Author Topic: 2011 G5 main fuse  (Read 6753 times)

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barenekd

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Reply #15 on: June 04, 2012, 06:11:41 pm
If you're going for a 75 amp fuse, you might as well just stick the two ends of the wire together. You will fry the wires a long time before it well pull 75 amps!
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Ducati Scotty

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Reply #16 on: June 04, 2012, 06:31:50 pm
Or a fusible link, a piece of wire designed to fry at high amperages and save the rest of the harness.

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Arizoni

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Reply #17 on: June 04, 2012, 11:10:46 pm
From the looks of the replaced C5 wiring harness my Scottsdale dealer gave me as he was closing his shop, the "fusible link" seems to run from one end of it to the other!  ;D
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Ducati Scotty

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Reply #18 on: June 04, 2012, 11:23:02 pm
That's exactly what you want!  When it gets hot enough to burn it will burn all the other wires with it, protecting ALL of your components. ;)

Scott


GlennF

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Reply #19 on: June 05, 2012, 02:37:58 am
75 amp is rather excessive for a 12 volt system, especially on a motorcycle.

That is more like the sort of main fuse you would see on a 6 volt system in an old aircraft or truck.

The best compromise between safety and convenience is usually a lower amperage "slow blow" fuse.


EDIT: 

oh, and btw, standard blade fuses are only available up to 40 amps maximum.  The big ratings only available in over-sized "maxi" blade fuses.

Without actually looking up the diagram, my theory is its meant to be a 20 amp main fuse and it handles all the current for all the electrics EXCEPT the starter motor which is fed separately via a relay. Maybe someone put a 7.5 amp in by mistake. That would certianly explain why the original blew :D
« Last Edit: June 05, 2012, 03:10:08 am by GlennF »


gremlin

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Reply #20 on: June 05, 2012, 02:03:49 pm

Without actually looking up the diagram, my theory is its meant to be a 20 amp main fuse and it handles all the current for all the electrics EXCEPT the starter motor which is fed separately via a relay. Maybe someone put a 7.5 amp in by mistake. That would certianly explain why the original blew :D

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trimleyman

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Reply #21 on: June 09, 2012, 03:37:24 am
the "75 amp" amp fuse has not blown and carries ALL the load from the battery , there is not another line for the starter connecting to the battery terminal . Everything else is after this fuse. I am suspecting it is a fuse available in the Indian market but not here.
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Arizoni

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Reply #22 on: June 09, 2012, 04:36:43 am
Unless someone has been frinkling with your wiring there is no fuse between the battery and the starter motor.
Just a heavy insulated cable that goes directly from the battery to the starter solenoid and another heavy insulated cable that goes from the starter solenoid to the starter motor.

All of the battery power to all of the other electrical circuits goes thru the 20 amp fuse I already mentioned and on my G5 this is a smaller wire connected to the + terminal on the battery.

If your bike was an older Iron Barrel or even a AVL I would say that someone might have rewired it but I find it difficult to imagine anyone messing with the wiring on what is basically a new motorcycle.
« Last Edit: June 09, 2012, 04:46:11 am by Arizoni »
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GlennF

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Reply #23 on: June 09, 2012, 04:53:34 am
the "75 amp" amp fuse has not blown and carries ALL the load from the battery , there is not another line for the starter connecting to the battery terminal . Everything else is after this fuse. I am suspecting it is a fuse available in the Indian market but not here.

Well a motorcycle starter motor will draw something like 40-50 amps ( car starters pull more like 150 amps) so if your full starter current goes through this fuse it would need to be 75 amp.  The real question though is  why would anyone put a fuse on the starter circuit ?