Eletrical short
You are correct David, to find a short in a circuit that includes all those lights and the lenght of the couch twice. I once knew a mechnic that tried to find a short in a, new still on the lot Cadilac deville. he worked on it for two days and decided that he would by-pass the fuse and then find the smoke. He did find the short after he burned the head liner out, to the tune of 1500.00 to repair the damage. I may just rewire the lights to differant hot wires that I can find in any handy location.