BMW K bikes (Bricks)

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1Back to top Go down   charging light Empty charging light Tue Apr 20, 2021 3:49 pm

moriarti

moriarti
Life time member
Life time member
OK when starting from cold symptoms of low battery, slow cranking speed once started and run for a while will restart as normal. On last start-up charging light stayed on about half strength even when reved high. Alternator tested and found to be in good condition Starter removed and bench tested, Battery test shower 12.8v
when starter ran battery dropped by1.6v Starter ran smooth without undue effort.
when reassembled if problem persists what may be the  cause help and suggestions much appreciated Very Happy Very Happy Chatter


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1984 k100 rs red/black VIN  0004449
    

2Back to top Go down   charging light Empty Re: charging light Tue Apr 20, 2021 5:40 pm

Dai

Dai
Life time member
Life time member
Starter removed, stripped, cleaned and bench tested.

You missed a bit Very Happy . Seriously though, you're describing a worn brushes problem.


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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
    

3Back to top Go down   charging light Empty Re: charging light Tue Apr 20, 2021 5:53 pm

robmack

robmack
Life time member
Life time member
check condition of the positive lead from the alternator to the battery.  Terminals clean, no corrosion?  Terminals intact, no rotted terminals from battery acid or oxidation?  Positive cable intact, no breakage of strands within the cable?

What about battery ground cable.  Good contact with transmission? Good contact with battery?  Cable intact?


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Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

4Back to top Go down   charging light Empty Re: charging light Wed Apr 21, 2021 12:06 pm

moriarti

moriarti
Life time member
Life time member
Thanks to you both number one best mate with good eyes is on cable testing/cleaning, Starter is with man in large shed, me im on coffee duty Very Happy Very Happy I will post results when finished charging light 112350


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1984 k100 rs red/black VIN  0004449
    

5Back to top Go down   charging light Empty Re: charging light Wed Apr 21, 2021 12:30 pm

Corkboy

Corkboy
Life time member
Life time member
That used to happen to my K100, the charge light would glow dimly,

Finally tracked it down to when the (aftermarket) heated grips were on.

bit of a long shot I know, but you just reminded me.


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Regards,

Corkboy '87 K100RS SE (The black one - one of the two bikes I'm sorry I sold)
             '87 K100RS 0140995 (Gone)
             '97 K1100LT 0188024 (Gone)
             '08 K1200GT Wedge - but still a K
             '08 Transalp 700
    

6Back to top Go down   charging light Empty Re: charging light Wed Apr 21, 2021 2:45 pm

Suzi Q

Suzi Q
Life time member
Life time member
Could be wrong, but isn't this the 'well-known' problem with voltage drop due to corrosion/age on the wire between the warning light and the alternator?


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Sometimes I'm not really Suzi Quatro.
    

7Back to top Go down   charging light Empty Re: charging light Wed Apr 21, 2021 3:16 pm

Laitch

Laitch
Life time member
Life time member


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1995 K75 81,000 miles
charging light Usa-lo10
    

8Back to top Go down   charging light Empty Re: charging light Wed Apr 21, 2021 3:41 pm

Suzi Q

Suzi Q
Life time member
Life time member
That's the one!  cheers


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Sometimes I'm not really Suzi Quatro.
    

9Back to top Go down   charging light Empty Re: charging light Wed Apr 21, 2021 8:35 pm

Dai

Dai
Life time member
Life time member
That's... rather like using a sticking plaster instead of fixing the problem at source. affraid


__________________________________________________
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
    

10Back to top Go down   charging light Empty Re: charging light Sat May 01, 2021 10:59 am

moriarti

moriarti
Life time member
Life time member
To Conclude, Man in big shed says Starter in perfect working order, Put everything back together Bloody K STARTS AND RUNS PEFECTLY.  i can only think she didn't want to go ridding so threw a wobbly  Razz Razz


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1984 k100 rs red/black VIN  0004449
    

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