My interior lights themselves work fine (all 600 of them), but it's the illumination behind my buttons and miscellaneous that's the problem.

When I first bought the car they would often flicker if they weren't off altogether, when I took it to the car wash they would work for a while after (usually until I turned the car off).

But recently they just stopped working completely, I assume it's more than likely a wiring issue but I have yet to get a repair manual and don't have the slightest clue where to look (I'm used to the simple oldies).

Any suggestions?