pull one fuse a time to narrow possibles then isolate hot wire
The fuss # is A6 UNDER THE dash.
The fuse box and battery are under the back seat on a 2003 Pontiac Bonneville.
You need to take of the door panels!
The body computer is in control of the interior lighting.
Try replacing the bulb. Changes are that after 10 years, it may have burned out.
The fuse that says "room".
not to sure but on my vectra it normally controls the interior lights, but you have to pull the switch out to put the interior lights on
in the fuse box
Should be in the middle of the inside drivers door below arm rest , next to interior light.
The interior lights are controlled by the headlight switch and are protected by a fuse.
which fuse controls the lift gate or interior lights on a 2003 ford expedition
interior fuse box above the hood release. Its fuse #6 (7.5 amp)