Been having this problem for quite some time now. Probably around the time I did my LED swap, which was about 2 months ago. So basically, whenever I have my turn signal on, the interior lights flash, even the tail lights. I've been reading around a little bit. Not too good with wiring, and I dunno if it's my Alternator or what... Anyway heres a little vid I took on my way back from work from my phone, which is why the quality sucks, and everything looks so dim. Sorry about the music lol. I didn't feel like getting out of my car to show the tails, but I did show the interior stuff.

http://www.youtube.com/watch?v=mxWGYISisSI

Tell me what you guys think. It's probably been covered and I just don't know how to search good enough

 

1. Do you have LEDs for your turn signal? If so, you could have one bad thats causing the rest to mess up. try taking them out one by one, see if you can find a fault.

2. My 3.0 has done that twice, and both times it was my alternator. but start with the lights, if that was the last thing done to your car.

 

Check all your LED bulbs, could also be the battery, the alternator, or the flasher relay