect the ignition system (especially if are also loosing a volt or two from battery to the coils). So check battery voltage at 4k rpm and check at coils too.

    Had 850G for 14 years. Now have GK since 2005.
    GK at IndyMotoGP Suzuki Display... ... GK on GSResources Page ... ... Euro Trash Ego Machine .. ..3 mo'cykls.



  9. #9
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    It happened to me years ago on my 850. The hot wire to the coils had shorted out. I ran a new one

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    Quote Originally Posted by Redman View Post
    Good to hear that the IGNition fuse held. Gives some idea that not going to be a repeat problem. But maybe need more time-miles befpore fully say that.

    About your Ingition problem (which is more the subject of your other thread):

    Tell us more. You mean the right side didnt flash... did it used to?
    Reason I ask is that sometimes the flashers not flashing is the first indication of low voltage, because of charging system problems, and low voltage can also effect the ignition system (especially if are also loosing a volt or two from battery to the coils). So check battery voltage at 4k rpm and check at coils too.
    Yes it used to, not anymore just get a buzzing. Ordered a new stator going to fix what's going on, my bike runs like crap low end but eventually picks up on higher side, also runs on twin mode when riding but sparks on all 4 every time I do a spark test. So yes I'm not getting the right amount of voltage more than likely.

    I have done a charging test and my stator is gone but I didnt realise it would affect thisnmuch.
    Ian

    1982 GS650GLZ

    Want a "twin" for my bike

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