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Unread 08-17-2016, 08:41 PM   #1
Not Yet Wild
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Default Battery @ 9v ?

I have a couple problems/symptoms that may be related.

Firstly on my DS, my after-market lights are not working. I had them running off a stepdown transformer to take my 6x8 bank down to 12V and have been fine for several years. When I measured at the switch it now shows 20V.

Additionally all my batteries seem to be measuring around 9V?? 54v at the motor.

Ideas? Failed transformer? faulty meter?


Thanks
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Unread 08-17-2016, 08:45 PM   #2
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Default Re: Battery @ 9v ?

hey,


it doesnt sound like any issues, do the lights still work?
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Unread 08-17-2016, 08:46 PM   #3
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Default Re: Battery @ 9v ?

Quote:
Originally Posted by yamahaguy97 View Post
hey,


it doesnt sound like any issues, do the lights still work?
i



nevermind i see you said they dont work sorry. voltage reducer could have went bad but not sure
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Unread 08-17-2016, 08:47 PM   #4
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Default Re: Battery @ 9v ?

54 volts in a 48 volt system is not abnormal especially after a really good charge
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Unread 08-17-2016, 09:18 PM   #5
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Default Re: Battery @ 9v ?

What kind of VoLt meter, if the battery in the meter gets weak the meter will no read right on most meters.

Do you have a fuse on your lights?
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Unread 08-17-2016, 10:13 PM   #6
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Default Re: Battery @ 9v ?

Thanks ... yes there is a fuse and I checked it looks good. Good to hear that the 9V reading is not a problem.

Could even be the switch I guess? I just thought the 20V was odd and didn't know what the effect of 20V would be on 12V lights.
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Unread 08-17-2016, 11:02 PM   #7
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Default Re: Battery @ 9v ?

12v nominal should not be much above 13.5 max. So yeah, 20v output indicates a step-down failure.
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Unread 08-18-2016, 01:00 AM   #8
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Default Re: Battery @ 9v ?

Let's think about this 9 V on each battery supposed to be eight something Your numbers don't match up check your meter was the charger plugged in when you took these measurements 54 volts is too high in less the chargers on
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Unread 08-18-2016, 08:24 AM   #9
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Default Re: Battery @ 9v ?

Quote:
Originally Posted by greg-g View Post
Let's think about this 9 V on each battery supposed to be eight something Your numbers don't match up check your meter was the charger plugged in when you took these measurements 54 volts is too high in less the chargers on
+1 on that. Sounds like your measurements where taken while plugged in or directly after unplugging.
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Unread 08-18-2016, 09:30 AM   #10
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Default Re: Battery @ 9v ?

The Reducer output should be about 13.5V on a nominal 12V unit. That is about what a standard 12V battery puts out when it's fully charged.
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