Check all the fuses first, if they're fine,
For the radio(if it's in fact the whole radio and not just the head unit light); check the fuse on the back of the radio if it has one, check for current from Battery+ wire leading to radio, or ground. if those check out fine, the radio itself is most likely dead, if nothing had power it could be a relay on the printed circuit board(don't touch this with your fingers), have a technician diagnose this.
For the dome light; check current to the switch, if it checks out fine move to the light itself, if it checks out fine replace the bulb, if there is no power at all it could be a relay, or a B+ wire is shorted out, or the ground isn't good.
first check for voltage to the light . If it is ok, check for the ground.
The bulb is burnt out, the fuse is burnt out, the battery is dead, or the wiring has come loose (rather unlikely)
a relay does not control both dome light and the radio.
Sounds like the switch that is in the door frame might be broken. In some cars the switch is in the inside wall of the door frame. You can see it with the car door open. The button gets pushed in as the door closes against it, turning the circuit and the dome light off. Some switches are housed inside a rubber boot that sits in the door frame. I had a truck once with that style switch and it needed a little fiddling to get the light to come on. Its possible that the button on the switch broke off. Then the door doesn't push against the button to turn the circuit off, so the light stays on constantly. A last resort work-around might be to pull the bulb out of the dome light. Then you could have the fuse in to operate the radio and the battery won't drain down, I'd assume.
Check fuses
does it have a door ajar switch. if it does, may be stuck or faulty. there is no door jar switch
The circuits have nothing in common. The dome light works whether or not the key is on, the radio only works with the key on.
Most likely the fuse is blown for the dome light on the Silverado if the light doesn't come on.
Put the dome light switch on door located on the headliner to the side of the light
Keep messing with the headlight switch, the dome light should come on depending on the car model.
If you push that button, the dome light inside of the truck won't come on when you open the door.
AnswerThey are usually held in place by 2 or 4 clips built into the cover. Squeezing or carefully prying the cover sideways and it will come off.I dont need to just take off the cover, because it was busted so bad i have to remove the dome the light is place in. i need to replace the dome, cover, and light.
The year, make and model info would help.
i dont now
The dome light switch has 3 positions. Off-On-On when the door is opened. Put it in the proper position.
Sounds like you hooked into the wiring to the dome, or disconnected it.
courtesy light or dome light(small interior light located on headliner) inside of car ,will come on when door is open
The dome light switch on the dash is on.
The "dome" is the light on the ceiling of your car. It is called a dome because this light is usually shaped like a dome.