BMW K bikes (Bricks)

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1Back to top Go down    Random headlight issue on Fri Nov 10, 2017 4:37 pm

TheJoker

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I've got an 87 k100 rs that is currently suffering from a weird issue. Basically you can be riding along with low beam on and it will go off randomly. If I press the flash (for high beam) the light will come back on though. Also when riding I can put high beam on and the headlight will stay on all the time.

I've checked and replaced the headlight bulb, checked the earths on the bike and cleaned them up also checked behind the right hand switch and cleaned that up. Just wondering if anyone has any advice for what to look at next. It seems like a loose connection somewhere possibly but I doubt that will explain why high beam will stay on all the time.


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My Bike List past to present so far;

Lexmoto (first bike ever to ride) , CB125 TDC 86 , CG125 89 , GN125 97 , ER5 96 , K100 RS 84

84/01 K100rs 0013627
    

2Back to top Go down    Re: Random headlight issue on Fri Nov 10, 2017 5:17 pm

Laitch

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@TheJoker wrote:I've got an 87 k100 rs that is currently suffering from a weird issue. Basically you can be riding along with low beam on and it will go off randomly. . . also checked behind the right hand switch and cleaned that up. Just wondering if anyone has any advice for what to look at next.
If the dimmer switch contacts haven't been checked, that's what I'd check next if it were my bike. Is that switch on the left side of the bar in the UK?


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1995 K75T 68,000 miles
    

3Back to top Go down    Re: Random headlight issue on Fri Nov 10, 2017 5:20 pm

robmack

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If your bike is fitted H4 halogen lamps greater than 55W/60W, it could be drawing too much current through the switch contacts, causing the contactm to heat up and shift position inside of the headlight switch. If that is the case, the remedy is to fit a headlight relay.


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Robert
1987 K75 @k75retro.blogspot.ca
2011 Moto Guzzi V7 Racer
http://k75retro.blogspot.ca/
    

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