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Pretty sure I'm going to have to do what you just said follow the wires back I've looked at the owner's manual look at the guy below you posted I just have no luckIt shouldn’t be too far from either (a) the batteries or (b) the entry point for your power cord. Follow the wires from the power entry point if you can. It might be in a small storage area that is accessible from inside the RV as well. Look near the previous locations mentioned, but inside the RV.
TJ