In 2002, TMs had the so-called "elegant lights", a pair of brass wall fixtures with shades, mounted on the sidewalls beneath the overhead bookcase/cubby. I think the 2001 models had them as well, but by 2004 they were gone. They were discussed in this thread in 2001
http://www.trailmanorowners.com/foru...read.php?t=363
At any rate, the vibration of travelling made these lights troublesome - the bulbs lost contact in the sockets, the filaments broke quite often, and the shades dropped off and got squished or disappeared. Somewhere between the 2002 model (which I owned) and the 2006 model (which I own now), TM stopped using the elegant lights, and substituted garden variety eyeball floods mounted on the underside of the bookcase. Later, I think they substituted rather ugly surface-mount lights, same as the ones on the ceiling.
Possibly a previous owner removed the lights and patched and papered over the holes in the wall. Does your TM have a black knob, a rotary switch, in any of the fan openings? If so, the wires are dead-ended back there somewhere, and you could add lights if you chose.
Bill