The JCB 400J7374 is a genuine OEM cab roadlights harness specifically designed for JCB Fastrac 4000 and 8000 series agricultural tractors. This critical electrical component ensures the proper operation of the cab's roadlighting system, providing essential illumination for safe vehicle operation. Manufactured to JCB's stringent quality standards, it guarantees precise fitment and optimal electrical performance for compatible models, including Fastrac 4160, 4190, 4220, 8290, and 8330 from 2018 onwards.