2004 Montana Dash Lights Not Working

i have a 2004 montana, i have no dash lights, no raidio lights at all. in the daytime if i turn headlights on manually my raidio plays but the lights to raidio go off. and no raidio light. i have checked all fuses, all running lights, parking and turn lights, instrumentation brightness control knob. anybody else had or have this problem? i just tried a differen't headlight switch, didn't fix problem. please help. thanks in advance.

I'll assume you checked the instrumentation brightness control knob. First things first and all.

I'll assume you checked the instrumentation brightness control knob. First things first and all.
yes i checked the brightness control knob.

I have a similar problem on my 2003, but it's intermittent. The only solution that has worked for me so far is to disconnect the battery for a few minutes, then re-connect. That seemed to solve my problem for a couple of months, but it's back again.

When the headlights come on (they're automatic), sometimes the dash lights go dark - all the dash lights, and the radio is black, but everything functions normally. If I put the car in park, set the parking brake, shut the car off and re-start, they usually come back on. It's obviously not a blown fuse or the dimmer switch if re-starting it sometimes fixes the problem.

Anyone got any guesses?

Thought I would follow up with the final solution to this problem. I replaced the headlight/dimmer switch about 6 months ago and the problem has not recurred.