yeah i did some more digging and did find that smart system supplement with those codes in it. sure, broken wires at that connector would explain the 9-3 code. The eeprom fault is a different story though, could have happened when those wires broke, could have shorted out on the frame and corrupted the eeprom. I'm not totally sure if they can be flashed in the field, the handset does not have that capability and i do not know of any laptop program for these units, JLG only offers that handset as far as i know. Again, you may still have to consult JLG engineering on that one, either they will say to replace the controller or send it in to be reprogrammed. Only they can answer that one i'm afraid.