oh what a can of worms ! 3 positions on a
light swich could mean a couple of things like hi or lo
lighting leveles 3
lights on or 1 ect.
lets start off with the
lights
are they big
lights like you find in your home
or are they small lights that look like they might come out of your
tail lights?
<img src=http://www.fiberglassrv.com/board/uploads/3f426c0466b0a2basic dc.JPG/>
i may be wrong but i suspect they are small and are powered by a dc source . look around do you have something that is called a power converter? lets start finding out what you have
good hunting :wave