Lights stopped working in caravan

I have a 2011 Jayco Sterling Outback Poptop Mod 17.55.4 OB. We recently plugged a 12v pump for an air mattress into our outside 12v point and turned it on. All of our internal lights (roof-mounted only) don’t work now. I have checked the fuse box and they all seem to be ok. Can anyone offer any ideas?