There is also a INLINE FUSE between the 12VDC Power Distribution Panel and the battery terminals... It should be close to the battery... On new trailers this may be a auto resetable in-line circuit breaker..
Please confirm your battery terminals are connected correctly especially if you have had your terminals disconnected recently. They are so easy to hook up wrong since both terminals have the same size terminal unlike what the automotive industry where one terminal is larger than the other one...
Hand trace the the frame ground cable at the battery and make sure it is connected to the NEG Battery terminal. Look for the word NEG or the SYMBOL '-' on the battery case to be sure you are at the negative battery terminal.
Also in loop between the Converter DC OUTPUT (13.6VDC) is two FUSES usually OFF-SET from the other 12VDC fuses. These are the REVERSE POLARITY fuses and they will blow if your battery terminal were installed wrong even for a split second (lots of sparks etc)
If you find your battery installed wrong correct the wiring first before changing out the blown fuses otherwise it will just blow the fuses again...
I am always testing at my battery terminals with my multimeter. They will read 12.6-7VDC if fully charged and without the shore power connected. When you connect up to shore power then the battery terminals should jump up to the 13.6VDC OUTPUT of the converter/charger unit or higher depending what mode your convert/charger starts up in... 14.4VDC is the highest DC voltage I will ever read coming from my converter/charger. I also check my battery fluid levels on a regular basis by removing the battery caps...
The Battery should be checked often as it is sort of the center of operations for you. It is also part of the DOT Safety features of your trailer Electric Brakes in the event the trailer becomes disconnected when being pulled down the public roads. This will immediately stop your run away trailer and is required to have operational by US DOT folks when on public roads. This could effect your trailer Insurance Coverage or even get you a ticket from the DOT folks. Not good traveling with a fully discharged or disconnected battery...
Roy Ken
