Hi we have this 2012 AC hyster truck. At some point it used to be pyroban specs but not used as a pyroban spec currently.

The truck all works fine and non-issue except that after leaving it for a few minutes you can see the battery cables jumping as if they are pulling some heavy current.

The truck has no earth faults, we also tried another battery off another truck but still this issue with battery cables jumping.

Has anyone come across this type of fault before?

Thanks