16pin OBD2 Male to 9pin J1939 Adapter for Truck Freightliner Code Reader ELD ...
$28.26
The obd2 connector is 16pin male ,and the J1939 connector is type 2 green 9pin female. This adapter turns obd2 port to J1939 port. It's easy and safe to use it. It's small ,and it will not interfere underboard.