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Need a NO SPARK wiring guru... HELP

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  • Need a NO SPARK wiring guru... HELP

    So I'm building a custom bobber and made my own harness out of the stock one. I have dyna coils. Bike cranks just fine. I have OEM manual and swear im putting wires were they should be but not getting spark. All ignition system tests and checks are good. I believe that it may have somthing to do with the relay (#9 on schematic) and a ground issue, because it's just not switching to groumd to make the spark. Cant wrap my head around it. Any help would be very much appreciated.

  • #2
    Wires to/through the side stand switch need continuity for spark, also.

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    • #3
      Ya I originally wired everything without the relay. But what I've been reading is that it is needed to complete the "ground loop". So I have tried to re wire it back in. But I believe I burnt out the side stand diode because I have continuity both ways threw it. But I cannot find a replacement diode anyware. Bike is a 99' btw. So I ordered a diode from a 2001 but it is somewhat of a different diode so idk if it will work the same?

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      • #4
        And from the schematic it looks like all I need from that relay is just power into the blue/yellow and out threw sky blue?

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        • #5
          Click image for larger version

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          • #6
            I have a schematic. Thank you tho

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            • #7
              Tring to upload a picture of diodes to show the difference in them

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              • #8
                According to the "ignition system" schematic in manual it just shows that I need the blue yellow and sky blue from relay. Can anyone confirm that? I have my own starting system figured out

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                • #9
                  i have a diagram i drew up totaly elimiating the reay and all connections needed to make it work, some need earth some need 12v
                  Sometimes it takes a whole tank of gas before i can think straight

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                  • #10
                    check on my youtube channel, on the buildup of my bobber , there are episodes on the wiring youtube https://youtu.be/6hcL8H0DSW4 and part 12 i think check them out,,,i can send you a copy via email
                    Sometimes it takes a whole tank of gas before i can think straight

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                    • #11
                      Originally posted by hotrod460 View Post
                      check on my youtube channel, on the buildup of my bobber , there are episodes on the wiring youtube https://youtu.be/6hcL8H0DSW4 and part 12 i think check them out,,,i can send you a copy via email
                      I think I have seen your videos before a time.or two. But I will give it a look again. My email is [email protected] if you wouldn't mind sending a copy of eliminated diagram.

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                      • hotrod460
                        hotrod460 commented
                        Editing a comment
                        ok no probs ill send it this eve about five hours from now (uk),,,,any questions just ask , we all learn by asking

                      • hotrod460
                        hotrod460 commented
                        Editing a comment
                        just sent you my wiring diagram

                    • #12
                      I feel dumb asking but is earth ground on the frame? And 12v ground from battery?

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                      • Duke
                        Duke commented
                        Editing a comment
                        Yes, earth is ground.

                      • hotrod460
                        hotrod460 commented
                        Editing a comment
                        yes ground is earth or battery - neg and/or any wire connected to it, normaly black. 12V is battery + or live and/or any wire fed from the fuse box with 12v on it

                    • #13
                      If I remember right there are 4 wire's coming from the ignition switch. Two need to be wired for on-off function and the other two need looped together for spark. Make sense? I found this out because a buddy eliminated his key for a on-off two way switch

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                      • #14
                        Originally posted by Ftwbear View Post
                        If I remember right there are 4 wire's coming from the ignition switch. Two need to be wired for on-off function and the other two need looped together for spark. Make sense? I found this out because a buddy eliminated his key for a on-off two way switch
                        I'll look into that too, because I'm not using stock ign. Switch.

                        Comment


                        • Ftwbear
                          Ftwbear commented
                          Editing a comment
                          Yes there were 4 wire's coming from the ignition switch, two I used for power on-off. Everything would come on a would crank over. But no spark. Once I bridged/looped the other two wires together it would fire right up. I think it was the small plug that needed looped together.

                      • #15
                        Did you ever figure it out? I am running into the exact same situation but on a 2006 Roadstar 1700. Looking at your wiring diagram it almost looks identical. I also wired in my own relay to replace #9 on the diagram. Engine cranks, everything else works but no spark.

                        Also sorry to bring up a old thread!

                        Comment


                        • #16
                          Start a new thread with more detail of what you did and what your issue is and I'll bet someone will jump in and help. The original poster of this thread hasn't logged back on here since 2018 so he isn't gonna answer your question.

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                          • Cubo55
                            Cubo55 commented
                            Editing a comment
                            Copy that

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