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    #1

    Tscu bypass

    I searched and found a thread from at least 10 years ago about using the 4 pin connector and two relays to bypass the ESCU and restore manual opraton only. Trouble is the attached pics in post 21 here are no longer available. So my question is has anyone saved that info. Or can someone tell me what two wires go to the left signal and obviously the other two will operate the right signal


    Tscu rebuilding - The GSResources Forums
    https://www.thegsresources.com/_forum/forum/technical-forums/electrical-ignition/50885-tscu-rebuilding?t=180162
    Place your GS electrical or ignition related questions in this forum.
    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.
    Tags: None
    #2
    What im looking for is the wiring information about using the 4 pin connector and just adding two 2 pin flasher relays to make signals work. What i need to know is what color wires go the left side and what colors go to the right. Someone posted that fix way back when there was all this optomistic chatter about producing a reliable unit.
    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

      #3
      I remember the thread but didn't save the info... sorry.
      1980 GS1000G - Sold
      1978 GS1000E - Finished!
      1980 GS550E - Fixed & given to a friend
      1983 GS750ES Special - Sold
      2009 KLR 650 - Sold - gone to TX!
      1982 GS1100G - Rebuilt and finished. - Sold
      2009 TE610 - Dual Sporting around dreaming of Dakar..... - FOR SALE!

      www.parasiticsanalytics.com

      TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/

      Comment

        #4
        YUP... I was looking to just wire up two 2 pin relays and call it good
        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

          #5
          I guess you could probably trace it with a meter by measuring what pins are getting power when you press the switch... as the lamps themselves are grounded elsewhere I think that's all you need isn't it? Power for each side from the switch to go to the relay.

          Damn you photobucket...
          1980 GS1000G - Sold
          1978 GS1000E - Finished!
          1980 GS550E - Fixed & given to a friend
          1983 GS750ES Special - Sold
          2009 KLR 650 - Sold - gone to TX!
          1982 GS1100G - Rebuilt and finished. - Sold
          2009 TE610 - Dual Sporting around dreaming of Dakar..... - FOR SALE!

          www.parasiticsanalytics.com

          TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/

          Comment

            #6
            Well... I guess that would identify the two hot leads going into the flasher. Then its a matter of which wire feeds voltage to which side correct??
            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

              #7
              So yesterday i got all 4 turn signals working. Shut it sown because t was 93 degrees and headed home. Went today to resume things and only the left will flash. Cleaned and lubed the switch..no change. Unplugged both terminals from the TSCU to scrub the pins a bit...no change. So JUST SETTING overnight this pile of suzuki excriment has failed. Even tapped on it with a wrench and notta damned thing.
              For the love of god someone develope a unit that will last 25 years!!!!!!!
              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
                Have you seen this thread :

                SOLVED Turn Signal Control Unit TSCU 1978 GS1000E 1979 GS850G ALL 1979 GS1000 Models - The GSResources Forums
                https://www.thegsresources.com/_forum/forum/technical-forums/electrical-ignition/1727413-solved-turn-signal-control-unit-tscu-1978-gs1000e-1979-gs850g-all-1979-gs1000-models
                For less than $100.00 you can replace the original TSCU, turn signal control unit with a modern self canceling turn signal control unit made by SDC, Signal Dynamics part # 01501. I've seen others in this forum, over the years, attempt to do so, that's if you have a degree in electronics engineering. This will ONLY work with the


                I looked for that and found this :

                Turn Signal Module
                https://www.signaldynamics.com/01501/
                Manufacturing Motorcycle Safety products in the USA for nearly 25 years!


                Maybe worth looking into.
                Rollingthunder is still active here.


                1501_-_Self_Cancelling_Turn_Signal_Module__55867.1590347086.600.600.jpg?c=2.jpg
                Rijk

                Top 10 Newbie Mistakes thread
                CV Carb rebuild tutorial
                VM Carb rebuild tutorial
                Bikecliff's website
                The Stator Papers

                "The thing about freedom - it's never free"

                Comment

                  #9
                  If you know some basic electrical... the control unit is replaced with two latching relays and two diodes. You lose the timer, but the cancel works. I probably have a wiring diagram for it if you want, total cost about $7

                  Comment

                    #10
                    BITZZ...
                    I sent you a PM with my email address where a diagram can be sent. Self cancelling is not an issue or necessary , Just need trouble free working signals.
                    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

                      #11
                      Originally posted by bitzz View Post
                      If you know some basic electrical... the control unit is replaced with two latching relays and two diodes. You lose the timer, but the cancel works. I probably have a wiring diagram for it if you want, total cost about $7
                      Bitzz,

                      Do you still have that wiring diagram and a list of the parts needed to do this replacement?
                      Ron
                      When I die, just cremate me and put me in my GS tank. That way I can go through these carbs, one more time!https://www.thegsresources.com/_forum/core/images/smilies/cool.png
                      1978 GS750E - November 2017 BOTM
                      1978 GS1000C - May 2021 BOTM
                      1982 GS1100E - April 2024 BOTM
                      1999 Honda GL1500SE

                      Comment

                        #12
                        I looked for a diagram... can't find it.. yet.
                        Doing some wiring on that bike soon, I'll see if I can wipe something up.
                        • Likes 1

                        Comment

                          #13
                          If memory ( and a quick look at the 850 diagram) serves..
                          The orange wire with the green tracer is the supply and the pale blue goes back to the handlebar switch and on to the turn signals.
                          The third wire, dark blue goes to the TSCU and can be left in the plug iirc.
                          I don't recall if I had to switch the terminals around in the stock three pin plug to fit the two pin flasher. I think not.
                          97 R1100R
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                          80 GS850G, 79 Z400B, 85 R100RT, 80 Z650D, 76 CB200

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