It sounds like a problem with the clock, but the Fuse is the "CIG" Fuse in the Instrument Panel Fuse box (15 amp)
Most likely not, unless there is a loss of power to the clock, which would result in an inop clock.
The fuse panel is located behind the Coin Tray:
Thanks for your diagrams they really help.
I guess my next question would be since the clock is out or worn out. And when every other electrical system is working fine. How do i fix the clock so that It displays the time as It should.
Replace is really the only option, because there are very few repair shops for that type unit. It would probably cost more to repair than replace with used or maybe new.That is not to say the connection may be bad at the clock, which you need to check prior to replacing.Be sure to check Voltage & Ground also