Interior Lights issue!!! HELP

[Jamnall]

2009 3.8 Sedan 128,xxx miles
This car has the strangest issue. For the last 2 years when the outside temp is above 32 degrees. None of my interior lights work as in Radio buttons (display works), ac/heat, gear shift, steering wheel control lights, etc...

ALL OF THEM QUIT WORKING The instrument cluster, radio display, ac/heat display light up. Its like it's stuck in daytime running mode.

When I start the car all of the lights stated above will flicker.

The funny thing is, when the temp is below freezing, all of the light's work.

Paid for 2 electrical diagnostics and they could not find the problem. Tired of wasting money with no resluts.
Any help would be greatly appreciated

Will be posting another issue with this car after this one

 

[landtuna]

You have a wiring problem of some sort. A fuse is loose (and easily checked) or a wire connection is loose. Possibly a ground. As long as the fault occurs consistently then any good electrical shop should be able to find the problem. If it is an intermittent problem then you are having the worst type of failure.