My experience with a Lance camper is that the wiring is abysmal.  Details in assembly are not quality controlled; like tightening fasteners.  Otherwise, it's been the best camper I've ever owned.  Mechanically it is as good as I could ever expect.  
I rewired everything I could get to with correct gauge wire with correct connections and in a harness that routes wires cleanly.  Also labeled everything with each end marked as to what the other end is connected to, so I know where to look to find the other end.