Your lights are all 12 volt DC. If none of them work, I doubt it's because of bad bulbs. Because your battery is brand new the first thing I'd check is the cables to ensure they did not get swapped on the terminals. From the battery there should be an inline fuse on the positive lead on the tongue. Other things to check are the radio and vent fans, as well as any other 12 volt items. I'd also suggest unplugging from shore power while poking around in the wiring.
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