[atreis]

If you're tripping a breaker there's a short somewhere. There are many places this could be including an appliance, within a junction box, wiring with insulation that has rubbed off, or wiring that's been pinched. If it's not an appliance (easy to eliminate by just unplugging everything) it can take a while to locate. How to start: unplug everything, see if the breaker still trips. If not, then it's an appliance and you can just start plugging them in until the breaker trips and repair/replace the one that trips it. If it's not an appliance, then your only choice really is start tracing the wiring from the breaker until you find the bad spot. On a trailer, this is not an easy task...