Bobcat 6676156 is an OEM electronic control unit that manages hydraulic and motor functions on compact loaders and skid‑steer machines. Common failure points for this class of controllers include degraded power‑rail voltage, burnt or cracked PCB traces from over‑voltage events, and faulty I/O modules that misread sensor inputs. Begin troubleshooting by verifying the 12 V/24 V supply rails with a multimeter, inspecting the board for burn marks or loose solder joints, and checking all signal connections to the hydraulic valves and motor drivers for continuity and correct polarity. If the unit passes these checks, review any stored fault codes via the diagnostic port before proceeding to component replacement.[oss-gpt-20b]