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1Back to top Go down   K75 Bulb warning light Gremlin Empty K75 Bulb warning light Gremlin Thu Mar 10, 2022 2:14 am

jjefferies

jjefferies
Life time member
Life time member
Hi All, Had an interesting little gremlin pop up the other evening.The red bulb warning light, the one that goes out after you hit the front and rear brakes as a test, would blink on briefly. I specify evening as the blink is very quick and faint and might be missed during full sunlight. Of course normally the light popping on means that the brake bulb is failing or has failed. But this would only happen after a ride and when I squeezed the front brake lever never for the rear. And it would just barely blink and then go off again, i.e. meaning the brake bulb was operational.  I've taken the bulb out and cleaned the contacts thinking maybe it was vibration dependent. But I could get it to do it even when the engine was off but power was on. And as I said it would happen only if I hit the front brake and not for the rear brake.

So I would suspect the lead coming from the front brake. Any suggestions as to where to check?

best regards
J.Jefferies

    

2Back to top Go down   K75 Bulb warning light Gremlin Empty Re: K75 Bulb warning light Gremlin Thu Mar 10, 2022 4:32 am

K75cster

K75cster
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Life time member
Maybe pull the relay for the ABS and see if it still wants to flash at you. May be related to that.


__________________________________________________
Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

3Back to top Go down   K75 Bulb warning light Gremlin Empty Re: K75 Bulb warning light Gremlin Thu Mar 10, 2022 8:26 am

Dai

Dai
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WD40 or similar into the front brake switch. They do corrode up.


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

4Back to top Go down   K75 Bulb warning light Gremlin Empty Re: K75 Bulb warning light Gremlin Thu Mar 10, 2022 8:53 am

Point-Seven-five

Point-Seven-five
Life time member
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It's normal if it just flashes for an instant when the brakes are first applied.  It's an instantaneous pulse in the bulb monitor.  It is more pronounced if you have LED's in the instrument cluster.

It's part of the bike's charm.  Nothing to worry about.


__________________________________________________
Present:
1994 K75RT
1991 K100RS


Past:
1988 K100RS SE
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

5Back to top Go down   K75 Bulb warning light Gremlin Empty Re: K75 Bulb warning light Gremlin Thu Mar 10, 2022 8:02 pm

jjefferies

jjefferies
Life time member
Life time member
Point-Seven-five wrote:It's normal if it just flashes for an instant when the brakes are first applied.  It's an instantaneous pulse in the bulb monitor.  It is more pronounced if you have LED's in the instrument cluster.

It's part of the bike's charm.  Nothing to worry about.
That's puzzling as my other K75 doesn't do the same and it only happens when I hit the front brakes. As I mentioned earlier, I have been suspecting a loose connection, not unusual on an older (1991) bike.

    

6Back to top Go down   K75 Bulb warning light Gremlin Empty Re: K75 Bulb warning light Gremlin Thu Mar 10, 2022 10:38 pm

92KK 84WW Olaf

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Have had that ona few Ks and it was a poor connection at the rear brake light bulb. A thorough clean of the bulb to bulb holder contacts and eventually a bulb change solved it.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 40,490 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

7Back to top Go down   K75 Bulb warning light Gremlin Empty Re: K75 Bulb warning light Gremlin Thu Mar 10, 2022 10:58 pm

RicK G

RicK G
admin
admin
92KK 84WW Olaf wrote:Have had that ona few Ks and it was a poor connection at the rear brake light bulb. A thorough clean of the bulb to bulb holder contacts and eventually a bulb change solved it.
I had a similar experience with my K100, it was a bad connector in the brake light circuit.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

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