I had a similar problem with a '70's model Pontiac. There had been an aftermarket stereo installed and believe it or not the + and - were backwards (radio was wired backwards) Only difference was if I had the radio on and turned the high beams on it blew the radio fuse. Hope this helps you.
my lights didn't go out.
There may be an issue with the relay switch going to the radio lights. There may also be an issue with the fuse.
what makes my 2002 inside lights will work during the day but not night, my dashlight, speedometer ,radio lights
If a 1987 Chevy Suburban has lights and horn, but no ignition, gauges, radio, or interior lights it could be a ground wire problem. It is possible that there is a short somewhere. Also check the dome light for a possible water leak in the headliner.
The instrument cluster lights have their own fuse. It's a 5 amp at the bottom center of the fuse block. When the lights are on, the radio draws lamp power from the instrument cluster. This allows you to dim the brightness of the radio display with the other internal lamps.
open the passenger door in that fuse box
Bad fuse
dash lights radio info center lights do not work all the time. change the fuse but that did not solved the problem
It is usually wired in with the radio or the courtesy/dome lights.
A pinched or crossed wire for a 91 Chevy crew cab plow could cause the lights and radio to not work. They could also be separate problems. Start but checking the marker lights fuse, then recheck all of the snowplow wiring.
I just did this to my radio. You must remove the radio for the dash. Open the radio to reveal the circuit board and solder new bulbs on the board. I found the bulbs at Radio shack online.
check the radio fuse (rdo) under the hood, it should be 15 amps