: For some N3 models, a specific green cable (often linked to Pin 6 on aftermarket interfaces) must be grounded or powered to activate video functions.
Are you planning to an RT3 unit into a vehicle that originally had an RD4 radio, or are you repairing an existing system? Magneti Marelli Rt3 N3 Wiring Diagram - Facebook Magneti Marelli Rt3 N3 Wiring Diagram
This integration means the wiring diagram is far more complex than a simple "Power, Ground, Speaker" schematic. Interpreting the diagram requires an understanding of both analog audio signals and digital data transmission. : For some N3 models, a specific green