Had the same problem.
When we picked up our new JAYCO, we had lights. Then when we went to use it, the first time, our lights didn't work. Turned out that Jayco had run the green wire on two of the lights, to ground, because the were pulling too many Amps and with them running the wires to ground, they reduced the load, but after a while it caused the lights to quit all together. Find a repair place that will check each light for the correct wiring configuration.