2013 F150 electrical

Just bought a 2013 F150 xlt 4x4. All
electrical worked no problem until we put a
new 2017 palomino backpack camper in
the bed of the truck. Now, all lights work
except right turn signal, right hazard and
right brake lights. Running lights work and
left lights work. Camper lights worked fine
when connected to another truck. All truck
lights ( including right ) work fine. Only the
right camper light. Help appreciated