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This specialized diagnostic cable adapter connects 9-pin J1939 ports to standard 16-pin OBD2 diagnostic interfaces, making it an essential tool for heavy-duty truck diagnostics. The robust connector features a durable black housing with a distinctive green 9-pin end, designed for reliable connections in professional automotive environments. The cable enables seamless communication between diagnostic tools and trucks equipped with the J1939 protocol. Perfect for mechanics, fleet maintenance teams, and diagnostic professionals who work across different vehicle types. The flexible cable construction allows for easy handling while maintaining signal integrity. This adapter bridges the gap between modern OBD2 scanning tools and heavy-duty vehicles, eliminating the need for separate dedicated diagnostic equipment.