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  • no power

    I was riding my 81 midnight has been running great. Turned it off when I turned back on started fine died and has no power at all. Am I right power goes from switch to headlight then to rest of system?
    Joe Bjordahl
    “speed don't kill it’s the sudden stops”
    Yamaha xs1100 are addictive
    1979 XS1100S
    1981 XS1100 MIDNIGHT
    1982 XS1100S DONER BIKE

  • #2
    Re: no power

    Nope. The headlight is on its own circuit. Pull the headlight fuse and start the bike if it will just to see. This is the time of year when batteries can be suspect. They may look OK by putting a multimeter across them after a charge, but quickly drain-off that skin charge. Remember too that idling will not provide net positive charging. Batteries have been known to short-out. The brain box needs like 10.3 volts to provide spark.

    Originally posted by floridajoe
    I was riding my 81 midnight has been running great. Turned it off when I turned back on started fine died and has no power at all. Am I right power goes from switch to headlight then to rest of system?
    Skids (Sid Hansen)

    Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.

    Comment


    • #3
      PS, if you have NO power, it is likely the main fuse or its connections.
      Skids (Sid Hansen)

      Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.

      Comment


      • #4
        battery is good. i have no power at the fuse box tested all wires. no power in wires in head light. only wire that have power from battery to switch and the red wire that connects to + battery cable. i am lost thanks for any help
        Joe Bjordahl
        “speed don't kill it’s the sudden stops”
        Yamaha xs1100 are addictive
        1979 XS1100S
        1981 XS1100 MIDNIGHT
        1982 XS1100S DONER BIKE

        Comment


        • #5
          Your main fuse for the models you are listing below your name will have a main fuse separate from the fuse box. It will be under your seat near the left side cover. 30 amp.

          Originally posted by floridajoe
          battery is good. i have no power at the fuse box tested all wires. no power in wires in head light. only wire that have power from battery to switch and the red wire that connects to + battery cable. i am lost thanks for any help
          Skids (Sid Hansen)

          Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.

          Comment


          • #6
            found main have power there trying to track back to were i lose it
            Joe Bjordahl
            “speed don't kill it’s the sudden stops”
            Yamaha xs1100 are addictive
            1979 XS1100S
            1981 XS1100 MIDNIGHT
            1982 XS1100S DONER BIKE

            Comment


            • #7
              can i bypass ign switch. i unplug pigtail in head light i then have power pug back in lose it. could that be a bad switch or line over heating. the main fuse wire does get warm but dont think hot
              Joe Bjordahl
              “speed don't kill it’s the sudden stops”
              Yamaha xs1100 are addictive
              1979 XS1100S
              1981 XS1100 MIDNIGHT
              1982 XS1100S DONER BIKE

              Comment


              • #8
                I think it might be time to clean all of the ground connections, but it is difficult for me to give advice on electrical while on line. It is something that I am only halfast good at if I am in person. Someone else chime-in here?

                Originally posted by floridajoe
                can i bypass ign switch. i unplug pigtail in head light i then have power pug back in lose it. could that be a bad switch or line over heating. the main fuse wire does get warm but dont think hot
                Skids (Sid Hansen)

                Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.

                Comment


                • #9
                  i will start to clean all connections see what happens from there
                  Joe Bjordahl
                  “speed don't kill it’s the sudden stops”
                  Yamaha xs1100 are addictive
                  1979 XS1100S
                  1981 XS1100 MIDNIGHT
                  1982 XS1100S DONER BIKE

                  Comment


                  • #10
                    it is alive....... skids thanks for all the help it was 2 things first conn very dirty broke wire that was grounding in the headlight bucket. i have said before this is the best web site with a lot of great people thanks again
                    Joe Bjordahl
                    “speed don't kill it’s the sudden stops”
                    Yamaha xs1100 are addictive
                    1979 XS1100S
                    1981 XS1100 MIDNIGHT
                    1982 XS1100S DONER BIKE

                    Comment

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