We run 4 toyota 8hbw23 walkie pallet jacks in my shop and on our trucks. One fell over in the truck and was loaded with corrosion as some of the water from the batteries got on the connections. It worked fine for a few months and we removed the connections and took a wire brush to the battery terminals to remove the corrosion. Went to turn it back on and got an error code of E250. Can't find anything online about this code. Has anyone dealt with this before? This happened yesterday(saturday) my dealer is not open. It kills me that the unit was running fine and then I took wrench to the terminals and a wire brush and now its not working.