Dead short in wiring

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  • Quick Cal
    • Jan 2026

    #1

    Dead short in wiring

    My rear shocks are shot. So the bike is bottoming up and slamming the frame when I hit a big bump. It sometimes blows the main fuse.

    I put a new fuse in and all is well until the next big bump. I know. Fix the shocks. But in the mean time I need to find the short.

    It has now shorted out and blows the new fuse as soon as I put it in. I know just start looking. But is this a common problem that you guys could maybe point me where to a usual suspect. Thanks
  • tom203
    Forum Guru
    Past Site Supporter
    • Aug 2010
    • 8925
    • Norway,Maine

    #2
    An old friend returns home - to haunt and taunt you!
    Disconnect R/R plug and put in new main fuse. Does fuse blow?
    1981 gs650L

    "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

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    • 2BRacing
      Forum Mentor
      • Jan 2009
      • 796
      • Onrus, near Hermanus, South Africa

      #3
      You've let the smoke out!
      1981 GS850G "Blue Magic" (Bike Of The Month April 2009)

      1981 GS1000G "Leo" (Bike Of The Month August 2023)

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      • Quick Cal

        #4
        Hmmm. Auto email notification isn't working. I missed the replies. Sorry.

        Tom. I haven't messed with the GS for quite awhile. It's mad at me. By R/R do you mean right rear plug on the fuse block. I'm just guessing with out looking. I'll take a look later today.

        Comment

        • Steve
          GS Whisperer
          • Jun 2005
          • 35924
          • southwest oHIo

          #5
          Originally posted by Quick Cal
          By R/R do you mean right rear plug on the fuse block.
          No, by "R/R", he means "Rectifier/Regulator", the heart of the charging system.

          Unplug the red output wire from the harness. It might be in a 4-pin connector with the three stator wires, just unplug the entire connector and see if your fuse blows.

          Can't say for sure where it is on your bike, it might be under the right side cover or over the battery.

          My son has an '82 650L, but the wiring has been botched and bodged on it so much, I can't say for certain where any of the bits and pieces used to be.

          .
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          #2 son: 1980 GS1000G
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          • Quick Cal

            #6
            Thanks Steve. I'll check it out.

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            • tom203
              Forum Guru
              Past Site Supporter
              • Aug 2010
              • 8925
              • Norway,Maine

              #7
              On my "L", that r/r plug is right above solenoid, next to 2 wire connector plug from signal generator.
              edit: should have said that is where it used to be,now long gone.
              Last edited by tom203; 08-08-2014, 10:38 AM.
              1981 gs650L

              "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

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              • Quick Cal

                #8
                I finally got to mess with this a little bit. I've been busy playing with my new Harbor Freight tire changer.

                First thing I did was look around for a shorted wire. I found nothing.

                Is the what you guys want me to unplug. See the unplugged connector. So I unplugged it, put a fuse in and it didn't blow. I then plugged the connector back in and the fuse still did not blow, and everything powered up. I wiggled a lot of wire's and nothing happened.

                So what does all this mean,,,,lol.

                Last edited by Guest; 08-10-2014, 08:46 PM.

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                • posplayr
                  Forum LongTimer
                  GSResource Superstar
                  Past Site Supporter
                  • Dec 2007
                  • 23673
                  • Tucson Az

                  #9
                  One thing; iave you cleaned out that fuse box? That can and often does lead to shorts. On this case clean mans pull the back off chemically clean and flow solde into the internal crimps.

                  you should have some contact cleaner like Deoxit or a highly recommended radioshack brand to spray all connectors as you pull them apart.

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                  • tom203
                    Forum Guru
                    Past Site Supporter
                    • Aug 2010
                    • 8925
                    • Norway,Maine

                    #10
                    In your pic, the R/R plug is just to left of plug you disconnected- it's under the frame rail with 4 wires. Maybe a wire is touching frame or maybe your problem happens when R/R has been hot for a while.
                    1981 gs650L

                    "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

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