I had the same problem, my mechanic said the Body Control Module was bad, but he didn't had the computer to program the new module.
In total I paid $400. Diagnosis problem, replacement and program new body control module. And guess what? It didn't fix the problem and they would not refund my money so I called the B.B.B. and nicely told the shop they had 5 days to return my money is a repair that they said would fix the problem but did nothing.
Since the Dealer had to program the new body control module and after the lights still did not work I asked they what would cause the problem. They said in most cases the headlight switch was the cause. "Even if I never use it" (light sentinel system).
They told me that the dimmer part of the switch goes bad. So I went home, took the Instrument Panel off, removed the headlight switch and it was melted. $125 later the new switch was bought and installed, it took about1 1/2 hours and was well worth the time I spent.
the dash lights went out in our older 1995 monti Carlo does the whole dash need to be taken apart or are you able to change lamps from behind
a fuse or fulty wiring the brake lights are useually out the same time as the dash lights if that helps any
Most often in a vehicle when an electrical system fails it is due to a break in the electrical lines. In the case of Dash Lights, however, the most common reason is that the light-blub that illuminates the dash has burned out.
usually the dash lights and taillights are on the same fuse.
you have a blown fuse not for sure which one but it is on the passenger side
I have the same problem..dash lights were intermittent for about a month and now no dash lights at all. My guess is the light switch but I havent checked it yet.
I had this problem with my Monte Carlo, I think it was that I needed a new turn signal switch. I think there was a sensor or something that was broke too?? But I believe the dash panel lights not working at night had something to do with a short in the turn signal switch.
Be sure the brightness control for the dash illumination isn't turned off.
pass side under dash
Should be fuse box on passengers side as you open the door it is right on the side of the dash.
On the passenger compartment side of the firewall, up and under the dash.
The fuse for the dash lamps is blown, or the power feed to the dash panel lamps faulty, or the dash ground has been lost.