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Thread: Turn signal control unit

  1. #1
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    Default Turn signal control unit

    Hi new to this forum
    I'm building a 1979 GS850 G custom and I'm at the dreaded rewire stage can someone please explain how to get rid of the turn signal control unit and just use manual turn signals, not using standard speedo or turn signals.
    thanks any help would be greatly appreciated.

  2. #2
    Nessism's Avatar
    Nessism is offline Forum LongTimer GSResource Superstar
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    There is a guide somewhere in the archives. It was made by someone who did it for the GS1000 but I think the 1979 850 is the same. The controller for those bikes was a one year wonder that broke down with regularity.

  3. #3
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    Which archives? My TSCU is acting up as well... I need to check all of the electrical connections but I'd just as soon either get rid of the damn thing or find a modern replacement.

    Edit: I think this is it: https://www.mediafire.com/?ofnzy51uly4h6
    Last edited by eil; 07-25-2021 at 09:44 AM.

  4. #4
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    Yeah I had 2 GS850 parts bikes and got a GS1000, all 79's and one was gone, the other two no good. Seems like they fail on the right signal. I read a few posts that mentioned that, one did nothing and the other one of mine worked only on the left. Search on TSCU brings up the whole sad story about these things. The fix is cheap and easy, and free for me as it's just a spare flasher wired in.

    But it's not really a good solution, as the you either have to (a) keep the return spring in the switch and hold it L/R to actuate the blinker, or (b) take the return spring out, which is fiddly but doable, and then it will hold in place but not reliably or solidly. Neither is very good.
    Tom

  5. #5
    Nessism's Avatar
    Nessism is offline Forum LongTimer GSResource Superstar
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    Start bugging Rusty Bronco (Dale) to get busy on his microprocessor driven custom TSCU for those early bikes. He's wasting all his time on dumb house projects these days instead of prioritizing on motorcycle projects like he should! Maybe peer pressure will help motivate him...

  6. #6
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    Eli69 is offline Forum Sage Past Site Supporter
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    I made a little unit with 2 double relays that works like the tscu except for the auto shut off. It works with the original hand control. I made a thread about it with a schematic. I'll try to find it.

    Otherwise you probably need a different left hand control switch.
    1986 yamaha fazer 700 - sold, finally
    2002 bmw r1150gs 1978 gs1000E skunk les pew 1979 gs1000L dragbike
    https://m.youtube.com/watch?fbclid=I...ature=youtu.be
    82 gs1100L probably the next project
    1980 gs1000G the ugly 1978 gs750E need any parts?
    1978 gs1000E skunk #2 RLAP

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