Join Date: Jun 2006
Location: Eastern ON Canada
Car: 07 OBW 2.5i D-4AT
Feedback Score: 7 reviews
A few initial possibilities:
The new bulb is defective (wouldn't be the first time);
The new bulb isn't making good contact with the end holder(s);
The dome light switch is set to the Off position instead of On or Door;
The fuse is blown.
If you have another bulb, try it, and make sure the holders are tight against the bulb.
If you have a multimeter, with the switch set to On, check for 12 V or so between the two contacts. If it's there, then the bulb is bad. If it's not, check the fuse.
Also, see if the map lights work -- they're on the same fuse.
The fuse is in the main fuse panel in the engine compartment.
Let us know what you find.