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    #1

    Only one horn works at a time

    Hey all,
    I'm brand new here, so it's great to be a part of this community. My first question for you all is stumping me and my dad. We have been working on my 1982 GS750E that we picked up Thursday, and have been fixing various issues with it with success. But the issue with the horn is annoying, because only one horn works at a time. I replaced both horns with new ones from an auto parts store, and updated the connectors that were on the old wires. Both sides are getting 12V, according to our volt meter, so there shouldn't be a short. When you disconnect one side, the other side works, and vice versa. So for the time being, I have only one connected and centered it on the bike. We also checked the splice, which looks good. Any suggestions? Thanks!
    Tags: None
    #2
    Maybe the new horns have a different impedance than the old? Did the stock horns have the same issue?
    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

      #3
      Have you ran a jumper from one to the other and only used one of the harness connectioins for power?? Run them in series off one set of plugs???
      MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
      1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

      NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


      I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

      Comment

        #4
        The old horns did the exact same thing, so I know the new horns aren't the problem. And how would I run a jumper between them?

        Comment

          #5
          Just run a wire from one horns 2 terminal to the other horns two terminals...then see if both work when you hit the button. Dad will know what a series is and can help you.
          MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
          1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

          NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


          I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

          Comment

            #6
            I'll definitely keep that in mind. Also, we noticed that the headlight seemed to dim a lot more when both horns were hooked up, and they made a weird clicking noise, like it was trying to sound but couldn't buzz. The weirdest thing, that's for sure. How come a series might work? I'm interested in the reasoning behind it.

            Comment

              #7
              Was thinking that if one set of wires was bad...then....but then youve added yet more details. So I am not sure a series will do squat..but you can try.
              MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
              1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

              NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


              I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

              Comment

                #8
                Well both sets of wires are showing 12V when the button is pressed, and we even checked the switch to see if something was loose or broken, but the switch is fine too.

                Comment

                  #9
                  But each horn will beep..just not when both are hooked up..Right??
                  MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                  1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                  NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                  I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                  Comment

                    #10
                    Exactly. And actually, the higher tone horn did have a tendency to not always sound, but the lower tone one is very responsive. I also tested both of the old stock horns, and neither of them would work in conjunction with the new horns.

                    Comment

                      #11
                      Look at the backs and see if theres a small phillips head with a jam nut. Loosen the jam nut and ever so slightly turn the screw. this is an adjustment for the pitch. Maybe its just not adjusted right from the factory..it happens.
                      MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                      1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                      NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                      I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                      Comment

                        #12
                        I just tried adjusting the pitch on both the new old horn, but still no luck with both. But now when both are connected, only the left one works, which is the new low tone. Does that help any?

                        Comment

                          #13
                          What is the voltage to the horns while you are pushing the button? sounds like a dirty connection somewhere and you have voltage drop when the button is pushed. My guess is it is in the button itself
                          1984 GS1100GK newest addition to the heard
                          80 GS 1000gt- most favorite ride love this bike
                          1978 GS1000E- Known as "RoadKill" , Finished :D
                          83 gs750ed- first new purchase
                          85 EX500- vintage track weapon
                          1958Ducati 98 Tourismo
                          “Remember When in doubt use full throttle, It may not improve the situation ,but it will end the suspense ,
                          If it isn't going to make it faster or safer it isn't worth doing

                          Comment

                            #14
                            The voltage was reading 12V on both sides when the button is pushed, so there is no voltage drop.

                            Comment

                              #15
                              This makes no sense if you're getting a full 12V across the horns when the button is being pressed unless the automotive horns need more like 13.6V to work properly. I just need total clarification on this... With both horns connected, and the button pressed, you measure 12V across the two horn terminals on each horn with no sound.
                              http://img633.imageshack.us/img633/811/douMvs.jpg
                              1980 GS1000GT (Daily rider with a 1983 1100G engine)
                              1998 Honda ST1100 (Daily long distance rider)
                              1982 GS850GLZ (Daily rider when the weather is crap)

                              Darn, with so many daily riders it's hard to decide which one to jump on next.;)

                              JTGS850GL aka Julius

                              GS Resource Greetings

                              Comment

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