Wiring harness - Extra Ground?

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  • dwilson0725
    • Jan 2026

    #1

    Wiring harness - Extra Ground?

    Hey guys, I just got through routing my cleaned up wiring harness and was making sure all my wires were accounted for. I have a ground wire I'm unsure where it goes. I had it separate from the harness in a bag for frame bolts.

    Description: About a foot long, two ring ends with a bullet connection in the middle. One side appears to be OEM wire and the other appears to have a new ring terminal.

    Anybody have a clue about what this could be and where it should go? I can't think of anything that should be grounded that isn't.

    -David W.
  • posplayr
    Forum LongTimer
    GSResource Superstar
    Past Site Supporter
    • Dec 2007
    • 23673
    • Tucson Az

    #2
    sounds like the harness ground.

    Comment

    • hillsy
      Forum Sage
      • May 2008
      • 1469
      • Brisbane, Queensland, Australia

      #3
      How big are the rings? Could they go on the back of the indicator stalks as a ground?
      Current:
      Z1300A5 Locomotive (swapped my Intruder for it), GS450 Cafe Project (might never finish it....), XT500 Commuter (I know - it's a Yamaha :eek:)

      Past:
      VL1500 Intruder (swapped for Z1300), ZX9R Streetfighter (lets face it - too fast....), 1984 GSX750EF, 1984 GSX1100EF (AKA GS1150)
      And a bunch of other crap Yamahas....

      Comment

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

        #4
        Look like these ring lug ground wires?

        Comment

        • dwilson0725

          #5
          All indicator grounds are accounted for.

          Yes, very similar in size to those ring terminals, except this wire has them on both ends. I'll upload a pic later today.
          As a clue to myself, it was in a bag with various frame bolts, such as the seat plate bolts, battery box bolts, and a few other misc. grommets and screws.

          I'm probably overlooking something obvious here...

          Comment

          • Guest

            #6
            Could be ground wire from battery box to frame or motor as most battery boxes are mount
            ed in rubber

            Comment

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

              #7
              I'm with hjfisk on the location, but the part that puzzles me is ... why the bullet connector in the middle?

              .
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              hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
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              #2 son: 1980 GS1000G
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              Comment

              • dwilson0725

                #8
                That confused me as well. I was convinced it had to be from the battery terminal to a ground somewhere, but I can't see anything I'm missing in the wiring diagram. I'm still waiting on a few connectors before I can start checking for ungrounded components.

                Comment

                • hillsy
                  Forum Sage
                  • May 2008
                  • 1469
                  • Brisbane, Queensland, Australia

                  #9
                  BTW - what colour is the wire?
                  Current:
                  Z1300A5 Locomotive (swapped my Intruder for it), GS450 Cafe Project (might never finish it....), XT500 Commuter (I know - it's a Yamaha :eek:)

                  Past:
                  VL1500 Intruder (swapped for Z1300), ZX9R Streetfighter (lets face it - too fast....), 1984 GSX750EF, 1984 GSX1100EF (AKA GS1150)
                  And a bunch of other crap Yamahas....

                  Comment

                  • 850 Combat
                    Forum Guru
                    Past Site Supporter
                    • Sep 2006
                    • 6018
                    • Spokane, WA, and Hampden, ME

                    #10
                    The bikes are light on grounds, in my opinion. I like to add a ground from the ring terminal where the R/R is grounded at the starter solenoid bolt back to the battery, and then to the frame, usually at the front battery box bolt. The grounding of the battery box through the zing plated tubes in the rubber grommets goes bad with corrosion over time.
                    sigpic Too old, too many bikes, too many cars, too many things

                    Comment

                    • hillsy
                      Forum Sage
                      • May 2008
                      • 1469
                      • Brisbane, Queensland, Australia

                      #11
                      Originally posted by 850 Combat
                      The bikes are light on grounds, in my opinion. I like to add a ground from the ring terminal where the R/R is grounded at the starter solenoid bolt back to the battery, and then to the frame, usually at the front battery box bolt. The grounding of the battery box through the zing plated tubes in the rubber grommets goes bad with corrosion over time.
                      A lot of bikes are pretty flimsy when it comes to grounds - most will have the -ve from the battery to the engine and then rely on the engine mounts to complete the circuit back to the frame. On my KZ13 I ran an extra ground from the mounting point of the -ve lead at the engine back to the frame and it resolved a lot of issues.
                      Current:
                      Z1300A5 Locomotive (swapped my Intruder for it), GS450 Cafe Project (might never finish it....), XT500 Commuter (I know - it's a Yamaha :eek:)

                      Past:
                      VL1500 Intruder (swapped for Z1300), ZX9R Streetfighter (lets face it - too fast....), 1984 GSX750EF, 1984 GSX1100EF (AKA GS1150)
                      And a bunch of other crap Yamahas....

                      Comment

                      • Redman
                        Forum LongTimer
                        Past Site Supporter
                        • Mar 2004
                        • 13717
                        • Michigan, west Michigan

                        #12
                        Look see if is a ground wire (black/white) under one of the mounting bolts on the starter solenoid. THis would be the ground wire to the battery box that others have mentioned. Although that wire usally comes out of the main harness of the bike, but maybe someone made it direct to battery negitive by adding the connector and another piece of wire.


                        .
                        http://webpages.charter.net/ddvrnr/GS850_1100_Emblems.jpg
                        Had 850G for 14 years. Now have GK since 2005.
                        GK at IndyMotoGP Suzuki Display... ... GK on GSResources Page ... ... Euro Trash Ego Machine .. ..3 mo'cykls.... update 2 mocykl


                        https://imgur.com/YTMtgq4

                        Comment

                        • dwilson0725

                          #13
                          Originally posted by hillsy
                          BTW - what colour is the wire?
                          The wire is B/W.

                          Originally posted by 850 Combat
                          The bikes are light on grounds, in my opinion. I like to add a ground from the ring terminal where the R/R is grounded at the starter solenoid bolt back to the battery, and then to the frame, usually at the front battery box bolt. The grounding of the battery box through the zing plated tubes in the rubber grommets goes bad with corrosion over time.
                          I was actually considering just using it to improve the redundancy of my grounds somewhere.

                          Can anyone list where there should be frame and engine grounds? I'd like to verify that I have them all. At least according to the wiring diagrams I do....

                          Comment

                          • dwilson0725

                            #14
                            Originally posted by Redman
                            Look see if is a ground wire (black/white) under one of the mounting bolts on the starter solenoid. THis would be the ground wire to the battery box that others have mentioned. Although that wire usally comes out of the main harness of the bike, but maybe someone made it direct to battery negitive by adding the connector and another piece of wire.
                            I do have the ground for the starter solenoids, this wire isn't long enough to go from solenoids to battery.

                            I have the R/R ground, the starter relay ground, the turn signal grounds, the solenoid ground, the engine ground, and the fuse ground. Perhaps this was just an extra ground someone added... but at least half of this wire is OEM for certain.

                            Comment

                            • Redman
                              Forum LongTimer
                              Past Site Supporter
                              • Mar 2004
                              • 13717
                              • Michigan, west Michigan

                              #15
                              Well, if everything is working.... whatever that ground wire was for must have gotten replaced with some other wiring.

                              .
                              http://webpages.charter.net/ddvrnr/GS850_1100_Emblems.jpg
                              Had 850G for 14 years. Now have GK since 2005.
                              GK at IndyMotoGP Suzuki Display... ... GK on GSResources Page ... ... Euro Trash Ego Machine .. ..3 mo'cykls.... update 2 mocykl


                              https://imgur.com/YTMtgq4

                              Comment

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