Here is a link to some pictures and descriptions of short stop breakers.
Not all of these breakers have a reset button. Some are an auto reset. A manual reset will have a little button on the end of the breaker. Sometimes, disconnecting and re-connecting the positive battery lead, will reset an auto-reset breaker.
If they won't reset, the breaker could be bad, or, the fault that caused the breaker to trip, is preventing a reset. Besides RV dealers, they are available at most auto parts stores. Probably 6 - 8.00 in price. I carry a spare in the TT.
Can't find it? Follow the positive battery lead, the breaker should be mounted on trailer frame, just before the place where 12 volt enters the trailer (probably a junction box).
If you need to change the breaker, disconnect the battery and shore power while working on it.
Also, check the positive battery lead, for an inline fuse that may be blown.
