If you are referring to fuse box under the hood, all the fuses should be labeled, even if it looked different the fuses should be labeled either next to the fuse or on the lid. I would hook a meter to the plug on the coach and see if you have power, problem could be with your trailer. Also make sure you have a good ground between the two, many times not having a good ground is the only problem. If you don't have power at the plug then you can start tracing back, might be unhooked wire or plug. Good luck!!!
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