I just recieved 2 sets of blue neons tubes for free. I was never really into these ricey neons but it's for free, so i'm just gonna use it. I want to put 2 in the front and 2 in the back ,so when i open the door (the dome lights turn on) the neons will also turn on and when i close the door the neons will also turn off. I'm not sure which wire i should tap into or wire into. Thanks

 

Tap into the dome light or one of the ones in the footwell. You could use one of those +12V sources as a trigger for a relay to your neons.

CM.