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Fuse or Relay?

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ice_station_zebra
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Fuse or Relay?

Post by ice_station_zebra » Sun Apr 12, 2020 2:21 pm

Or something else? I was changing out the battery and saw this?

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raYzerman
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Re: Fuse or Relay?

Post by raYzerman » Sun Apr 12, 2020 2:37 pm

Main Fuse, 60 amp. Blow that and bikey no go. Feeds all the 'lectrics.
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Hack
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Re: Fuse or Relay?

Post by Hack » Sun Apr 12, 2020 4:05 pm

raYzerman wrote:
Sun Apr 12, 2020 2:37 pm
Main Fuse, 60 amp. Blow that and bikey no go. Feeds all the 'lectrics.
What would it take... what would have to happen for that main fuse to blow...?
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ionbeam
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Re: Fuse or Relay?

Post by ionbeam » Sun Apr 12, 2020 4:19 pm

Hack wrote:
Sun Apr 12, 2020 4:05 pm
raYzerman wrote:
Sun Apr 12, 2020 2:37 pm
Main Fuse, 60 amp. Blow that and bikey no go. Feeds all the 'lectrics.
What would it take... what would have to happen for that main fuse to blow...?
Putting a longer than necessary screw through the faring to mount a farkle and putting the screw through the insulation of the + battery lead or the feed wire to the fuse box. Gixxerjasen hooking up an aux fuse block. Doing work around the battery area and pinching your SAE connector wire between two pieces of metal. Moving wires around and then not securing them resulting in insulation chaffing. Working around the ignition switch and harness, the power connector slips from your fingers and in a one in a million chance the female + pin in connector hits a metal bit just right/just wrong. This is one of Murphy's signature specialties, you couldn't do that on purpose if you spent a week trying. :mrgreen:

Something would have to go seriously wrong to blow the main fuse because there are smaller fuses between the electrical components the main fuse protecting the main fuse. If your main fuse blew and you wrote about it here in the Forum the words stupid or careless would likely be prominent.
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raYzerman
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Re: Fuse or Relay?

Post by raYzerman » Sun Apr 12, 2020 5:25 pm

True story, this actually happened... don't know which FJR forum but someone put their battery in backwards or something and installed battery cables (totally wrong polarity!!), and it blew the main 60 amp fuse. Bike was OK, ECU kept all its smoke contained inside it, no other damage. New safety feature discovered that's not in the manual. But, I do have a story to tell of my own.... later.
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FJRoss
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Re: Fuse or Relay?

Post by FJRoss » Sun Apr 12, 2020 7:49 pm

ionbeam wrote:
Sun Apr 12, 2020 4:19 pm
Doing work around the battery area and pinching your SAE connector wire between two pieces of metal.
Hopefully, you short something out after the fuse, not between the battery and the main fuse. Most people wire the SAE connector directly to the battery so if it gets shorted, it just blows the fuse you put in the SAE connector. What? No fuse in the SAE lead? - then the SAE lead becomes the fuse. IF the wire is REALLY robust, the battery terminals become the fuse. Main fuse is safe!

Most of my bone-headed electrical moments involve circuits fused at less than 10 amps or so. To that end, I bought a blade fuse kit from Amazon with 120 or so fuses from 2 amp to 35 amps. With the above comments as a reminder, I probably should get a spare main fuse, just in case. I plan on doing some major farkle rewiring this spring - running high-power auxiliary lights and the feed to my Fuzeblock from a barrier strip. Might route headlights and some other stuff off the main ignition switch while I am at it - no problems but I want to keep it that way. Barrier strips (switched and unswitched), extra relays, high current circuits... What could possibly go wrong?

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