Some of my accessories are not working

SoundGuy wrote:

TucsonJim wrote:
The first thing I'd do is make sure your battery terminals are tight. If they are loose and not making good contact, it would cause your problems.

:h. The OP said he removed the battery but nothing about reinstalling it. Obviously if there's no battery but some of the 12 vdc system still works with the trailer plugged into 120 vac shore power the converter itself has to be working. Who knows, perhaps a fuse or two has blown on the converter, perhaps he was careless and allowed the (disconnected) positive battery cable terminal to touch the frame of the trailer and short out. Without having more specific information about exactly what he did it's impossible to say what actually happened when we can't lay eyes on the situation. The solution is to grab a voltmeter and start probing but that won't do any good unless the OP has some degree of electrical knowledge and a grasp on how his trailer's electrical systems are designed to work. Meanwhile WAGs based on incomplete information are unlikely to help the OP to resolve this ... he needs to be more specific about exactly what he did and didn't do.

I agree and often there are unique things trailer specific on how things are wired up with little consistency between trailers or even manufacturers. Often high amperage items such as slides do not run thru the converter, but come directly off the battery thru a CB often mounted near the battery. The converter only supplies power to that ckt via the charge wire from the converter to the battery. I could see where lights and 12V items in a slide might also be powered from this same ckt. and hopefully they would also be fuzed at an appropriate level somewhere. Thus in this configuration you have to have either the battery installed or at least the cables going to the battery if more than one connected together to get power to that ckt from the converter.

Larry