Jim's right. Get on your knees in front of the curbside closet just ahead of the bath, and stick your head inside. It's at the bottom on the right side. Pull the blue door open. 8 fuses, on the right side, the ones for the purple and yellow wires may well be blown.
For some reason the bathroom lights are a common problem with that year and model (rear bath). Mine heat up the circuit that they are one (purple, IIRC), and are a constant bother.
Next project for me is to install the new voltage converter I bought late last fall, and see if that makes the bathroom (and sleeping area) lights work. If it isn't I am going to try running a new wire, since I fear that there is a short inside the wall somewhere.
Keep us advised as to what happens for you?
ps: welcome! Howzabout some photos of your rig?
If it's to be, it's up to me.