[V8] Display Question

[Brad Hartman]

My 1990 V8 has a small square display above and between the speedometer and 
the tach.
It displays warning symbols such as battery, low fuel, low wiper fluid, etc.
and also the radio station selected (if the radio is turned ON).

When the headlights are ON, this display dims a bit (this is normal.)  When 
the headlights
are ON, this display will not show the radio station.  When the headlights
are OFF, the radio station is displayed.

This display will show the warning symbols both when the headlights are ON
and OFF (again, dimmed when the headlights are ON).

In summary, the only thing that does not display is the radio station when
the headlights are ON.

Is this normal?

If not, any ideas?

Thanks,

Brad