Have RV Questions? Ask an RV Mechanic Online.
Hi! My name is ***** ***** I can assist you with this. I may need some additional information from you first in order to give a complete answer.
The two most probable causes of this on a trailer are a bad plug on the shore cord OR a bad main breaker in the load center. This is pretty easy to track down if you have a small digital multimeter. About $20 or so at most hardware stores and easy to use. I can direct you in some testing as part of the follow ups and included in our fee. Please get back to me when you are ready and please include the make and model of your load center. Most of that era were either made by WFCO or Magnetek.
Since I never did hear back from you, I am thinking you got this issue resolved, but if not, please get back to me and I can help you get to the bottom of the problem.