BMW K bikes (Bricks)


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BlueBrick-75RT

BlueBrick-75RT
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Intermittently I get a 4 way turn light activation without using the emergency switch. It can be reset by hitting the indicator off switch on the right handlebar,  but that's a bit of a fumble and takes time and attention away from a left hand turn. 

I've been advised to clean the switch but I'm not sure if that requires removal of the switch or it can be done on the handlebar.

    

2Back to top Go down   Left Turn Signal Switch Turns 4 Way Sometimes Empty Left turn signal Thu Sep 12, 2024 10:15 am

daveyson

daveyson
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Yep, could be the switch. If the horn works but also fails to work when the left turn signal goes to hazard mode, it seems to me that the problem would be an intermittent earth problem before the switch. In that case I'd clean the earth connections under the tank, or look at the left handlebar electrical plug, also under the tank.


__________________________________________________
11/1985 BMW K100RT (late model)  Vin. 0090567
 ~120,000 km
    

Laitch

Laitch
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A wire within the switch on the dash pad has likely broken from its soldered switch contact. Remove the switch from the dash pad, open the switch to verify and re-solder the wire to its contact if necessary. Instructions here for removal and disassembly of the switch.


__________________________________________________
1995 K75 90,000 miles
    

Dai

Dai
Life time member
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As Laitch says. That would be the first place I'd look too because it's a short cable under constant pressure from turning the handlebars.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

BlueBrick-75RT

BlueBrick-75RT
active member
active member
Laitch wrote:A wire within the switch on the dash pad has likely broken from its soldered switch contact. Remove the switch from the dash pad, open the switch to verify and re-solder the wire to its contact if necessary. Instructions here for removal and disassembly of the switch.
I believe your referring to the emergency flasher rocker switch on the dash pad.   I'm referring to the left turn signal on the left handlebar.  I'm not intending to turn on the 4 way enthralled lights,  just the left hand turn signals. 

As I said, this problem is intermittent.   Are you saying a bad or dirty 4 way rocker could be the reason for my handlebar switch turning on all 4 turn signals?

    

Laitch

Laitch
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Life time member
BlueBrick-75RT wrote:Are you saying a bad or dirty 4 way rocker could be the reason for my handlebar switch turning on all 4 turn signals?

I'm not intending to turn on the 4 way enthralled lights,  just the left hand turn signals.
Translation successful. cheers  It's easy enough to check.

Are you saying turning on all 4 signals only happens when the left turn signal is activated?


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1995 K75 90,000 miles
    

BlueBrick-75RT

BlueBrick-75RT
active member
active member
Yes but not always. Had it happen once today.

    

Dai

Dai
Life time member
Life time member
It's still worth checking the hazard switch. A broken wire can be giving you backfeed through the indicator relay and triggering the hazard circuit when you request a left turn, especially if you're on the move (road vibration). BMW made the indicator circuit over-complicated (sigh) - it's not a simple case of the hazard switch cross-connects the indicators on each side. That would have been too easy and not at all Teutonic.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

BlueBrick-75RT

BlueBrick-75RT
active member
active member
The Germans made something overly complicated? Say or isn't so! At least it's not French!

    

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