I bought the car off my parents in early January, and they where having problems with the dashboard lights. They would randomly cut off but when they turn them on another day they would work. Normally you would hit the dash and the lights would turn on. But after I left the interior lights on over night, not only did those quit working but the dash completely crapped out. I cant remember if my mirrors ever worked. But I tried changing the fuses but it turned out not to be that.
I have a '95 Bonneville SIR, and im new >.<
So its not a fuse problems and I think it could be a wiring problem...

I'm changing one switch later this week and sent one out to another member last night. Personally I've sent or swapped about 10-20 switches in 95'*.

What you can do to fix this up is get a swtich and about 8 inches of the wiring and connector from a JY. Get a 96-99 switch and you'll be all set, just make sure and get the trim ring and **** also as 96-99 was slightly different on the trim ring.

Then swap it out..wire for wire on the connector. I recommend soldering and then heat shrinking tubing onto the wires. Much more info can be found by searching on "headlight switch" with my user name.

If the interior lights still act up after that...please let us know..it could be a couple other things if the interior lights are stuck on.