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No power to instruments or starting
Posted: Tue Mar 16, 2021 10:19 pm
by robparky
Kept Battery topped up over winter and started ok a few weeks ago. Tried recently and nothing when turn key on instruments, lights, starter switch or my volt meter wired into the aux power circuit. Any ideas before i start with circuit light- Side stand switch has been playing up along with gear position selector which i believe is damp related. Battery fully charged.
Thanks Rob
2007 RTP
Re: No power to instruments or starting
Posted: Wed Mar 17, 2021 12:35 pm
by David.
Is the "battery fully charged" an indication from a battery charger or has a voltage check on the battery itself been done with a voltmeter.
Re: No power to instruments or starting
Posted: Sat Mar 20, 2021 7:18 pm
by robparky
Battery charger. Multimeter has also given up the ghost.
Re: No power to instruments or starting
Posted: Sun Mar 21, 2021 9:44 am
by David.
The battery may have become sulfated,
http://support.rollsbattery.com/en/supp ... -sulfation
"When hard sulfate is present, the battery shows a false voltage, higher than it's true voltage, fooling the voltage regulator into thinking that the battery is fully charged.
This causes the charger to prematurely lower it's current output, leaving the battery discharged."
Re: No power to instruments or starting
Posted: Sun Mar 21, 2021 2:23 pm
by robparky
Thanks. Will check this out. Neighbour also has old BMWs so enlisting his help.
Re: No power to instruments or starting
Posted: Sun Mar 21, 2021 9:23 pm
by robparky
And the problem was-- loose +ve on the battery- Arghh such basic error. Don't know how it had changed between last start up and now. Hasn't moved off the stand.
Oh well at least it is sorted. Ordering multimeter as treat to self.
Thanks
An embarrassed biker. :alas: