gingerprince
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| posted on 8/10/08 at 12:34 PM |
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Fireblade main fuse etc?
Having recently replaced my starter relay/main fuse unit on my 'blade engined car I got to pondering the wiring. As per the OEM wiring it's
like this: -
 
Starter Wiring
Starter bit is obvious enough.
The red wire is feed to ignition to power everything else and is protected from the battery by the 30A fuse.
The red/yellow wire is the charge feed from the rectifier and charges the battery via the 30A fuse.
Am I correct in thinking that when the engine is running, the rectifier is essentially going to directly feed the ignition, so if there's a short
circuit the main 30A fuse won't blow and things will go melty melty? Wouldn't it be better to have an additional 30A fuse on the red wire?
Or is there some law of physics that means this is not the case?
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Mark G
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| posted on 8/10/08 at 12:48 PM |
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it would seem you're right, I've wired mine in so its fused before the fuse box.
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Richard Quinn
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| posted on 8/10/08 at 03:22 PM |
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Not familar with the 'blade wiring (and never seen more of the wiring diagram) but (unless I am completely missing something which is always
possible!) how does the power from the charging circuit (red/yellow) get back to the battery +ve via the main fuse?
[Edited on 8/10/08 by Richard Quinn]
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gingerprince
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| posted on 8/10/08 at 04:13 PM |
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quote:
Originally posted by Richard Quinn
how does the power from the charging circuit (red/yellow) get back to the battery +ve via the main fuse?
It's the wire that's mainly red with little yellow (could be off-white actually!) bits, not the other one which is yellow with red bits -
that one is part of the low current circuit to power the starter relay.
[Edited on 8/10/08 by gingerprince]
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Paul TigerB6
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| posted on 8/10/08 at 04:15 PM |
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Got to agree with Richard having recently done an R1 loom. That yellow / red wire looks more like it should go to the Starting Circuit Cutoff Relay
that prevents the engine being started unless its in neutral and the clutch is in etc.
Do you have a copy of the full loom diagram at all we can look at??
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Richard Quinn
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| posted on 8/10/08 at 05:09 PM |
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quote:
Originally posted by gingerprince
quote:
Originally posted by Richard Quinn
how does the power from the charging circuit (red/yellow) get back to the battery +ve via the main fuse?
It's the wire that's mainly red with little yellow (could be off-white actually!) bits, not the other one which is yellow with red bits -
that one is part of the low current circuit to power the starter relay.
[Edited on 8/10/08 by gingerprince]
So, the red and "white" at the bottom of the picture is the rec charge feed? If so, I think
you are correct. Just include an inline fuse holder with a 30A fuse in the perm live red wire to protect everything downstream of the main fuse.
[Edited on 8/10/08 by Richard Quinn]
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gingerprince
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| posted on 8/10/08 at 06:26 PM |
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quote:
Originally posted by Richard QuinnSo, the red and "white" at the bottom of the picture is the rec charge feed? If so, I
think you are correct. Just include an inline fuse holder with a 30A fuse in the perm live red wire to protect everything downstream of the main
fuse.
Yep that's the wire. Seems odd that Honda made it like that, unless the red wire run to ignition (and the runs from there to the fusebox) are
very short runs?
I'll be off to buy an inline fuse holder then 
Cheers, Sy
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Richard Quinn
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| posted on 8/10/08 at 08:05 PM |
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Can never have too many fuses!
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