1989 Dodge Ram D-Series Pickups "colon clock flashing" Questions

Clock set on a 1989 Dodge Ram with radio on depress the set button and "p" will be displayed within 5 sec. depress the sel button and hours and a flashing colon will be displayed, rotate the tuning ...

....i have trouble changing the time on the z4 and ive tried several times with pressing the clock buttons but the colon wont flash. why? Are you pressing the clock set buttons above the steering

...clock display keep flashing. Is it normal? I get different answers: some say it is normal that the 2 dots keep flashing, some say it isn't. Which is right? thank you! if the colon is still flashing, ...