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"KRS/GT" Technical Q&A K1200RS/GT Technical Questions/Answers

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  #1  
Old 06-11-2018, 12:47 PM
Jnovak01 Jnovak01 is offline
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Left Turn Signal Inquiry

Hello All

Coming Back from Americade my left hand turn signal would not function. The right one was fine, but the left one was out.

Four Way Emergency Flashers worked fine so I was thinking the left hand switch could be a likely culprit for root cause.

Then when I was almost home the left hand turn signals worked fine.
I am thinking it could be an intermittent fault with the left hand switch possibly due to corrosion? I do not suspect moisture as the last week the weather has been very dry in the Northeast.

Any ideas/thoughts?

thank you
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  #2  
Old 06-11-2018, 12:54 PM
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Pete_Tallahassee Pete_Tallahassee is offline
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Re: Left Turn Signal Inquiry

1) Hit it with a hammer. If it does not fix it it's an electrical problem.
2) Just ignore it since it is now fixed.
3) Wait for someone who is not a smart ass to give an intelligent reply.
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  #3  
Old 06-11-2018, 01:57 PM
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Re: Left Turn Signal Inquiry

What year is your bike? It might make a difference, but from what you are saying the likelihood is that that contacts in the switch are dirty or corroded. Likely you may have to disassemble the left hand grip components and take a look at the electrical contacts.
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Old 06-11-2018, 03:25 PM
Jnovak01 Jnovak01 is offline
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Re: Left Turn Signal Inquiry

Thanks for the reply.


The Bike is a 98.
I share your suspicion as well - the contacts are dirty or corroded.

I have had that happen on a previous bike but none of the BMW's I own.
Many times these switches are not serviceable, though I have opened micro-switches before, put them back together....and they still worked.
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Old 06-12-2018, 06:48 AM
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Re: Left Turn Signal Inquiry

Soak it in WD40 - never fails.
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Old 06-12-2018, 08:55 AM
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Re: Left Turn Signal Inquiry

Contacts in them switches are very thin brass.And I mean thin....!Any corrosion?Will make them even thinner and I doubt they can be cleaned/repaired.

Been there "on the road" repairing the R/H side.Turn signal was coming on randomly.Altough I could pop open the switch,clean it and managed to close it which is not an easy feat,it only worked long enough to go East and then bring my bike back West,about 10Ks?

So last winter transplanted a micro switch from another switchgear into mine.Two actually,the cancel switch was also sticky so did that one at the same time.
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Old 06-12-2018, 12:25 PM
Jnovak01 Jnovak01 is offline
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Re: Left Turn Signal Inquiry

Thank you both.
Performing surgery on a switch when on the road sure does sound like a feat.

I will take apart the switch this weekend if I have the time and post some pics.


Stay tuned.....
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Old 06-12-2018, 02:21 PM
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Re: Left Turn Signal Inquiry

East Longmeadow Mass, yep, that's the problem!
I grew up in a small horse town abutting EL.
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Old 06-13-2018, 08:40 AM
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Re: Left Turn Signal Inquiry

You can buy similar switches and replace yours,Digikey part number is in the video:

https://youtu.be/cXZ5qLpBHQE
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Old 06-13-2018, 12:44 PM
Jnovak01 Jnovak01 is offline
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Re: Left Turn Signal Inquiry

pbegin: Thank you a TON!
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  #11  
Old 06-18-2018, 07:22 AM
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Re: Left Turn Signal Inquiry

Former aerospace electrical system engineer here.

Possible gremlins in the wiring, which is typical of wiring around the front end. Check routing of wiring and reconfigure bundle ties as appropriate. If the ties are too restrictive the bundles can become damaged.

Hint: Only ties closest to connectors or fittings should be tight and restrictive. Otherwise, bundle ties of front-end wiring should spaced further apart and be less restrictive overall. That is, slightly loose and strategically placed.

Also consider using Deoxit on bundle connectors.

-AJ
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