I have a 99 GA GT and none of my interior lights work. The dome lamp and the two lights on the rearview mirror dont light up when I open the door or when i turn the dimmer switch. I am leaning towards a bad fuse though. Lately, the lights take a couple of seconds to come on after i open the door too. Thanks for any input.

Thier is an interior lamp dimmer fuse in the pass side fuse box A, then a interior lamp fuse G.

If those are good then check teh dimmer switch its self for power with a voltmeter. Should be 12volts when the dimmer (grey wire) is on high and lower the voltage as you dimm the lights.

I just checked and fuse G was blown. Replaced it and the lights work again. Yay. Well why would the fuse have blown. I hope theres not a short somewhere. Thanks.