Digital display will not show radio stations but displays time & temperature, HELP!!!

I bought a renault clio and changed the stereo back to an original, i wired it up and I know I need to put the radio code in but I can't do this until the digital display shows the zeros! And the only thing it will display at the minute is the time and temperature. (I know the radio and digital display both work there is no fault with them) I was wondering if anyone knew what wires connected to the digital display to make it display the zeros so I can enter my code?