I have a 2020 Armada with factory tow package. It has a 7 pin plug in. Everything works fine when I plug in my travel trailer with a 7 pin plug. All lights etc work. But when I use an adapter from 7 pin to 4 pin for my boat, nothing. No lights at all. Bought four different adapters. None work. When I plug my boat into my sons chevy truck with adapter, the boat lights work fine so it is not the boat. Why would the lights work with my travel trailer and not with the four pin adapters?