Jack, you need a 57003 adapter made for late model trucks and RV's with LED lights. Yes, they do work, flawlessly. We had the same trouble.
Go here: https://www.amazon.com/57003-7-Way-B.../dp/B00AFVOF3M
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Jim and DW 50 years Brenda
2018 40rssa and 2021 Jayco Eagle 40'
2019 F450, ruby red
Harley Road King & sidecar
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