In my case it was the latching relay. All the fuses were good, and I could hear it clicking when I operated the switch, but it would not stay latched. I replaced the relay and it's all good now.
This was the proper replacement part for my 2018 Chateau. The relay will have a part number on it (e.g. LR9806T1-BIP), so check yours and make sure you order the right one.
https://pdxrvwholesale.com/products/...y-lr9806t1-bip
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