You have a truck that came off the assembly line after Dec 97. The error codes appearing on the display are saying you have a short circuit condition in the traction drives power circuit. Check to see that the truck's chassis is electrically clean. Do this by removing the battery from the truck and having it connected to the truck while outside of the truck. With the drive wheels raised off the floor, battery as described, push buttons 1 & 4 down and turn key switch ON press button 1. Wait till all switches have stopped clicking note any and all error number that appear, also if an asterisk mark precedes the number code. Is this truck equipped with speed controlled hydraulics. Push button 3 will take you to window 500 (lower right corner) button 1 error memory screen 610.
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