I have 1992 SSE Bonneville with electroinc climate control with rear defrost and OEM stereo with cassette and equalizer.The display for both keeps going out.If there car is cold it will work for awhile,then after the car gets warm,both displays turn off.Everthing else works fine,I can use the buttons to control heat and the radio works fine,just no display.The climate control does not flash.The radio and climate control display is either on,or off

Please pull both out and check the connection and ensure all of the wires are fully inserted into the connectors.

Ok,I wll try this first.I'm worried if there is a driver on something inside the radio that gets tempature sensitive,then fails

I'd think this is a loose wire issue, although it might be something else.

Once you check the connectors and try it out.. let us know and we can help further if needed.

Keep in mind the STEREO controls the brightness/dimness of the ECC display. That'* where your problem will lie. Inside the stereo, or the harness from there to the ECC.