Jayco Swan Campervan

You need to unplug the 12v plug for the roof lights, usually near the sink.

Geoof

We used to have a Jayswan with a similar warning.
If the ceiling lights were accidently left on and they were an oyster type fitting with an incandescent 40w globe and when the roof is lowered the lights come in contact with the mattress the built up heat will burn a hole in the mattress. This happened to us.
The remedy for me was to put a momentary switch on the side where the ceiling wiring goes through that pocket in in the canvas so that when the roof came down and contacted the top edge of the camper body the power to the lights would be cut.
Stan

Hi I have a Jayco Eagle 1993 model and it has a contact switch, like a car door switch, mounted about halfway along the drivers side upper section and when you shut the unit it contacts the bottom and open the switch , thus isolating the roof lights 12v, handy if you leave it switched on accidently, which is easy to do if you are in a park using 240v and some times switch on the wrong switch,
when I am only doing park trips I remove the 12v globes as well, only a minute job, but as the wife say's " belt and braces" thats me ,
Cheers Des.