Clock doesn't light up

The lights on the radio are dimmed with the instrument panel dimmer control so usually they are fed with a separate 12 volt signal that is separate from the main radio power. It may have a separate fuse but may not. If it's not a fuse it could be a loose connector going to the radio, assuming the rest of the instrument panel lights are working correctly. I suppose it is also possible that the dimmer control has two sections, one for the radio and one for the panel lights, and the section for the radio is bad. Run the dimmer control back and forth stop to stop a few times, push on it etc. to see if that effects it. I suspect it is somewhere in the dimmer circuit.

there is a regulator for the display brightness, you may have it turn'd down or it has stopped working;. it controls the brightness at which the dash lights are. usually has a speedo sign on it. goes up and down. it works with the main light and is conecter to them on the same lighting board if it has gone then a new light swtch control switch will be needed.

what kind of vehicle is this? very important detail. alot of vehicles have multiple bulbs behind the instrument panel. if these bulbs burn out you have to remove the panel and replace the burnt out bulbs.

Interesting same thing here, radio and a/c controls, the cabinet ambiant and the pocket lights on the doors but not the cabin, or dash, or information panel. Have you gotten yours fixed yet, I have check the connectors, pulled the fuse, nothinig found an odd thing drove it through dusk when the auto lights came on and wala there it was for 4 days and gone again.

REPLACE BUSTED FUSES

setting stations on Fords are easy,put it on the station you want to program and push the channel button in and hold for about 2 seconds then it should flash,now the channel is set..now for the clock,with the key on and radio turned off,press the clock button,then press the seek or scan forward or reverse to adjust the time,then hit the clock button again to make sure it sets.

the radio display is lighted by a tiny bulb inside the radio, to change this u must remove the radio from the dash and take off the top sheet metal cover, under that u will see a small twist in bulb socket, replace that little bulb, the bulb is about $2 and avail at any full sevice auto parts store.

Check for a loose fuse, ground, or wire.
Could be the switch as well.

There is a tiny little peanut shaped light bulb inside the radio that provides the light for the dial, it is replaceable, you will need to remove the radio, then pull the top cover off the radio chassis, the bulb is under the cover.

What year is this vehicle? It might have an ambient light sensor that has failed if it's 90's+,but older it's most likely the dimmer switch. If it's early 80's you should be able to replace it w/o having to removed the dash,just small panel cover nearby.