1987 AC Delco Radio Help please

[Gordonr1973]

Hi,

I'm trying to get my radio wired back into the truck following my Haynes manual.

I tried to hook it up to a power source first to make sure everything was working and it did except for the clock display.

Can someone let me know what wires do what in the back vs. what it says in my Haynes manual please?

I assume the knobs in the front control front vs back and left vs right so I did check those and they are working fine.

And second question is whether there is a clock light bulb that might burn out on these units or are they what I believe they are, LCD displays?

Thanks!