Code 11 - left drive motor - short circuit, Code 12 - right drive motor - short circuit, Code 13 - traction module - in fold back – JLG SSV10 Service Manual User Manual

Page 107: Code 11 - left drive motor - short circuit -15, Code 12 - right drive motor - short circuit -15, Code 13 - traction module - in fold back -15, See table 6-12, Ge 6-15, See table 6-13, See table 6-14