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Where's My Ignition Fuse?

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  • Where's My Ignition Fuse?

    Ok. So I'm changing my old fuse box to a modern spade style box. I'm tired of the old glass tubes but mainly the tiny fragile brass clips that seem to brake avery time I pull a fuse.
    Looking at the wireing diagram and other box's posted in forums here there are four fuses in the the box, Main, Head Light, Signals + Ignition. My box only has three, Main, Head + signals. The ignition is missing. Obvisously theres an Ingnition fuse hidden in the system somewhere but I can't seem to find it. Has anyone else come across this? Do you know where I might find this fuse?

    I've attached a photo of my current fuse box below.
    Learning as I go.
    ( I may have some dumb questions, so bare with me )

    Current Bike:
    '79 XS1100 Standard

  • #2
    Looks like there is a brown and a red/wht wire coming out of the harness and heading toward the rear of the bike somewhere. It should be those 2 wires for the ignition fuse.
    2H7 (79) owned since '89
    3H3 owned since '06

    "If it ain't broke, modify it"

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    • #3
      Originally posted by bikerphil View Post
      Looks like there is a brown and a red/wht wire coming out of the harness and heading toward the rear of the bike somewhere. It should be those 2 wires for the ignition fuse.
      Ok, I did notice those wires and tried to find them in the back of the bike. I have another photo showing those wires connected to a solid red wire. I'll have to check the bike again but now looking at this photo I'm thinking that the fuse in a small black housing hiding in the top right on the image. Must have missed that some how.
      Last edited by CMPNW; 07-12-2022, 04:01 PM.
      Learning as I go.
      ( I may have some dumb questions, so bare with me )

      Current Bike:
      '79 XS1100 Standard

      Comment


      • #4
        Looks like someone hot wired the ignition fuse, that brown wire that is connected to that big red wire going to the top post of the solenoid is one half of it, there should be a red/wht wire which would be the other half.

        Those 2 wires should be disconnected from where they run now and go to the new fuse block
        Last edited by bikerphil; 07-13-2022, 08:51 PM.
        2H7 (79) owned since '89
        3H3 owned since '06

        "If it ain't broke, modify it"

        Comment


        • #5
          I'm resurrecting this thread because I also have a fuse box question. As seen in the photo above there is a glass fuse in the bottom left of the triangle, along with two silver circles, one being positive and one negative. I thought that was just like a spare fuse holder but when I took the fuse panel bracket out there are two wire that go to it. Does anyone know what that fuse is and those little terminals?

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          • #6
            That's an accessory fuse that you can use to add a circuit for whatever reason you need, it has nothing to do with the operation of the bike itself.
            1980 XS1100G

            I identify as a man but according to the label on a package of Stauffers Baked Lasagne I'm actually a family of four!

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            • #7
              Oh interesting, it looks like mine is hooked up to something, I have a 1980 xs11 special and I was under the impression the bike was completely stock and I have no idea what that is hooked up to. I also have 4 fuses and a main fuse, I thought there was only 3 plus the main fuse on these bikes. Theres two in the original location and it looks like the other 2 are inline fuses then the main fuse.

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              • #8
                The connection to it supplies power, it's switched meaning it only comes on when you have the key in the "on" position. My bike has a fairing on it and I added a lighter type socket to charge my phone, compressor, air pump for my mattress and run a small inverter. The fairing wiring has the opposite side of that wire running through the harness to run an accessory such as a radio.

                When I upgraded my fuse box I ran a wire from the battery side of the starter solenoid to the fuse box so I can run it with the key in the off position, a separate positive wire was run to the outlet, this was before I discovered those wires you're holding (oops) An outlet ia handy thing to have and they make them so you can mount them on your handlebars too.
                Last edited by LAB3; 04-14-2023, 10:12 PM.
                1980 XS1100G

                I identify as a man but according to the label on a package of Stauffers Baked Lasagne I'm actually a family of four!

                Comment


                • #9
                  Patrick, maybe this picture of an 80 special (3J6) fusebox will help?

                  Click image for larger version

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                  Click image for larger version

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                  Bob's Bikes:
                  79SF, Military theme bike

                  Bob's websites:
                  https://projectxs11.wordpress.com
                  https://rucksackgrunt.com

                  Bob's Books:
                  "
                  Project XS11"
                  "Rucksack Grunt"
                  "Jean's Heroic Journey"


                  Bob's Parts:
                  For Sale Here.

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                  • #10
                    Yes it does thank you I was curious what amp ratings I needed for each fuse. I’m switching to blade fuses and adding the main fuse to the main fuse block. I’ll send a photo when I’m done.

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