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79' 1000S self cancelling bypass mod

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Hey all, Glenn and I are diagnosing his turn signal issues on his 79 1000S and it looks like the self canceller is the issue. His front brake light and his left turn signals won't work and it's all pointing to that thing. I can't find the link or thread about how you replace it with a flasher unit. I remember doing it on my 79 850 a long time ago but need the thread, can someone point us in the right direction, thanks.
 
azr said:
Hey all, Glenn and I are diagnosing his turn signal issues on his 79 1000S and it looks like the self canceller is the issue. His front brake light and his left turn signals won't work and it's all pointing to that thing. I can't find the link or thread about how you replace it with a flasher unit. I remember doing it on my 79 850 a long time ago but need the thread, can someone point us in the right direction, thanks.
Click to expand...

Don't think the first generation Turn Signal Control Unit (TSCU) being bad has anything to do with the front brake light.
Do believe Dale (Rustybronco) has the bypass or modification schematic for the turn signals.
 
A failing TSCU can cause one side or the other turn signal not to flash or flash inconsistently. If one side flashes, the flasher itself is all right. Clean all the grounds and sockets associated with the turn signals because it won't flash unless it feels the load of both bulbs. I removed my TSCU and installed two flashers on the wires in the 4 pin plug and have gotten used to just using them manually. They always work and I never leave them on because you have to hold the switch to have them work. I believe it was Rustybronco who posted a schematic to latch the turn signals with relays. It will work, and a timer circuit could be used to break the latching relay if you wanted self canceling like the original TSCU. I haven't had time to do this yet, and to tell the truth you get used to holding the switch and clutching at the same time, so I may not do it until my son has enough money to start rebuilding his 850G that has the same TSCU and problems as mine did. The front brake switch is a separate problem. It is under the front brake lever and can be cleaned, but I preferred to replace mine with a banjo bolt type pressure switch on the front master cylinder.
 
Last edited:
Yes, Glenn figured out that the front brake light had nothing to do with the signals, I was testing the wrong wires:rolleyes:. So the front brake light is fix but Glenns still having issues with the signals. I'm not exactly sure what you meant by attaching flashers. On the 79' there is a 4 prong and a 6 prong. I do seem to remember there was a step by step mod for it, it must be somewhere on here.
 
azr said:
Yes, Glenn figured out that the front brake light had nothing to do with the signals, I was testing the wrong wires:rolleyes:. So the front brake light is fix but Glenns still having issues with the signals. I'm not exactly sure what you meant by attaching flashers. On the 79' there is a 4 prong and a 6 prong. I do seem to remember there was a step by step mod for it, it must be somewhere on here.
Click to expand...

There have been many threads on this issue, but luckily I found a unit eventually that did work.
But that was after going through many that didn't.
100_1825_zpsf8593e6d.jpg
 
Thanks Dale, just what I was hunting around for with not much luck. We actually got the stock one working but it only last 5 miles before it stopped working again :D time for a flasher.
 
I'm surprised you haven't come up with a replacement unit yet Dale. I have other relay mods, so I was planning to make a plate in the TSCU location so I could mount the relays on plug in blocks to get them all in a consolidated location and make a waterproof cover. That way I could carry spares for easy replacement and mark everything so I don't forget what I did (an everyday battle when you are pushing 66). I haven't received my proverbial "Round_To_It" yet, so it remains in the planning stages and like I said I've gotten used to using turn signals manually and using the clutch handle at the same time (good arthritis exercise). When I do get it done, I'll post up a schematic if someone else hasn't come up with a replacement TSCU before that.
 
I guess I have been real lucky with my 78 GS flashers. The flashers work as they should, but the self cancelling part doesnt work. I simply press down on the button to turn them off.

Since those units are so expensive, I was "thinking about" adding a beeper to the signal to remind me because sometimes in full sun it is hard to see the blinker in the dash.
 
Gregory said:
I guess I have been real lucky with my 78 GS flashers. The flashers work as they should, but the self cancelling part doesnt work. I simply press down on the button to turn them off.

Since those units are so expensive, I was "thinking about" adding a beeper to the signal to remind me because sometimes in full sun it is hard to see the blinker in the dash.
Click to expand...

No doubt about it, the sun making the blinking light hard to see, which is why those out there in use that don't self cancel I consider extremely dangerous for that reason. Now those self cancelling ones were used on the "E" models. The "C" model doesn't have self cancelling and does in fact have a "buzzer" beeper or whatever installed on it, '78, '79 models that is.
And they're still available for about $19 plus shipping @ Boulevard Suzuki.
Items 12-1, and 12-2 on this parts fiche. (The new part supercedes two older part numbers, scroll down on the parts listing to see it.)
http://www.boulevardsuzuki.com/fich...y=Motorcycles&make=SUZUKI&year=1978&fveh=2146
 
sedelen said:
No doubt about it, the sun making the blinking light hard to see, which is why those out there in use that don't self cancel I consider extremely dangerous for that reason. Now those self cancelling ones were used on the "E" models. The "C" model doesn't have self cancelling and does in fact have a "buzzer" beeper or whatever installed on it, '78, '79 models that is.
And they're still available for about $19 plus shipping @ Boulevard Suzuki.
Items 12-1, and 12-2 on this parts fiche. (The new part supercedes two older part numbers, scroll down on the parts listing to see it.)
http://www.boulevardsuzuki.com/fich...y=Motorcycles&make=SUZUKI&year=1978&fveh=2146
Click to expand...

Thanks for the info... mine is an E
 
sedelen said:
There have been many threads on this issue, but luckily I found a unit eventually that did work.
But that was after going through many that didn't.
100_1825_zpsf8593e6d.jpg
Click to expand...

Wow that thing is a real monster. :eek:

So is everybody looking for a form fit function replacement (i.e. looks just like the original)?

It would be relatively easy to make a device that has screw terminals and you just cut off you old connectors and move the wires to the screw terminals.
 
Does anyone know how to confirm if my 1978 gs1000e has the CORRECT speedometer to work with the self cancelling units?

((... if your self cancelling function doesn't work of course))

I have changed out my speedo (for accuracy reasons)...and also have several other speedos but do not know how to tell them a part. They are all 140 mph
 
The 1980 USA spec 'E' models had the reed switch but had a 85 mph speedo.
 
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