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VEMS Community Forum

Technical => Wiring & Sensors => Topic started by: pipo_esa on October 11, 2010, 03:04:31 PM

Title: Battery voltage jumping
Post by: pipo_esa 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?

Title: Re: Battery voltage jumping
Post by: pipo_esa on October 12, 2010, 08:47:26 AM
When engine is not running, voltage is steady 12.5 volts on vemstune
Title: Re: Battery voltage jumping
Post by: MWfire on October 12, 2010, 10:00:17 AM
your alternator is dead.
Title: Re: Battery voltage jumping
Post by: Denmark 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
Title: Re: Battery voltage jumping
Post by: pipo_esa on October 14, 2010, 09:30:37 PM
Ok, got to check ground cables
Title: Re: Battery voltage jumping
Post by: pipo_esa on November 03, 2010, 08:44:17 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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