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Author Topic: Battery voltage jumping  (Read 6717 times)

Offline pipo_esa

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Battery voltage jumping
« on: October 11, 2010, 03:04:31 pm »
Battery voltage is jumping in Vemstune display from 12.6 - 14.4 volts

Input voltage to board is about 13.7 volts and it is steady.

Is this just configuration problem or is there some problems with board?

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Offline pipo_esa

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Re: Battery voltage jumping
« Reply #1 on: October 12, 2010, 08:47:26 am »
When engine is not running, voltage is steady 12.5 volts on vemstune
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Offline MWfire

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Re: Battery voltage jumping
« Reply #2 on: October 12, 2010, 10:00:17 am »
your alternator is dead.
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Offline Denmark

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Re: Battery voltage jumping
« Reply #3 on: October 13, 2010, 04:42:34 pm »
Loose ground wiring on engine,
I had the same on a Subaru, one ground that was not on tight would make it all craisy


/Skasa
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working on the boxer

Offline pipo_esa

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Re: Battery voltage jumping
« Reply #4 on: October 14, 2010, 09:30:37 pm »
Ok, got to check ground cables
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Offline pipo_esa

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Re: Battery voltage jumping
« Reply #5 on: November 03, 2010, 09:44:17 am »
Found few loose ground connections and voltage is steadier now but still jumping

Check alternator and it is giving steady 15 volts which is bit high
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