The McCormick 3549806M91 is a genuine OEM lamp switch designed for controlling lighting functions on McCormick CX series tractors. This high-quality switch ensures reliable operation of headlights and other lighting systems. It is also compatible with a wide range of Massey Ferguson 3000, 4000, 5000, 6000, and 8000 series tractors, as well as various Landini tractor models including Powerfarm, Rex, and Vision series, providing broad application across multiple agricultural machinery brands.