Switches in garage don't work

[gmsumsion]

Hi. I recently bought a Sierra Sport 5th Wheel with a 12 foot garage. In the garage, next to the exterior door are four switches. They control: rear flood lights, large rooftop flood light, exterior light next to door, and an overhead fluorescent light. These four switches can be simultaneously turned off via a switch inside the door from the garage to the main living are a of the trailer.

None of these switches is working -- at least not consistently. There have been times since I purchased the trailer that the lights back there have worked, but for the most part they do not. I have flipped the interior switch both directions, nothing. I have double checked to make sure none of the fuses is blown -- they aren't. I have even removed the interior switch and hard wired together the two wires that connect to it. Still nothing.

Any suggestions?

FWIW, there are also two other lights in the garage area that are independently switched. Both of those lights work fine.

[caper]

My bathroom light was doing the same. There was a lose connection for the wiring in the ceiling. It took me about 1 1/2 hours to trace where the bad connection was.

[Iggy]

I would suggest to check the breaker and panel where the power comes from and check the screw and wire going out of the circuit breaker. After that I would suggest to check the neutral wire (white wire). You may find this loose and I think this is your problem.
Without asking a lot more questions about the garage this is the best I can suggest at the moment.

[tlhintoq]

My Sandpiper f37sp has the same 4 switch gang.
But... there is a switch next to the door from the kitchen to the garage. That switch leads to the 4 switches. If the switch at the kitchen door is off, then there is no power to the 4 switch plate.