T and C dash lights inop

I was driving my wife's 2001 Town and country tonight and I noticed that
none of the lights are on for anyting in the center of the dash. All of the
LEDs were lit if the device was on like the ones on the radio and digital
temperature control but there was no back lighting on anything else. I
would have figured that there would have been lights behind the buttons on
the radio and the buttons of the temp control. It is impossible to adjust
either device at night without turning on the overhead light so that you see
even the power button. does anyone have a schematic so that I could
identify the common wiring for the entire center of the dash or, has this
happened on other vans and a solution is already known? Hell, for all I
know, it may have been this way since we bought it as I very seldom drive
the thing let alone drive it at night.

-Jerry