lesabre dash lights

Have a 94 lesabre and the radio a/c lights blink when headlights are turned on at night. During daytime lights are blinking brightly if headlights are turned on. Thought the control was in a/c controler (dimmer) but problem continues after replaceing controler (for a/c problems). Any ideas? bumps in the road have not effect, they dimm and brighten even when the car is parked. The dash light dimmer slider has no effect on the problem.

By "a/c" do you mean "acc." and thereby "accessory?"

No, by a/c he means "air conditioning". My 94 LeSabre does same thing. When lights on at night, radio and a/c control lights blink between regular daylight and night dimmed values.

Tried all i could think of in the wiring and fuse area. then i pushed the ETC Button (Traction control) turning it off while in motion. Next tiime I started the engine the light problem was gone. Something to do with the interconnect of chips and sensors. I had replaced the A\C computer about 8 months ago because that had a dimmer function, but no change until I pushed turned the ETC off. It reset on the next start. What a mystery!