Battery voltage jumping

[pipo_esa]

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?

[pipo_esa]

When engine is not running, voltage is steady 12.5 volts on vemstune

[MWfire]

your alternator is dead.

[Denmark]

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

[pipo_esa]

Ok, got to check ground cables

[pipo_esa]

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