BMW K bikes (Bricks)

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1Back to top Go down   Battery light on very dimly Empty Battery light on very dimly Mon Aug 08, 2011 3:17 pm

SittingDuck

SittingDuck
active member
active member
I had never noticed it before.
The battery light is on (but very dimly; there's no way to notice it in daylight). It gets brighter (but still dimmer than when it's supppsed to be on) when the brakes are applied or the turn signals used.

The bike recently got a new battery; could that be related?

IS the dim battery light a problem (it turns on nice and bright with the ignition on and the engine off)?
How do I go about diagnosing/fixing it?


__________________________________________________
1985 BMW K100 RS (0040995)
2008 Suzuki Vstrom DL650A
    

2Back to top Go down   Battery light on very dimly Empty Re: Battery light on very dimly Mon Aug 08, 2011 3:32 pm

Avenger GT

Avenger GT
Life time member
Life time member
Don't worry about it, it's a common thing with early Ks. Just to be sure that it is charging properly connect a multimeter set to 20 volt range across the battery. Start the bike and rev to 2500 rpm. Battery voltage should be around 14 volts.

    

3Back to top Go down   Battery light on very dimly Empty Re: Battery light on very dimly Mon Aug 08, 2011 6:53 pm

charlie99

charlie99
VIP
VIP
aye avenger ....same with me


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OBattery light on very dimly Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

4Back to top Go down   Battery light on very dimly Empty Re: Battery light on very dimly Mon Aug 08, 2011 8:40 pm

RicK G

RicK G
admin
admin
Sometimes new brushes and a clean of the commutator can stop it but if it is charging let the sleeping dog lie.


__________________________________________________
"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
    

5Back to top Go down   Battery light on very dimly Empty Re: Battery light on very dimly Tue Aug 09, 2011 2:56 am

pjjms

avatar
Silver member
Silver member
mine does that also. BMW issued a service bulletin to fix it which involved fitting a diaode. But the charging system works fine even with the light on dimly. Don't worry about it.

    

6Back to top Go down   Battery light on very dimly Empty Re: Battery light on very dimly Tue Aug 09, 2011 5:15 am

blaKey

avatar
Life time member
Life time member
If ya really want to fix it...

Installation of Diode:
Diode--part no. 61 31 1 358 268--can be installed near the alternator.
Cut the blue wire approximately 2 inches from the plug-in connection at
the alternator and splice in the diode. The diode and splice connections
must be protected from elements with heat-shrink tubing or electrical tape.
OR The diode can be spliced into the blue wire inside the electrical
equipment box under the rear of the fuel tank.

Direction of Diode:


The arrow on the diode must face towards the alternator.


__________________________________________________
Neil
K100RS 1986 RED!

Dress for the ride and the potential slide.
    

7Back to top Go down   Battery light on very dimly Empty Battery light on very dimly Tue Aug 09, 2011 5:35 am

Dennis

Dennis
Platinum member
Platinum member
Nah,............ don't worry 'bout it, mine did that too. Check the charge voltage (engine above 1500 rpm), if she's around 14v go for a ride, get a smile on ya dial, then come back and have a stubby. Never aproblem with my olk RT, could leave her for 4 weeks in winter and she'd start easy. Only ever left her idle for that long once, and only because I was away. My rule - must ride the old girl at least once a week.

    

8Back to top Go down   Battery light on very dimly Empty Re: Battery light on very dimly Tue Aug 09, 2011 5:48 am

charlie99

charlie99
VIP
VIP
agree there dennis ....its a fantasic feeling to swing the leg over at the end of a hard week ....and go for a cruise





or you can go down to the local jaycar or other electronics outlet and buy a in5404 diode for about 30 cents blakey


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OBattery light on very dimly Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

9Back to top Go down   Battery light on very dimly Empty Re: Battery light on very dimly Tue Aug 09, 2011 5:50 am

blaKey

avatar
Life time member
Life time member
Thanks Charlie, I'll keep that in mind.


__________________________________________________
Neil
K100RS 1986 RED!

Dress for the ride and the potential slide.
    

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