Bobcat 6688404 is a right‑keyed ignition and control panel used on skid‑steer loaders (models A220, S130–S330, T140–T300). Common failures include burnt or frayed wiring in the key switch contacts, corroded connectors at the power feed, and intermittent lock‑out of the engine start circuit due to a faulty relay. For this class of control panels, also watch for cracked plastic housing that can expose internal components to moisture and vibration damage. First‑check diagnostics: verify 12 V battery voltage and proper ground; inspect all wiring harnesses for continuity and physical wear; review any stored fault codes from the engine control unit and confirm the key switch operation by cycling the start/stop sequence.[oss-gpt-20b]