without a model number- this is a guess/ general statement:
when a circuit breaker is tripped a reset button will be poking out...depending on type in may be a black button with a white ring ( to show that is has tripped)...with everything turned off, push the reset button ...you may need to wait a few minutes for the breaker to cool off
push it it an it will latch, and the white ring will no longer be visible.
some other type circuit breakers are a lever (kinda like at home), or a small button poking out which needs to be pushed back in.
usually a tripped breaker will have a white or red part showing to indicate visually...but not always.
on some RV's a complete circuit may have a GFCI type outlet protecting a number of circuits- these are the type which are usually near kitchen and bathroom sinks at home- they have a black test button and a red reset button- check to see if you have any of these.
( for instance on my pleasure-Way, there is a GFCI outlet in the head- if that trips, it takes out the outlet in the galley and the outside outlet.
all 3 outlets are protected by the one outlet with the GFCI on the same circuit