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Posted by Queenmfn on June 18, 2008, 8:41 pm
1982 Yamaha Seca... yep, it's me... Still trying to figure this thing
out!
The battery warning light stays on, but yet the battery is staying at
12 volts...
Anyone know why that would be??
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Posted by Mike Corey on June 18, 2008, 10:16 pm
queenmfn@yahoo.com (Queenmfn) wrote:
>1982 Yamaha Seca... yep, it's me... Still trying
> to figure this thing out! The battery warning
> light stays on, but yet the battery is staying at
> 12 volts...
>Anyone know why that would be??
A properly charged battery should read around 13 to 13.2 volts. Clean
every connection, everywhere, if that doesn't help, look at the charging
system.
"War is an ugly thing, but not the ugliest of things; the decayed and
degraded state of moral and patriotic feeling which thinks nothing is
worth a war, is worse." --- John Stuart Mill:=A0
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Posted by Who Me? on June 18, 2008, 11:00 pm
>A properly charged battery should read around 13 to 13.2 volts. Clean
>every connection, everywhere, if that doesn't help, look at the charging
>system.
So, where, pray tell, did you get that little piece of mis-information ??
A wet-cell, lead acid battery has 2.1 volts per cell. String 6 of them
together and you get.......12.6 Volts.
A properly operating charging system, however, might well read 13-13.2 V. at
the battery while it's charging but it won't stay at that voltage very long
after the charge is removed.
Of course, none of that helps the OP, since, so far, nobody knows what the
battery light is actually monitoring. Some bikes had a probe to alert when
the electrolyte was low.
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Posted by . on June 18, 2008, 11:52 pm
> The battery warning light stays on, but yet the battery is staying at
> 12 volts...
> Anyone know why that would be??
Yamaha : XJ750J (1982 Motorcycle) had an electrolyte level sensor in
the original equipment battery. If the electrolyte is low (or the
sensor is disconnected) the battery light will stay on when the engine
is running.
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Posted by Rob Kleinschmidt on June 19, 2008, 2:49 pm
>
> > The battery warning light stays on, but yet the battery is staying at
> > 12 volts...
> > Anyone know why that would be??
>
> Yamaha : XJ750J (1982 Motorcycle) had an electrolyte level sensor in
> the original equipment battery. If the electrolyte is low (or the
> sensor is disconnected) the battery light will stay on when the engine
> is running.
So going back to the original posting, it'd be a good
idea to check the fluid levels, fill as needed with
distilled water, place the battery on a charger
overnight, then check the voltage with the engine
both stopped and running. Should be about 12.5
stopped and 13.5 or better while running fast.
If it won't charge and hold to about 12.5, it's
time for a new battery. If it'll charge to 12.5
volts but the charging system can't bring
it to 13.5, the charging system probably needs
some attention. If it goes much over 14 volts
while running fast, there could be a regulation
problem causing the battery to boil away water.
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