opera lights out

I have a 1988 delta 88 royal brougham 3.8 FWD 4 spd auto trans with the opera lights in the doors posts. I cannot find the bulbs that illuminate the fiberoptiic line I traced it back under the dash and it goes into a wireharnes that has numerous white wires
I know there is a bulb somewhere ??
The bulb for the fiber optic lines for the keyhole is in the armrest under the elec window controls and both of those were burnt out as well- easy change
thanks
Ray