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Turn signal self-cancel (yes, I've searched!)

  • Thread starter Thread starter RichB
  • Start date Start date
R

RichB

Guest
'79 GS850GN UK spec. While stationary my turn signals switch off after 12/13 flashes, then refuse to do anything for 8/9 seconds, then work again for 12/13 flashes etc. etc. Consistently! Switching from left to right still results in a combined 12/13 flashes, then nothing for 8/9 seconds.

I've had a search and couldn't find similar symptoms or solutions (voltage sensitivity?). Disconnecting the speed sensor doesn't change anything.

In the absence of a cure can anyone tell me how to bypass the self-cancel unit.

Many thanks

Rich
 
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Do you have a repair manual? If you don't, get one. I have 3 - a Suzuki shop manual, a Clymers, and a Haynes - and I think they all have detailed instructions on troubleshooting those switches. It may have a bad connection somewhere, require a good cleaning, or need to be replaced. If it's the latter, try what mark suggested that Renobruce did - turn it into a manual.

If you do take it apart, be careful and don't lose any of the the springs. Don't ask me how I know.
 
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emjay said:
If you do take it apart, be careful and don't lose any of the the springs. Don't ask me how I know.
Click to expand...

Oh great, now you tell us....

By losing the one side to side spring I made my auto cancel switch into a manual. Thats a tough thing to get use to after 25 years. DONT forget to turn it off after the turn. We lost a biker up here this summer because of that.
 
Hmmm. On my '83 1100 the self cancel kicks in sooner the hotter the bike gets, but if I flip the switch again it will stay on and has to be cancelled manuelly...man-u-alley...manualy. I'm used to it now so it does not bother me...every time.
 
Many thanks guys

I reckon I'll wait for a manual cancel switch or another control box on ebay. The boxes come up fairly regularly (probably beacuse they're knackered as well!)

Rich
 
Standard Connectors

Standard Connectors

Does anyone know the manufacturer and part number for the 4 pin and 6 pin connectors on the turn signal control unit? Or alternatively where I can find out? I presume they're the same on all of these turn signal control units.

I have a similar problem with my 79 GS850GN and was amazed at the sticker price for a new unit. Being an electronics design engineer with a large blue chip company whose expertise is embedded contollers I figured I'd make my own, keep my money and have some fun as well. It's all prototyped and working ready to design my circuit board and fit into the target enclosure. The only parts I've not been able to narrow down so I can make this a plug and play unit are the connectors.

Can anyone help with that?
 
Thanks for the suggestion Steve. I've taken a look but the Hitachi ones are locking type like found under the tank. The connectors on the turn signal controller are a different type... of course!! Maybe I'll take a picture and see if posting that would help.
 
I ditched my self canceling setup and replaced it with a push-to-cancel switch from a '92 GSXR 750. The wiring is pretty easy and you don't have to chop up your main wiring harness. Best of all push-to-cancel eliminates fumbling for the middle switch position.
 
Hi,
Maybe I am too late with this reply, but these turn canceling units have a sensor in the speedometer and sense when the speed drops below 14km/h and then switches the turn signal off after 9 seconds.
The flasher unit is a 3 wire device with one wire used to the self canceling device. You can cut out the self canceling unit by just plugging in a 2 pin flasher unit without modifying any of the bikes wiring. And check that the speed sensing unit is working and the signal is arriving back at the SCU before suspecting it as faulty. The usual connector problem is sometimes the cause of malfunctioning here.
 
Hi,
Maybe I am too late with this reply, but these turn canceling units have a sensor in the speedometer and sense when the speed drops below 14km/h and then switches the turn signal off after 9 seconds.
The flasher unit is a 3 wire device with one wire used to the self canceling device. You can cut out the self canceling unit by just plugging in a 2 pin flasher unit without modifying any of the bikes wiring. And check that the speed sensing unit is working and the signal is arriving back at the SCU before suspecting it as faulty. The usual connector problem is sometimes the cause of malfunctioning here.
 
Hi RJ,

My '78 GS1000 has a dodgy self cancel indicator control unit it seems (it only indicates right side - i have i think eliminated the switch and wires as faulty).

How do you bypass this i.e. the 4 and 6 pin connections on the harness - you mention you did this? Do i need to bridge the connection? Which wires?

Cheers:-D
 
Sorry folks - i didnt see Matchless's reply until just now - i will try as he says thanks.8-[
 
Self cancel indicators are easily fixed!!! find the self cancel unit!! Un-plug it and throw over left shoulder, Taa-Daa you are left with standard indicators that you manually cancel.
All five of my GS's have been suitably "up-graded" for many years with no issues.

Dink
 
Dink said:
Self cancel indicators are easily fixed!!! find the self cancel unit!! Un-plug it and throw over left shoulder, Taa-Daa you are left with standard indicators that you manually cancel.
All five of my GS's have been suitably "up-graded" for many years with no issues.

Dink
Click to expand...

Dink,
You are so right - my bad! I had forgotten that I replaced my flasher unit with one that was not current(load) sensitive at the time I worked on it and recall now that the flasher unit worked with the TSCU unplugged after I got a wiring problem sorted out. Obviously if the flashers do not work normally when ther TSCU is unplugged, then something else is wrong!
Apologies if I confused someone else here.
 
Thanks for the info - but - if i unplug the indicator control unit it seems that there is no longer power going to the flasher relay unit (and hence no flashing). Do i need to supply a power source to it.
Also i checked my flasher unit - it is the 2 pin type, not 3 pin.

My ICU has two small coils in it, one appears OK and the other has apparently had a mini meltdown.

Consequently oerating the switch is fine for one side but not the other - i am assuming that one coil is for left and one for right (right??).

The wires coming to the ECU are one 6 connector with orange,blue/red,black/white,light blue, brown/yellow and black and red wires feeding it. The other is a 4 conector with light green, light green/black, and two plain black wires.

I have a downloaded factory wiring diagramme but this is confusing, so i am assuming that cutting the wires off the ECU and connecting a combination of relevant wires from the two plugs will complete the circuit?

Anyone know?

I have powered both indicator circuits and can get either side to light up so i think that the ECU is the only fault.

Cheers
 
I overlooked Marks attached solution on p1 - will do this!!!. Should have read it properly the first time. Will go back to my cave.

I recently restored my GS1000 E 1978, new RR = stator
as recommended, new bearings seals, paint throughout, new tyres, generator side cover, clutch springs, brakes completely overhauled, new braided hoses, fuel tap (has been re fitted with an 80 tank now). Was down on power but doing the shims fixed this (nil clearance on most), progressive springs, Ikon damping adjustable shocks. It is a nice handling bike now and relaxing and comfortable.

Pic attached hopefully.

Thanks
 
Mine had same problem, search for renobruce he has a post titled 78-79 GS1000 auto to manual turn signal fix . you have to replace your turn signal switch with a manual switch
and easy fix .Just have to remember to turn off blinkers . Rob




Jackbob said:
Hi RJ,

My '78 GS1000 has a dodgy self cancel indicator control unit it seems (it only indicates right side - i have i think eliminated the switch and wires as faulty).

How do you bypass this i.e. the 4 and 6 pin connections on the harness - you mention you did this? Do i need to bridge the connection? Which wires?

Cheers:-D
Click to expand...
 
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