Turn signal problem - BMW R1200GS Forum : R1200 GS Forums
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post #1 of 14 (permalink) Old 23-Sep-2010, 03:04 PM (836) Thread Starter
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Turn signal problem

I've got a 2009 R12GS. The left front turn signal lamp is not working, and I'm a bit stumped as to the cause. The left bulb works when inserted in to the right turn signal, so it is not the bulb. The dash indicator and rear light illuminate, so it is not the switch. As far as I can tell they eliminated the individual fuses due to the CAN bus. Could it be some strange CAN bus behavior? Any suggestions on what to try next are appreciated.

Thanks,
Tom
Ann Arbor, MI
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post #2 of 14 (permalink) Old 23-Sep-2010, 03:12 PM (842)
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Welcome to the forum.

First of all, forget about the CAN-bus. In spite of the fact that it is blamed for everything and anything it is only a bunch of wires that the various controllers use to talk to each other. Nothing that you directly interact with -- switches, levers, lights, etc. -- have anything to do with the CAN-bus.

If the other blinkers are working your handlebar switch is fine. That leaves the ZFE (central chassis controller) which actually blinks the lights, the wiring to the troublesome blinker, or the mechanical connection.

I'd start by looking at the mechanical connection, making sure that you're getting a good mechanical contact to the bulb. Then I'd get out a multi-meter and see if voltage is being applied to the socket. If not I'd start tracing the wires back from the socket, looking for a place where they may be open or shorted.

But my bike is not under warranty. An '09 is, no? In your case I'd take the bike to the dealer and say "fix!".

Good luck.
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post #3 of 14 (permalink) Old 23-Sep-2010, 11:14 PM (176)
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Welcome tegel.

You have got three options: either follow Marc's advice, who is undoubtedly the ueber guru on the technical side of things. I usually don't understand most of what he explains, coz' I don't touch the bike. That is for the mechi to do. I ride.

Secondly: go faster than anybody else, so you don't need an indicator.

Third of all: sell the bike to South Africa - the concept of indicators is an alien one.......
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post #4 of 14 (permalink) Old 06-Aug-2011, 08:21 PM (056)
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I am having the same problem on my 2005 GS. The indicator on the dash does not light or the left front and rear lights. I am gonna unhook the battery and see what happens...

Last edited by harveymushmen; 06-Aug-2011 at 08:24 PM (058).
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post #5 of 14 (permalink) Old 30-Sep-2013, 01:05 PM (753)
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Quote:
Originally Posted by harveymushmen View Post
I am having the same problem on my 2005 GS. The indicator on the dash does not light or the left front and rear lights. I am gonna unhook the battery and see what happens...
hi
just registered on this site as i am having the same problem with my 05 bike
did you find out what was wrong with yours
al
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post #6 of 14 (permalink) Old 30-Sep-2013, 01:49 PM (784)
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left side turn signal

Hi
my bike has developed the same problem did you have any luck with yours
alan
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post #7 of 14 (permalink) Old 21-Mar-2014, 08:41 AM (570)
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Thumbs down left turn indicator do not work.

Good day all

I'm new to the forum but not new to biking.
i have a R120gs 2006 modul
Problem I'm having looks like one that happens allot!!!
Left front rear indicators do not work no dash indication either.
what i have done is to check the globes they are ok. i activated the left indicator and tested for voltage 0vdc.
i also checked the conection( plug ) in die left handle bar unit could not see anything wrong

did anyone else sort out the issue and what was it.

regards

Reinhardt Jansen
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post #8 of 14 (permalink) Old 21-Mar-2014, 10:12 AM (633)
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Hello Reinhardt

There is a subminiature switch in the left switch plate. This component won't
work. Usually the rubber gasket of this switch is damaged and there is an invasion of water.
Either a new one or disassemble and try to clean it. Just as well, you can mount a used switch.
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post #9 of 14 (permalink) Old 21-Mar-2014, 11:54 AM (704)
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thanks

i will have a look at that. bike was in for a service and they washed it i think with a power washer and well the rest is history.
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post #10 of 14 (permalink) Old 21-Mar-2014, 11:57 AM (706)
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Quote:
Originally Posted by schuppi View Post
Hello Reinhardt

There is a subminiature switch in the left switch plate. This component won't
work. Usually the rubber gasket of this switch is damaged and there is an invasion of water.
Either a new one or disassemble and try to clean it. Just as well, you can mount a used switch.
will I be able to change only the switch or should I try and get a complete switch assembly ( with trip abs light)
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