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    #1

    What happened here?

    So, I ride my 78 to Cars N Coffee Sat AM, then planning a 200 mile ride for the day

    I gear up to leave C n C, no power. Attempt bump start, nothing. No dash or headlights or anything else

    I get home and check the fuses, everything is intact there and fuses are good. Go to remove known problematic fuse panel and check the connections on the back and found this: (see photo)

    Male part of the connector goes to the fuse panel.IMG_20180721_174802807.jpgIMG_20180721_174802807.jpg
    1978 GS 1000 (since new)
    1979 GS 1000 (The Fridge, superbike replica project)
    1978 GS 1000 (parts)
    1981 GS 850 (anyone want a project?)
    1981 GPZ 550 (backroad screamer)
    1970 450 Mk IIID (THUMP!)
    2007 DRz 400S
    1999 ATK 490ES
    1994 DR 350SES
    Tags: None
    #2
    The fuse panel is fine and all of the fuses are intact

    IMG_20180724_145839892.jpg

    Just that one connection caused this?
    1978 GS 1000 (since new)
    1979 GS 1000 (The Fridge, superbike replica project)
    1978 GS 1000 (parts)
    1981 GS 850 (anyone want a project?)
    1981 GPZ 550 (backroad screamer)
    1970 450 Mk IIID (THUMP!)
    2007 DRz 400S
    1999 ATK 490ES
    1994 DR 350SES

    Comment

      #3
      Orange = power

      Short?
      Ed

      To measure is to know.

      Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

      Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

      Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

      KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

      Comment

        #4
        Day-um...

        hard to believe a fuse didn't blow when that much heat was generated.

        A short in the connector itself? The burn pattern looks suspiciously like it is tracking through just one connection where the orange (?) wire runs through.

        That main lead wire in the second photo looks a little crispy, though it might just be dirt.
        '83 GS650G
        '83 GS550es (didn't like the colours in the 80's, but they've grown on me)

        Comment

          #5
          Ed,

          It's been 1,000 degrees in the garage, and I need to strip the tank (which I just filled up) and fairing to check the ends of that circuit.

          That said, that burned connector fits in the rubber pouch behind the battery, and nothing else there is melted, so I'm thinking - shorted elsewhere, this was the weak/corroded link in the circuit?
          1978 GS 1000 (since new)
          1979 GS 1000 (The Fridge, superbike replica project)
          1978 GS 1000 (parts)
          1981 GS 850 (anyone want a project?)
          1981 GPZ 550 (backroad screamer)
          1970 450 Mk IIID (THUMP!)
          2007 DRz 400S
          1999 ATK 490ES
          1994 DR 350SES

          Comment

            #6
            D - that big red wire is the main power feed from the battery to the fuse box. It's got a woven cover on it that is dirty after 40 years of use.

            Yeah, it's the orange/green wire on the Signal circuit.
            1978 GS 1000 (since new)
            1979 GS 1000 (The Fridge, superbike replica project)
            1978 GS 1000 (parts)
            1981 GS 850 (anyone want a project?)
            1981 GPZ 550 (backroad screamer)
            1970 450 Mk IIID (THUMP!)
            2007 DRz 400S
            1999 ATK 490ES
            1994 DR 350SES

            Comment

              #7
              it may not be a short, it could be a bad connection that builds up heat over time due to the increasing resistance. I have had stranded wire that corroded to the point where only 1/2 of the strands were carrying the current and yes, they got hot.
              -Mark
              Boston, MA
              Suck Squeeze Bang Blow..
              sigpic
              1980 GS850G with 79 carbs.....

              Comment

                #8
                looks like the smoke got let out....
                1983 GS 1100 ESD :D

                Comment

                  #9
                  Angry Pixies....
                  -Mark
                  Boston, MA
                  Suck Squeeze Bang Blow..
                  sigpic
                  1980 GS850G with 79 carbs.....

                  Comment

                    #10
                    Originally posted by Nessism View Post
                    Orange = power

                    Short?

                    Dirty contacts that overheat. You need current (but notnecessarilyy a short). Clearly, those contacts were getting hot ,everywhere something was crimped).


                    Get some DeoXit

                    Comment

                      #11
                      Originally posted by mvalenti View Post
                      it may not be a short, it could be a bad connection that builds up heat over time due to the increasing resistance. I have had stranded wire that corroded to the point where only 1/2 of the strands were carrying the current and yes, they got hot.
                      +1 Bingo .........

                      Comment

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