blowing fuses

[Jeffhorn]

The misceant involved is a 1997 F650 "Funduro". The 15 amp fuse has began blowing regularly again. It was doing the same last summer but retightening the battery cables fixed the problem. Now that spring is here it's doing the same thing all over again. I have cleaned and tightened the battery terminals but fuses still blow. Any ideas out there?

[stkmkt1]

My 1977 Honda CB750A has blown its main fuse ever since it was new. Honda came out with a recall in the late 70's to replace the fuse block. Still never helped. To this day, it still blows the fuse. No real reason that I have ever been ever to figure out. I even got rid of the fuse block all together, replaced it with three inline fuses. It still blows a fuse about once a season. It typically happens when your on an exit ramp coming of the interstate. But it has been known to blow a fuse while sitting at a stop light.

I just carry a box of fuses with me and pop new one in when it happens. This doesn't help solve your problem, but maybe it will give you an idea or to where else to look - like the fuse block.

[klwbmw]

Look here for some help from the Chain Gang, http://faq.f650.com/FAQs/ElectricalMiscFAQs.htm#Tracing%20Problems%20Where% 20the%20Fuse%20Blows%20all%20the%20Time

You may want to verify the reason for the fuses blowing before changing the box.

If you think you want to add a switched fuse box,
http://i143.photobucket.com/albums/r130/kenwilcox57/BMW/DSC03541.jpg

You'll need to move your voltage rectifier to here,
http://i143.photobucket.com/albums/r130/kenwilcox57/BMW/DSC01994.jpg

If you are interested I can tell where to find the hardware.

Ken

[MotorradMike]

If you have a fuse that blows for no apparent reason, you really have to find out why. It's not safe to have things fail randomly on a motorcycle.

A 15A fuse will not carry 15A indefinitely. 80% of the rating is the continuous maximum current as a rule of thumb. I would suggest that you measure the current in the questionable circuit to verify it's always less than 12A.

If it turns out to be more, then you know why the fuse is blowing and you can decide what to do to fix it.