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Old 08-17-2012, 08:49 AM   #1
mqo233 OP
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charging problems

to all those guys out there

on an 05, 1200GS, this morning the battery light did not go off, the battery is fully charged, as I checked it with a volt meter, when running at idle, the voltage is 11.98 VDC, and at higher RPM, it drops to 11.96 VDC, most likely as the electrical load increases, so, I pulled the cover to check the belt, which is good, I ran the motorcycle with the cover removed and everything looks normal,

so, any ideas before I order an alternator?

James
Lafayette, Louisiana
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Old 08-17-2012, 10:23 AM   #2
mqo233 OP
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new alternator $675, and there is the overload wire???

any ideas?

where is John when you need another video?
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Old 08-17-2012, 10:33 AM   #3
JimVonBaden
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Pull the cables and clean then completely. Then start the bike and recheck. I assume you verified that the alternator belt is still there, right?

Jim
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Old 08-17-2012, 03:34 PM   #4
mqo233 OP
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yes I did verify the belt,

the cable to be cleaned, I assume you mean that hook to the alternator?

thanks

James
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Old 08-17-2012, 04:09 PM   #5
Mrmerlin
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not sure about this but if the regulator can be removed,
then you may have a worn brush that could be swapped out ,
if not then maybe just install a fresh regulator.
of course it could be a loose wire as the alternator isnt charging,
you should see 13.5 or higher up to 14.4
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Old 08-17-2012, 04:26 PM   #6
JimVonBaden
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Quote:
Originally Posted by mqo233 View Post
yes I did verify the belt,

the cable to be cleaned, I assume you mean that hook to the alternator?

thanks

James
Battery cables, starter cables, and check the alt cable.



Merlin,

This is an alternator like a car.

Jim
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Old 08-17-2012, 04:55 PM   #7
def
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Once you have exhausted other simple things like loose connections or corroded cables as Jim Von Baden was suggesting, you're likely going to have to remove the alternator eventually. I would remove it and take it to a starter/alternator service and have it repaired. It is rare that an
alternator needs replacement on a BMW.
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