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    #1

    Auto-cancel

    Everything on my bike works, except for one thing. I have to manually cancel the turn signals. What should I do to trouble shoot this issue? Manually cancelling isn't a big issue to me, but I really want everything to work. Any ideas are appreciated, thanks.
    https://drive.google.com/open?id=0B9zH8w8Civs8ejBJWjdvYi1LNTg&resourcekey=0-hlJp0Yc4K_VN9g7Jyy4KQg&authuser=fussbucket_1%40msn.com&usp=drive_fs
    1983 GS750ED-Horsetraded for the Ironhead
    1981 HD XLH

    Drew's 850 L Restoration

    Drew's 83 750E Project
    Tags: None
    #2
    There's a reed switch on the speedo that needs to be working. I've seen some that had the glass tube broken. Also make sure that the relay wasn't changed out with the two prong automotive type. Using those will work allow the lights to flash but will disable the auto-cancel feature.
    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

      #3
      Inside?

      Originally posted by JTGS850GL View Post
      There's a reed switch on the speedo that needs to be working. I've seen some that had the glass tube broken. Also make sure that the relay wasn't changed out with the two prong automotive type. Using those will work allow the lights to flash but will disable the auto-cancel feature.
      I'll check that relay. As for the reed switch, is it inside the speedo housing?
      https://drive.google.com/open?id=0B9zH8w8Civs8ejBJWjdvYi1LNTg&resourcekey=0-hlJp0Yc4K_VN9g7Jyy4KQg&authuser=fussbucket_1%40msn.com&usp=drive_fs
      1983 GS750ED-Horsetraded for the Ironhead
      1981 HD XLH

      Drew's 850 L Restoration

      Drew's 83 750E Project

      Comment

        #4
        It's attached to the outside of the speedo housing.
        De-stinking Penelope http://thegsresources.com/_forum/sho...d.php?t=179245

        http://www.thegsresources.com/_forum...35#post1625535

        Comment

          #5
          Most likely you need a new TSCU. They fail sometimes. You can find them for cheap on ebay or maybe post in the WTB forum. They are a common part servicing several models so you can find them easily enough.
          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

            #6
            Aftermarket turn signals or bulbs can cause this problem using different watt bulbs. They have to be correct or they won't pulse so folks put in an automotive relay. Make sure this is not the issue first.
            If it is not the issue I have good TSCU boxes.
            1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
            1985 GS1150ES stock with 85 Red E bodywork.

            Comment

              #7
              Thanks guys

              Originally posted by chef1366 View Post
              Aftermarket turn signals or bulbs can cause this problem using different watt bulbs. They have to be correct or they won't pulse so folks put in an automotive relay. Make sure this is not the issue first.
              If it is not the issue I have good TSCU boxes.
              Thanks everyone. I'll check all this stuff tomorrow first, and if it is the TSCU, I'll send you a pm chef.
              https://drive.google.com/open?id=0B9zH8w8Civs8ejBJWjdvYi1LNTg&resourcekey=0-hlJp0Yc4K_VN9g7Jyy4KQg&authuser=fussbucket_1%40msn.com&usp=drive_fs
              1983 GS750ED-Horsetraded for the Ironhead
              1981 HD XLH

              Drew's 850 L Restoration

              Drew's 83 750E Project

              Comment

                #8
                What a dummy - me

                Well, can't blame everything on the PO. Over the winter, I replaced a bunch of wiring connectors. Turns out, I mixed up the wires on the harness side of the TSCU. Swapped them back around to the correct slots and BINGO! Everything works as it should. Now I have an extra TSCU if anyone needs one.
                https://drive.google.com/open?id=0B9zH8w8Civs8ejBJWjdvYi1LNTg&resourcekey=0-hlJp0Yc4K_VN9g7Jyy4KQg&authuser=fussbucket_1%40msn.com&usp=drive_fs
                1983 GS750ED-Horsetraded for the Ironhead
                1981 HD XLH

                Drew's 850 L Restoration

                Drew's 83 750E Project

                Comment

                  #9
                  Yep

                  Originally posted by Nessism View Post
                  Most likely you need a new TSCU. They fail sometimes. You can find them for cheap on ebay or maybe post in the WTB forum. They are a common part servicing several models so you can find them easily enough.
                  I think that's the problem, almost for sure. I've changed mine twice and always keep a spare for when it happens again.

                  Just as a matter of interest, I've noticed that they don't quit working all at once. They seem to work sporadically before 'giving out' completely.
                  1980 GS1100E, the latest of many.

                  Comment

                    #10
                    I hate that feature. Before I bypassed mine on my 850, I had them cancel more than once while I was waiting to make a left hand turn. NOT kosher...

                    Comment

                      #11
                      Originally posted by JMHJ View Post
                      I hate that feature. Before I bypassed mine on my 850, I had them cancel more than once while I was waiting to make a left hand turn. NOT kosher...
                      I've never had that happen with the 2nd generation TSCU. Failure with those is they don't cancel, not cancel too early.
                      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

                        #12
                        Originally posted by Nessism View Post
                        I've never had that happen with the 2nd generation TSCU. Failure with those is they don't cancel, not cancel too early.
                        Maybe I signaled too quick... or there was tons of traffic

                        Only one I've ever had was on my '83 model.
                        Last edited by Guest; 06-21-2014, 10:11 PM.

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