I said blue and yellow, but it’s actually blue (+) and green (-). If you get no joy at the radio swap the two wires, there’s vast inconsistency in what + and - mean in the industry. Also check your adapter wiring
schematic, some adapters require a 4-wire configuration, which means you will have to jumper at the adapter. Usually labeled Rx+, Tx+, Rx-, Tx-, jumper + to + and - to -.