dome light, whats wrong with it? Options

[d-roCk]

hey guys when i first bought my car i really wanted to change the dome light bulbs and have colored ones. first i tried to take the bulb off but i couldn't and then all of a sudden now the bulbs don't turn on and the wierd thing is is that when i press the button to turn the dome light on my clock either turns off or on and even when the clock is on its very dim. i really don't know what the problem would be my friend thought it was the fuse but i checked all the fuses i could find and none were blown...

ps also when my seatbelt isn't on the light doesn't turn on and if the doors are open the door open light doesn't turn on either

any help would be great!! sometimes i juss need to find something in the dark and its pretty much impossible for me to find!

THANKS IN ADVANCE!