My interior lights- gauges, dome light, HVAC controls, etc... have started flickering when the car is idling. At first I thought it was because I'd soldered something wrong (I've replaced a lot of bulbs with LEDs), but I think it's not something I did. Any idea what it could be and how much it'll cost to fix?
OK, new development- I went to start my car today and the power suddenly went completely out- no battery light, even my head unit reset itself (lost EQ settings... %*@#$). I tried again about a second later, and it started up fine- no flickering! After driving home, it had started to flicker again, but much much less noticiably.
Sounds like something loose to me; but I checked the battery connections and they're fine. WTF?
interior lights flickering at idle 
Linear Mode
