I have a 1990 BMW 535i with appx 150k miles.
I have no instrument panel lamps, along with no led odometer.
The radio dims when I put the headlights on but the instrument cluster is dark.
The brake, high beam, directional indicators work fine and light up without a problem.
I tried the dimmer switch. I was getting a brake & tail light "out" indicator and I replaced all the bulbs. All the fuses are good.
I don't know what's wrong. Any help is appreciated.