2002 Mustang Interior Lights

I am sure it must be something I am doing wrong, but my interior overhead lights do not come on when I open my door(s).
I can turn them on manually with the rocker switch on them.
I looked for switches in the door jambs.
So, what gives?

can you still turn them on manually by turning the headlight switch to the left, the switches on the sides of the dome are for the outside reading bulbs. the bulb in the middle is the dome light that if you cannot turn it on from the headlight switch area youve got a blown bulb. if thats the case take a flathead screwdriver pop the cover off and take it out

6Speed,
Thanks for the reply, I cannot turn it on from the headlight switch, so I will check for the blown bulb.
Thanks again.